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class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Curie (unit)</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 49 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-49" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">49 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%83%D9%88%D8%B1%D9%8A_(%D9%88%D8%AD%D8%AF%D8%A9)" title="كوري (وحدة) – Arabic" lang="ar" hreflang="ar" data-title="كوري (وحدة)" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9A%D1%8E%D1%80%D1%8B_(%D0%B0%D0%B4%D0%B7%D1%96%D0%BD%D0%BA%D0%B0_%D0%B2%D1%8B%D0%BC%D1%8F%D1%80%D1%8D%D0%BD%D0%BD%D1%8F)" title="Кюры (адзінка вымярэння) – Belarusian" lang="be" hreflang="be" data-title="Кюры (адзінка вымярэння)" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%9A%D1%8E%D1%80%D1%8B_(%D0%B0%D0%B4%D0%B7%D1%96%D0%BD%D0%BA%D0%B0_%D0%B2%D1%8B%D0%BC%D1%8F%D1%80%D1%8D%D0%BD%D1%8C%D0%BD%D1%8F)" title="Кюры (адзінка вымярэньня) – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Кюры (адзінка вымярэньня)" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9A%D1%8E%D1%80%D0%B8" title="Кюри – Bulgarian" lang="bg" hreflang="bg" data-title="Кюри" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BD%81%E0%BD%B4%E0%BC%8B%E0%BD%A2%E0%BD%A0%E0%BD%BA%E0%BC%8D" title="ཁུ་རའེ། – Tibetan" lang="bo" hreflang="bo" data-title="ཁུ་རའེ།" data-language-autonym="བོད་ཡིག" data-language-local-name="Tibetan" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Curie_(unitat)" title="Curie (unitat) – Catalan" lang="ca" hreflang="ca" data-title="Curie (unitat)" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Curie" title="Curie – Czech" lang="cs" hreflang="cs" data-title="Curie" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Curie" title="Curie – Danish" lang="da" hreflang="da" data-title="Curie" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Curie_(Einheit)" title="Curie (Einheit) – German" lang="de" hreflang="de" data-title="Curie (Einheit)" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Curio_(unidad)" title="Curio (unidad) – Spanish" lang="es" hreflang="es" data-title="Curio (unidad)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Curie" title="Curie – Basque" lang="eu" hreflang="eu" data-title="Curie" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DA%A9%D9%88%D8%B1%DB%8C_(%DB%8C%DA%A9%D8%A7)" title="کوری (یکا) – Persian" lang="fa" hreflang="fa" data-title="کوری (یکا)" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Curie_(unit%C3%A9)" title="Curie (unité) – French" lang="fr" hreflang="fr" data-title="Curie (unité)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Ci%C3%BAire" title="Ciúire – Irish" lang="ga" hreflang="ga" data-title="Ciúire" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%80%B4%EB%A6%AC" title="퀴리 – Korean" lang="ko" hreflang="ko" data-title="퀴리" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%BF%D5%B5%D5%B8%D6%82%D6%80%D5%AB_(%D5%B9%D5%A1%D6%83%D5%B4%D5%A1%D5%B6_%D5%B4%D5%AB%D5%A1%D5%BE%D5%B8%D6%80)" title="Կյուրի (չափման միավոր) – Armenian" lang="hy" hreflang="hy" data-title="Կյուրի (չափման միավոր)" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Kiri" title="Kiri – Croatian" lang="hr" hreflang="hr" data-title="Kiri" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Curie_(satuan)" title="Curie (satuan) – Indonesian" lang="id" hreflang="id" data-title="Curie (satuan)" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/K%C3%BAr%C3%AD" title="Kúrí – Icelandic" lang="is" hreflang="is" data-title="Kúrí" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Curie_(unit%C3%A0_di_misura)" title="Curie (unità di misura) – Italian" lang="it" hreflang="it" data-title="Curie (unità di misura)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A7%D7%99%D7%A8%D7%99" title="קירי – Hebrew" lang="he" hreflang="he" data-title="קירי" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%99%E1%83%98%E1%83%A3%E1%83%A0%E1%83%98" title="კიური – Georgian" lang="ka" hreflang="ka" data-title="კიური" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Kir%C4%AB" title="Kirī – Latvian" lang="lv" hreflang="lv" data-title="Kirī" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Kiuris_(radiacija)" title="Kiuris (radiacija) – Lithuanian" lang="lt" hreflang="lt" data-title="Kiuris (radiacija)" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Curie_(m%C3%A9rt%C3%A9kegys%C3%A9g)" title="Curie (mértékegység) – Hungarian" lang="hu" hreflang="hu" data-title="Curie (mértékegység)" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Curie" title="Curie – Malay" lang="ms" hreflang="ms" data-title="Curie" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Curie_(eenheid)" title="Curie (eenheid) – Dutch" lang="nl" hreflang="nl" data-title="Curie (eenheid)" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%BC" title="キュリー – Japanese" lang="ja" hreflang="ja" data-title="キュリー" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Curie_(enhet)" title="Curie (enhet) – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Curie (enhet)" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Curie" title="Curie – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Curie" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Kyuri" title="Kyuri – Uzbek" lang="uz" hreflang="uz" data-title="Kyuri" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Curie_(Eenheit)" title="Curie (Eenheit) – Low German" lang="nds" hreflang="nds" data-title="Curie (Eenheit)" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Kiur_(jednostka_miary)" title="Kiur (jednostka miary) – Polish" lang="pl" hreflang="pl" data-title="Kiur (jednostka miary)" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Curie" title="Curie – Portuguese" lang="pt" hreflang="pt" data-title="Curie" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Curie_(unitate_de_m%C4%83sur%C4%83)" title="Curie (unitate de măsură) – Romanian" lang="ro" hreflang="ro" data-title="Curie (unitate de măsură)" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9A%D1%8E%D1%80%D0%B8_(%D0%B5%D0%B4%D0%B8%D0%BD%D0%B8%D1%86%D0%B0_%D0%B8%D0%B7%D0%BC%D0%B5%D1%80%D0%B5%D0%BD%D0%B8%D1%8F)" title="Кюри (единица измерения) – Russian" lang="ru" hreflang="ru" data-title="Кюри (единица измерения)" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Curie_(unitati_di_misura)" title="Curie (unitati di misura) – Sicilian" lang="scn" hreflang="scn" data-title="Curie (unitati di misura)" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Curie_(unit)" title="Curie (unit) – Simple English" lang="en-simple" hreflang="en-simple" data-title="Curie (unit)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Curie_(jednotka)" title="Curie (jednotka) – Slovak" lang="sk" hreflang="sk" data-title="Curie (jednotka)" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Kiri" title="Kiri – Slovenian" lang="sl" hreflang="sl" data-title="Kiri" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Kiri" title="Kiri – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Kiri" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Curie_(yksikk%C3%B6)" title="Curie (yksikkö) – Finnish" lang="fi" hreflang="fi" data-title="Curie (yksikkö)" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Curie" title="Curie – Swedish" lang="sv" hreflang="sv" data-title="Curie" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%95%E0%AE%BF%E0%AE%AF%E0%AF%82%E0%AE%B0%E0%AE%BF" title="கியூரி – Tamil" lang="ta" hreflang="ta" data-title="கியூரி" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B9%E0%B8%A7%E0%B9%8C%E0%B8%A3%E0%B8%B5_(%E0%B8%AB%E0%B8%99%E0%B9%88%E0%B8%A7%E0%B8%A2)" title="กูว์รี (หน่วย) – Thai" lang="th" hreflang="th" data-title="กูว์รี (หน่วย)" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Curie" title="Curie – Turkish" lang="tr" hreflang="tr" data-title="Curie" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9A%D1%8E%D1%80%D1%96" title="Кюрі – Ukrainian" lang="uk" hreflang="uk" data-title="Кюрі" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Curie" title="Curie – Vietnamese" lang="vi" hreflang="vi" data-title="Curie" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%B1%85%E9%87%8C_(%E5%8D%95%E4%BD%8D)" title="居里 (单位) – Chinese" lang="zh" hreflang="zh" data-title="居里 (单位)" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q229354#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit 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.navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox ib-unit"><tbody><tr><th colspan="2" class="infobox-above">Curie</th></tr><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Radium226.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Radium226.jpg/220px-Radium226.jpg" decoding="async" width="220" height="176" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Radium226.jpg/330px-Radium226.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Radium226.jpg/440px-Radium226.jpg 2x" data-file-width="653" data-file-height="522" /></a></span><div class="infobox-caption">A sample of radium, the element which was used in the original definition of the curie.</div></td></tr><tr><th colspan="2" class="infobox-header">General information</th></tr><tr><th scope="row" class="infobox-label">Unit of</th><td class="infobox-data"><a href="/wiki/Specific_activity" title="Specific activity">Activity</a></td></tr><tr><th scope="row" class="infobox-label">Symbol</th><td class="infobox-data">Ci</td></tr><tr><th scope="row" class="infobox-label">Named after</th><td class="infobox-data"><a href="/wiki/Pierre_Curie" title="Pierre Curie">Pierre Curie</a> and <a href="/wiki/Marie_Curie" title="Marie Curie">Marie Curie</a></td></tr><tr><th colspan="2" class="infobox-header">Conversions </th></tr><tr class="nowrap"><td>1 Ci <i>in ...</i></td><td><i>... is equal to ...</i></td></tr><tr style="display:none"><th colspan="2"> </th></tr><tr><th scope="row" class="infobox-label"><span class="nowrap">   </span><a href="/wiki/Rutherford_(unit)" title="Rutherford (unit)">rutherfords</a></th><td class="infobox-data"><span class="nowrap">   </span><span class="nowrap"><span data-sort-value="7004370000000000000♠"></span>37<span style="margin-left:.25em;">000</span> <a href="/wiki/Rutherford_(unit)" title="Rutherford (unit)">Rd</a></span></td></tr><tr><th scope="row" class="infobox-label"><span class="nowrap">   </span><a href="/wiki/SI_derived_unit" title="SI derived unit">SI derived unit</a></th><td class="infobox-data"><span class="nowrap">   </span><span class="nowrap"><span data-sort-value="7001370000000000000♠"></span>37 <a href="/wiki/Becquerel" title="Becquerel">GBq</a></span></td></tr><tr><th scope="row" class="infobox-label"><span class="nowrap">   </span><a href="/wiki/SI_base_unit" title="SI base unit">SI base unit</a></th><td class="infobox-data"><span class="nowrap">   </span><span class="nowrap"><span data-sort-value="7010370000000000000♠"></span>3.7<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>10</sup> <a href="/wiki/Second" title="Second">s</a><sup>−1</sup></span></td></tr></tbody></table><style data-mw-deduplicate="TemplateStyles:r1236303919">@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-has-images-with-white-backgrounds img{background:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-has-images-with-white-backgrounds img{background:white}}</style> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Cobalt-60.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/Cobalt-60.jpg/220px-Cobalt-60.jpg" decoding="async" width="220" height="205" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/21/Cobalt-60.jpg/330px-Cobalt-60.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/2/21/Cobalt-60.jpg 2x" data-file-width="347" data-file-height="324" /></a><figcaption>Sample of <a href="/wiki/Cobalt-60" title="Cobalt-60">cobalt-60</a> that emits 1 μCi (microcurie) of radioactivity; i.e. 37,000 decays per second.</figcaption></figure> <p>The <b>curie</b> (symbol <b>Ci</b>) is a non-<a href="/wiki/International_System_of_Units" title="International System of Units">SI</a> unit of <a href="/wiki/Radioactive_decay" title="Radioactive decay">radioactivity</a> originally defined in 1910. According to a notice in <i><a href="/wiki/Nature_(magazine)" class="mw-redirect" title="Nature (magazine)">Nature</a></i> at the time, it was to be named in honour of <a href="/wiki/Pierre_Curie" title="Pierre Curie">Pierre Curie</a>,<sup id="cite_ref-Nature1910_1-0" class="reference"><a href="#cite_note-Nature1910-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> but was considered at least by some to be in honour of <a href="/wiki/Marie_Curie" title="Marie Curie">Marie Skłodowska-Curie</a> as well,<sup id="cite_ref-How_the_Curie_Came_to_Be_2-0" class="reference"><a href="#cite_note-How_the_Curie_Came_to_Be-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> and is in later literature considered to be named for both.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>It was originally defined as "the quantity or mass of <a href="/wiki/Radon" title="Radon">radium emanation</a> in equilibrium with one gram of <a href="/wiki/Radium" title="Radium">radium</a> (element)",<sup id="cite_ref-Nature1910_1-1" class="reference"><a href="#cite_note-Nature1910-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> but is currently defined as 1 Ci = <span class="nowrap"><span data-sort-value="7010370000000000000♠"></span>3.7<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>10</sup></span> <a href="/wiki/Radioactive_decay" title="Radioactive decay">decays</a> per <a href="/wiki/Second" title="Second">second</a><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> after more accurate measurements of the activity of <sup>226</sup>Ra (which has a specific activity of <span class="nowrap"><span data-sort-value="7013366000000000000♠"></span>3.66<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>10</sup> Bq/g</span><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>). </p><p>In 1975 the <a href="/wiki/General_Conference_on_Weights_and_Measures" title="General Conference on Weights and Measures">General Conference on Weights and Measures</a> gave the <a href="/wiki/Becquerel" title="Becquerel">becquerel</a> (Bq), defined as one nuclear decay per second, official status as the <a href="/wiki/International_System_of_Units" title="International System of Units">SI unit</a> of activity.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Therefore: </p> <dl><dd>1 Ci = <span class="nowrap"><span data-sort-value="7010370000000000000♠"></span>3.7<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>10</sup> Bq</span> = 37 GBq</dd></dl> <p>and </p> <dl><dd>1 Bq ≅ <span class="nowrap"><span data-sort-value="7000100010999999999♠"></span>2.703<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−11</sup> Ci</span> ≅ 27 pCi</dd></dl> <p>While its continued use is discouraged by the <a href="/wiki/National_Institute_of_Standards_and_Technology" title="National Institute of Standards and Technology">National Institute of Standards and Technology</a> (NIST)<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> and other bodies, the curie is still widely used throughout government, industry and medicine in the United States and in other countries. </p><p>At the 1910 meeting, which originally defined the curie, it was proposed to make it equivalent to 10 <a href="/wiki/Nanogram" class="mw-redirect" title="Nanogram">nanograms</a> of radium (a practical amount). But Marie Curie, after initially accepting this, changed her mind and insisted on one gram of radium. According to Bertram Boltwood, Marie Curie thought that "the use of the name 'curie' for so infinitesimally small [a] quantity of anything was altogether inappropriate".<sup id="cite_ref-How_the_Curie_Came_to_Be_2-1" class="reference"><a href="#cite_note-How_the_Curie_Came_to_Be-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>The power emitted in radioactive decay corresponding to one curie can be calculated by multiplying the <a href="/wiki/Decay_energy" title="Decay energy">decay energy</a> by approximately 5.93 <a href="/wiki/Milliwatt" class="mw-redirect" title="Milliwatt">mW</a> / <a href="/wiki/MeV" class="mw-redirect" title="MeV">MeV</a>. </p><p>A <a href="/wiki/Radiotherapy" class="mw-redirect" title="Radiotherapy">radiotherapy</a> machine may have roughly 1000 Ci of a radioisotope such as <a href="/wiki/Caesium-137" title="Caesium-137">caesium-137</a> or <a href="/wiki/Cobalt-60" title="Cobalt-60">cobalt-60</a>. This quantity of radioactivity can produce serious health effects with only a few minutes of close-range, unshielded exposure. </p><p>Radioactive decay can lead to the emission of particulate radiation or electromagnetic radiation. Ingesting even small quantities of some particulate emitting radionuclides may be fatal. For example, the <a href="/wiki/Median_lethal_dose" title="Median lethal dose">median lethal dose</a> (LD-50) for ingested <a href="/wiki/Polonium" title="Polonium">polonium</a>-210 is 240 μCi; about 53.5 nanograms. </p><p>The typical human body contains roughly 0.1 μCi (14 mg) of naturally occurring <a href="/wiki/Potassium-40" title="Potassium-40">potassium-40</a>. A human body containing 16 kg (35 lb) of carbon (see <i><a href="/wiki/Composition_of_the_human_body" title="Composition of the human body">Composition of the human body</a></i>) would also have about 24 nanograms or 0.1 μCi of <a href="/wiki/Carbon-14" title="Carbon-14">carbon-14</a>. Together, these would result in a total of approximately 0.2 μCi or 7400 decays per second inside the person's body (mostly from beta decay but some from gamma decay). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="As_a_measure_of_quantity">As a measure of quantity</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Curie_(unit)&action=edit&section=1" title="Edit section: As a measure of quantity"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Units of activity (the curie and the becquerel) also refer to a quantity of radioactive atoms. Because the probability of decay is a fixed physical quantity, for a known number of atoms of a particular <a href="/wiki/Radionuclide" title="Radionuclide">radionuclide</a>, a predictable number will decay in a given time. The number of decays that will occur in one second in one gram of atoms of a particular radionuclide is known as the <a href="/wiki/Specific_activity" title="Specific activity">specific activity</a> of that radionuclide. </p><p>The activity of a sample decreases with time because of decay. </p><p>The rules of <a href="/wiki/Radioactive_decay" title="Radioactive decay">radioactive decay</a> may be used to convert activity to an actual number of atoms. They state that 1 Ci of radioactive atoms would follow the expression </p> <dl><dd><i>N</i> (atoms) × <i>λ</i> (s<sup>−1</sup>) = 1 Ci = 3.7 × 10<sup>10</sup> Bq,</dd></dl> <p>and so </p> <dl><dd><i>N</i> = 3.7 × 10<sup>10</sup> Bq / <i>λ</i>,</dd></dl> <p>where <i>λ</i> is the <a href="/wiki/Exponential_decay" title="Exponential decay">decay constant</a> in s<sup>−1</sup>. </p><p>Here are some examples, ordered by half-life: </p> <table class="wikitable"> <tbody><tr> <th>Nuclide</th> <th><a href="/wiki/Atomic_mass" title="Atomic mass">Isotopic mass</a> (<a href="/wiki/Dalton_(unit)" title="Dalton (unit)">Da</a>)<sup id="cite_ref-AME2020_II_8-0" class="reference"><a href="#cite_note-AME2020_II-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup></th> <th>Number of atoms in 1 gram</th> <th>Half-life<sup id="cite_ref-NUBASE2020_9-0" class="reference"><a href="#cite_note-NUBASE2020-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup></th> <th>Specific activity (Ci/g)</th> <th>Mass of 1 curie </th></tr> <tr> <td><a href="/wiki/Bismuth-209" title="Bismuth-209"><sup>209</sup>Bi</a></td> <td>208.9803986</td> <td>2.8816773×10<sup>21</sup></td> <td>2.01×10<sup>19</sup> years</td> <td>8.51×10<sup>−17</sup></td> <td>11.7 billion tonnes </td></tr> <tr> <td><a href="/wiki/Platinum-190" class="mw-redirect" title="Platinum-190"><sup>190</sup>Pt</a></td> <td>189.9599498</td> <td>3.1702160×10<sup>21</sup></td> <td>4.83×10<sup>11</sup> years</td> <td>3.90×10<sup>−9</sup></td> <td>257 tonnes </td></tr> <tr> <td><a href="/wiki/Samarium-147" title="Samarium-147"><sup>147</sup>Sm</a></td> <td>146.9149044</td> <td>4.0990673×10<sup>21</sup></td> <td>1.066×10<sup>11</sup> years</td> <td>2.28×10<sup>−8</sup></td> <td>43.8 tonnes </td></tr> <tr> <td><a href="/wiki/Thorium-232" title="Thorium-232"><sup>232</sup>Th</a></td> <td>232.0380536</td> <td>2.5953246×10<sup>21</sup></td> <td>1.405×10<sup>10</sup> years</td> <td>1.10×10<sup>−7</sup> (0.110 μCi/g)</td> <td>9.12 tonnes </td></tr> <tr> <td><a href="/wiki/Uranium-238" title="Uranium-238"><sup>238</sup>U</a></td> <td>238.0507876</td> <td>2.5297714×10<sup>21</sup></td> <td>4.468×10<sup>9</sup> years</td> <td>3.36×10<sup>−7</sup> (0.336 μCi/g)</td> <td>2.98 tonnes </td></tr> <tr> <td><a href="/wiki/Potassium-40" title="Potassium-40"><sup>40</sup>K</a></td> <td>39.96399817</td> <td>1.50689146×10<sup>22</sup></td> <td>1.248×10<sup>9</sup> years</td> <td>7.18×10<sup>−6</sup> (7.17 μCi/g)</td> <td>140 kg </td></tr> <tr> <td><a href="/wiki/Uranium-235" title="Uranium-235"><sup>235</sup>U</a></td> <td>235.0439281</td> <td>2.5621342×10<sup>21</sup></td> <td>7.038×10<sup>8</sup> years</td> <td>2.16×10<sup>−6</sup> (2.16 μCi/g)</td> <td>463 kg </td></tr> <tr> <td><a href="/wiki/Iodine-129" title="Iodine-129"><sup>129</sup>I</a></td> <td>128.9049836</td> <td>4.6717672×10<sup>21</sup></td> <td>1.614×10<sup>7</sup> years</td> <td>1.72×10<sup>−4</sup> (172 μCi/g)</td> <td>5.82 kg </td></tr> <tr> <td><a href="/wiki/Technetium-99" title="Technetium-99"><sup>99</sup>Tc</a></td> <td>98.90624968</td> <td>6.0887363×10<sup>21</sup></td> <td>2.111×10<sup>5</sup> years</td> <td>1.71×10<sup>−4</sup></td> <td>58.4 g </td></tr> <tr> <td><a href="/wiki/Plutonium-239" title="Plutonium-239"><sup>239</sup>Pu</a></td> <td>239.0521616</td> <td>2.5191744×10<sup>21</sup></td> <td>2.411×10<sup>4</sup> years</td> <td>6.20×10<sup>−2</sup></td> <td>16.1 g </td></tr> <tr> <td><a href="/wiki/Plutonium-240" title="Plutonium-240"><sup>240</sup>Pu</a></td> <td>240.0538117</td> <td>2.5086628×10<sup>21</sup></td> <td>6561 years</td> <td>0.227</td> <td>4.41 g </td></tr> <tr> <td><a href="/wiki/Carbon-14" title="Carbon-14"><sup>14</sup>C</a></td> <td>14.00324199</td> <td>4.30053323×10<sup>22</sup></td> <td>5700 years</td> <td>4.48</td> <td>223 mg </td></tr> <tr> <td><a href="/wiki/Radium-226" title="Radium-226"><sup>226</sup>Ra</a></td> <td>226.0254082</td> <td>2.6643645×10<sup>21</sup></td> <td>1600 years</td> <td>0.989</td> <td>1.01 g </td></tr> <tr> <td><a href="/wiki/Americium-241" title="Americium-241"><sup>241</sup>Am</a></td> <td>241.0568273</td> <td>2.4982245×10<sup>21</sup></td> <td>432.6 years</td> <td>3.43</td> <td>292 mg </td></tr> <tr> <td><a href="/wiki/Plutonium-238" title="Plutonium-238"><sup>238</sup>Pu</a></td> <td>238.0495582</td> <td>2.5297845×10<sup>21</sup></td> <td>87.7 years</td> <td>17.1</td> <td>58.4 mg </td></tr> <tr> <td><a href="/wiki/Caesium-137" title="Caesium-137"><sup>137</sup>Cs</a></td> <td>136.9070893</td> <td>4.3987063×10<sup>21</sup></td> <td>30.04 years</td> <td>86.9</td> <td>11.5 mg </td></tr> <tr> <td><a href="/wiki/Strontium-90" title="Strontium-90"><sup>90</sup>Sr</a></td> <td>89.9077279</td> <td>6.6981347×10<sup>21</sup></td> <td>28.91 years</td> <td>138</td> <td>7.27 mg </td></tr> <tr> <td><a href="/wiki/Plutonium-241" title="Plutonium-241"><sup>241</sup>Pu</a></td> <td>241.0568497</td> <td>2.4982243×10<sup>21</sup></td> <td>14.329 years</td> <td>104</td> <td>9.66 mg </td></tr> <tr> <td><a href="/wiki/Tritium" title="Tritium"><sup>3</sup>H</a></td> <td>3.016049281320</td> <td>1.996698393×10<sup>23</sup></td> <td>12.32 years</td> <td>9.62×10<sup>3</sup></td> <td>104 μg </td></tr> <tr> <td><a href="/wiki/Radium-228" class="mw-redirect" title="Radium-228"><sup>228</sup>Ra</a></td> <td>228.0310686</td> <td>2.6409299×10<sup>21</sup></td> <td>5.75 years</td> <td>273</td> <td>3.67 mg </td></tr> <tr> <td><a href="/wiki/Cobalt-60" title="Cobalt-60"><sup>60</sup>Co</a></td> <td>59.93381554</td> <td>1.00479849×10<sup>22</sup></td> <td>5.2714 years</td> <td>1.13×10<sup>3</sup></td> <td>884 μg </td></tr> <tr> <td><a href="/wiki/Polonium-210" title="Polonium-210"><sup>210</sup>Po</a></td> <td>209.9828737</td> <td>2.8679200×10<sup>21</sup></td> <td>138.376 days</td> <td>4.49×10<sup>3</sup></td> <td>223 μg </td></tr> <tr> <td><a href="/wiki/Iodine-131" title="Iodine-131"><sup>131</sup>I</a></td> <td>130.9061264</td> <td>4.6003506×10<sup>21</sup></td> <td>8.0249 days</td> <td>1.24×10<sup>5</sup></td> <td>8.05 μg </td></tr> <tr> <td><a href="/wiki/Iodine-123" title="Iodine-123"><sup>123</sup>I</a></td> <td>122.9055898</td> <td>4.8998103×10<sup>21</sup></td> <td>13.2232 hours</td> <td>1.93×10<sup>6</sup></td> <td>519 ng </td></tr> <tr> <td><a href="/wiki/Lead-212" class="mw-redirect" title="Lead-212"><sup>212</sup>Pb</a></td> <td>211.9918959</td> <td>2.8407410×10<sup>21</sup></td> <td>10.627 hours</td> <td>1.39×10<sup>6</sup></td> <td>719 ng </td></tr> <tr> <td><a href="/wiki/Francium-223" class="mw-redirect" title="Francium-223"><sup>223</sup>Fr</a></td> <td>223.0197342</td> <td>2.7002726×10<sup>21</sup></td> <td>22.00 minutes</td> <td>3.83×10<sup>7</sup></td> <td>26.1 ng </td></tr> <tr> <td><a href="/wiki/Polonium-212" class="mw-redirect" title="Polonium-212"><sup>212</sup>Po</a></td> <td>211.9888680</td> <td>2.8407816×10<sup>21</sup></td> <td>294.4 nanoseconds</td> <td>1.81×10<sup>17</sup></td> <td>5.53 ag </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Radiation_related_quantities">Radiation related quantities</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Curie_(unit)&action=edit&section=2" title="Edit section: Radiation related quantities"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The following table shows radiation quantities in SI and non-SI units: </p> <table class="wikitable sortable"> <caption>Ionizing radiation related quantities <style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist"><ul><li class="nv-view"><a href="/wiki/Template:Radiation_related_quantities" title="Template:Radiation related quantities"><span title="View this template">view</span></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Radiation_related_quantities" title="Template talk:Radiation related quantities"><span title="Discuss this template">talk</span></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Radiation_related_quantities" title="Special:EditPage/Template:Radiation related quantities"><span title="Edit this template">edit</span></a></li></ul></div> </caption> <tbody><tr> <th>Quantity </th> <th>Unit </th> <th>Symbol </th> <th>Derivation </th> <th>Year </th> <th><a href="/wiki/International_System_of_Units" title="International System of Units">SI</a> equivalent </th></tr> <tr> <td rowspan="3"><a href="/wiki/Specific_activity" title="Specific activity">Activity</a> (<i>A</i>) </td> <td><a href="/wiki/Becquerel" title="Becquerel">becquerel</a> </td> <td>Bq </td> <td>s<sup>−1</sup> </td> <td>1974 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">SI unit </td></tr> <tr> <td><a class="mw-selflink selflink">curie</a> </td> <td>Ci </td> <td><span class="nowrap"><span data-sort-value="7010370000000000000♠"></span>3.7<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>10</sup> s<sup>−1</sup></span> </td> <td>1953 </td> <td>3.7<span style="margin:0 .15em 0 .25em">×</span>10<sup>10</sup> Bq </td></tr> <tr> <td><a href="/wiki/Rutherford_(unit)" title="Rutherford (unit)">rutherford</a> </td> <td>Rd </td> <td>10<sup>6</sup> s<sup>−1</sup> </td> <td>1946 </td> <td><span style="white-space: nowrap">1<span style="margin-left: 0.25em">000</span><span style="margin-left: 0.25em">000</span></span> Bq </td></tr> <tr> <td rowspan="2"><a href="/wiki/Radiation_exposure" title="Radiation exposure">Exposure</a> (<i>X</i>) </td> <td><a href="/wiki/Coulomb" title="Coulomb">coulomb</a> per <a href="/wiki/Kilogram" title="Kilogram">kilogram</a> </td> <td>C/kg </td> <td>C⋅kg<sup>−1</sup> of air </td> <td>1974 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">SI unit </td></tr> <tr> <td><a href="/wiki/Roentgen_(unit)" title="Roentgen (unit)">röntgen</a> </td> <td>R </td> <td><a href="/wiki/Statcoulomb" title="Statcoulomb">esu</a> / <span class="nowrap"><span data-sort-value="6994129300000000000♠"></span>0.001<span style="margin-left:.25em;">293</span> g</span> of air </td> <td>1928 </td> <td><span class="nowrap"><span data-sort-value="6996258000000000000♠"></span>2.58<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−4</sup> C/kg</span> </td></tr> <tr> <td rowspan="3"><a href="/wiki/Absorbed_dose" title="Absorbed dose">Absorbed dose</a> (<i>D</i>) </td> <td><a href="/wiki/Gray_(unit)" title="Gray (unit)">gray</a> </td> <td>Gy </td> <td><a href="/wiki/Joule" title="Joule">J</a>⋅kg<sup>−1</sup> </td> <td>1974 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">SI unit </td></tr> <tr> <td><a href="/wiki/Erg" title="Erg">erg</a> per gram </td> <td>erg/g </td> <td>erg⋅g<sup>−1</sup> </td> <td>1950 </td> <td><span class="nowrap"><span data-sort-value="6996100000000000000♠"></span>1.0<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−4</sup> Gy</span> </td></tr> <tr> <td><a href="/wiki/Rad_(unit)" class="mw-redirect" title="Rad (unit)">rad</a> </td> <td>rad </td> <td>100 erg⋅g<sup>−1</sup> </td> <td>1953 </td> <td>0.010 Gy </td></tr> <tr> <td rowspan="2"><a href="/wiki/Equivalent_dose" title="Equivalent dose">Equivalent dose</a> (<i>H</i>) </td> <td><a href="/wiki/Sievert" title="Sievert">sievert</a> </td> <td>Sv </td> <td>J⋅kg<sup>−1</sup> × <a href="/wiki/Sievert#Calculating_protection_dose_quantities" title="Sievert"><i>W</i><sub><i>R</i></sub></a> </td> <td>1977 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">SI unit </td></tr> <tr> <td><a href="/wiki/Roentgen_equivalent_man" title="Roentgen equivalent man">röntgen equivalent man</a> </td> <td>rem </td> <td>100 erg⋅g<sup>−1</sup> × <a href="/wiki/Sievert#Calculating_protection_dose_quantities" title="Sievert"><i>W</i><sub><i>R</i></sub></a> </td> <td>1971 </td> <td>0.010 Sv </td></tr> <tr> <td rowspan="2"><a href="/wiki/Effective_dose_(radiation)" title="Effective dose (radiation)">Effective dose</a> (<i>E</i>) </td> <td><a href="/wiki/Sievert" title="Sievert">sievert</a> </td> <td>Sv </td> <td>J⋅kg<sup>−1</sup> × <a href="/wiki/Sievert#Calculating_protection_dose_quantities" title="Sievert"><i>W</i><sub><i>R</i></sub> × <i>W</i><sub><i>T</i></sub></a> </td> <td>1977 </td> <td data-sort-value="" style="background: var(--background-color-interactive, #ececec); color: var(--color-base, inherit); vertical-align: middle; text-align: center;" class="table-na">SI unit </td></tr> <tr> <td><a href="/wiki/Roentgen_equivalent_man" title="Roentgen equivalent man">röntgen equivalent man</a> </td> <td>rem </td> <td>100 erg⋅g<sup>−1</sup> × <a href="/wiki/Sievert#Calculating_protection_dose_quantities" title="Sievert"><i>W</i><sub><i>R</i></sub> × <i>W</i><sub><i>T</i></sub></a> </td> <td>1971 </td> <td>0.010 Sv </td></tr> </tbody></table> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Curie_(unit)&action=edit&section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Geiger_counter" title="Geiger counter">Geiger counter</a></li> <li><a href="/wiki/Ionizing_radiation" title="Ionizing radiation">Ionizing radiation</a></li> <li><a href="/wiki/Radiation_burn" title="Radiation burn">Radiation burn</a></li> <li><a href="/wiki/Radiation_exposure_(disambiguation)" class="mw-disambig" title="Radiation exposure (disambiguation)">Radiation exposure</a></li> <li><a href="/wiki/Radiation_poisoning" class="mw-redirect" title="Radiation poisoning">Radiation poisoning</a></li> <li><a href="/wiki/United_Nations_Scientific_Committee_on_the_Effects_of_Atomic_Radiation" title="United Nations Scientific Committee on the Effects of Atomic Radiation">United Nations Scientific Committee on the Effects of Atomic Radiation</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Curie_(unit)&action=edit&section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-Nature1910-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-Nature1910_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Nature1910_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFRutherford1910" class="citation journal cs1">Rutherford, Ernest (6 October 1910). <a rel="nofollow" class="external text" href="https://archive.org/stream/nature841910lock/nature841910lock_djvu.txt">"Radium Standards and Nomenclature"</a>. <i>Nature</i>. <b>84</b> (2136): <span class="nowrap">430–</span>431. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/1910Natur..84..430R">1910Natur..84..430R</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1038%2F084430a0">10.1038/084430a0</a></span>.</cite><span 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Retrieved <span class="nowrap">3 July</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Health+Physics+Society+Newsletter&rft.atitle=How+the+Curie+Came+to+Be&rft.date=1996&rft.aulast=Frame&rft.aufirst=Paul&rft_id=http%3A%2F%2Fwww.orau.org%2Fptp%2Farticlesstories%2Fthecurie.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACurie+%28unit%29" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFUnited_States_Atomic_Energy_Commission1951" class="citation book cs1"><a href="/wiki/United_States_Atomic_Energy_Commission" title="United States Atomic Energy Commission">United States Atomic Energy Commission</a> (1951). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=7fUrAAAAIAAJ&pg=RA5-PA93"><i>Semiannual Report of the Atomic Energy Commission, Volume 9</i></a>. p. 93.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Semiannual+Report+of+the+Atomic+Energy+Commission%2C+Volume+9&rft.pages=93&rft.date=1951&rft.au=United+States+Atomic+Energy+Commission&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D7fUrAAAAIAAJ%26pg%3DRA5-PA93&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACurie+%28unit%29" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20210219084448/https://www.bipm.org/en/CGPM/db/12/7">"Resolution 7 of the 12th CGPM"</a>. <a href="/wiki/International_Bureau_of_Weights_and_Measures" title="International Bureau of Weights and Measures">International Bureau of Weights and Measures</a> (BIPM). 1964. 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(2002). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160305114238/http://rpd.oxfordjournals.org/content/98/1/1">"Radionuclide and Radiation Protection Data Handbook 2002"</a>. <i>Radiation Protection Dosimetry</i>. <b>98</b> (1). Nuclear Technology Publishing: 147. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1093%2Foxfordjournals.rpd.a006705">10.1093/oxfordjournals.rpd.a006705</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/11916063">11916063</a>. Archived from <a rel="nofollow" class="external text" href="http://rpd.oxfordjournals.org/content/98/1/1">the original</a> on 2016-03-05.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Radiation+Protection+Dosimetry&rft.atitle=Radionuclide+and+Radiation+Protection+Data+Handbook+2002&rft.volume=98&rft.issue=1&rft.pages=147&rft.date=2002&rft_id=info%3Adoi%2F10.1093%2Foxfordjournals.rpd.a006705&rft_id=info%3Apmid%2F11916063&rft.aulast=Delacroix&rft.aufirst=D.&rft_id=http%3A%2F%2Frpd.oxfordjournals.org%2Fcontent%2F98%2F1%2F1&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACurie+%28unit%29" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation journal cs1"><a rel="nofollow" class="external text" href="http://www.bipm.org/en/CGPM/db/15/8/">"SI units for ionizing radiation: becquerel"</a>. <i>Resolutions of the 15th CGPM</i> (Resolution 8). 1975<span class="reference-accessdate">. Retrieved <span class="nowrap">3 July</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Resolutions+of+the+15th+CGPM&rft.atitle=SI+units+for+ionizing+radiation%3A+becquerel&rft.issue=Resolution+8&rft.date=1975&rft_id=http%3A%2F%2Fwww.bipm.org%2Fen%2FCGPM%2Fdb%2F15%2F8%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACurie+%28unit%29" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation report cs1"><a rel="nofollow" class="external text" href="https://www.nist.gov/pml/pubs/sp811/sec05.cfm#52">NIST Special Publication 811, paragraph 5.2</a> (Report). NIST. 28 January 2016<span class="reference-accessdate">. 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Tables, graphs and references". <i>Chinese Physics C</i>. <b>45</b> (3): 030003. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1088%2F1674-1137%2Fabddaf">10.1088/1674-1137/abddaf</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Chinese+Physics+C&rft.atitle=The+AME+2020+atomic+mass+evaluation+%28II%29.+Tables%2C+graphs+and+references&rft.volume=45&rft.issue=3&rft.pages=030003&rft.date=2021&rft_id=info%3Adoi%2F10.1088%2F1674-1137%2Fabddaf&rft.aulast=Wang&rft.aufirst=Meng&rft.au=Huang%2C+W.J.&rft.au=Kondev%2C+F.G.&rft.au=Audi%2C+G.&rft.au=Naimi%2C+S.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACurie+%28unit%29" class="Z3988"></span> </span> </li> <li id="cite_note-NUBASE2020-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-NUBASE2020_9-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFKondevWangHuangNaimi2021" class="citation journal cs1">Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). <a rel="nofollow" class="external text" href="https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf">"The NUBASE2020 evaluation of nuclear properties"</a> <span class="cs1-format">(PDF)</span>. <i>Chinese Physics C</i>. <b>45</b> (3): 030001. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1088%2F1674-1137%2Fabddae">10.1088/1674-1137/abddae</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Chinese+Physics+C&rft.atitle=The+NUBASE2020+evaluation+of+nuclear+properties&rft.volume=45&rft.issue=3&rft.pages=030001&rft.date=2021&rft_id=info%3Adoi%2F10.1088%2F1674-1137%2Fabddae&rft.aulast=Kondev&rft.aufirst=F.+G.&rft.au=Wang%2C+M.&rft.au=Huang%2C+W.+J.&rft.au=Naimi%2C+S.&rft.au=Audi%2C+G.&rft_id=https%3A%2F%2Fwww-nds.iaea.org%2Famdc%2Fame2020%2FNUBASE2020.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ACurie+%28unit%29" class="Z3988"></span> </span> </li> </ol></div></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626" /><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text">Note that NUBASE2020 uses the <em>tropical</em> year to convert between years and other units of time, not the <a href="/wiki/Gregorian_year" class="mw-redirect" title="Gregorian year">Gregorian year</a>. The relationship between years and other time units in NUBASE2020 is as follows: <span class="nowrap">1 y = 365.2422 d = 31 556 926 s</span> </span> </li> </ol></div></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output 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href="/wiki/Template:Marie_and_Pierre_Curie" title="Template:Marie and Pierre Curie"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Marie_and_Pierre_Curie" title="Template talk:Marie and Pierre Curie"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Marie_and_Pierre_Curie" title="Special:EditPage/Template:Marie and Pierre Curie"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Marie_and_Pierre_Curie129" style="font-size:114%;margin:0 4em"><a href="/wiki/Marie_Curie" title="Marie Curie"> Marie</a> and <a href="/wiki/Pierre_Curie" title="Pierre Curie"> Pierre</a> Curie</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Discoveries</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Curie%27s_law" title="Curie's law">Curie's law</a></li> <li><a href="/wiki/Curie%E2%80%93Weiss_law" title="Curie–Weiss law">Curie–Weiss law</a></li> <li><a href="/wiki/Curie_temperature" title="Curie temperature">Curie temperature</a></li> <li><a href="/wiki/Mean-field_theory" title="Mean-field theory">Mean-field theory</a></li> <li><a href="/wiki/Piezoelectricity" title="Piezoelectricity">Piezoelectricity</a></li> <li><a href="/wiki/Polonium" title="Polonium">Polonium</a></li> <li><a href="/wiki/Radioactive_decay" title="Radioactive decay">Radioactivity</a></li> <li><a href="/wiki/Radium" title="Radium">Radium</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Publications</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Curie%27s_principle" title="Curie's principle">Curie's principle</a></li> <li><i><a href="/wiki/Treatise_on_Radioactivity" title="Treatise on Radioactivity">Treatise on Radioactivity</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Museums</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Maria_Sk%C5%82odowska-Curie_Museum" title="Maria Skłodowska-Curie Museum">Maria Skłodowska-Curie Museum</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Curie_family" title="Curie family">Family</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ir%C3%A8ne_Joliot-Curie" title="Irène Joliot-Curie">Irène Joliot-Curie</a> (daughter)</li> <li><a href="/wiki/%C3%88ve_Curie" title="Ève Curie">Ève Curie</a> (daughter)</li> <li><a href="/wiki/H%C3%A9l%C3%A8ne_Langevin-Joliot" title="Hélène Langevin-Joliot">Hélène Langevin-Joliot</a> (granddaughter)</li> <li><a href="/wiki/Pierre_Joliot" title="Pierre Joliot">Pierre Joliot</a> (grandson)</li> <li><a href="/wiki/Jacques_Curie" title="Jacques Curie">Jacques Curie</a> (Pierre's brother)</li> <li><a href="/wiki/Fr%C3%A9d%C3%A9ric_Joliot-Curie" title="Frédéric Joliot-Curie">Frédéric Joliot-Curie</a> (son-in-law)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Namesakes</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Curie_Institute_(Paris)" title="Curie Institute (Paris)">Curie Institute</a></li> <li><a class="mw-selflink selflink">Curie</a></li> <li><a href="/wiki/Curium" title="Curium">Curium</a></li> <li><a href="/wiki/IEEE_Marie_Sklodowska-Curie_Award" title="IEEE Marie Sklodowska-Curie Award">IEEE Marie Sklodowska-Curie Award</a></li> <li><a href="/wiki/Marie_Curie_Medal" title="Marie Curie Medal">Marie Curie Medal</a></li> <li><a href="/wiki/Maria_Sk%C5%82odowska-Curie_Bridge,_Warsaw" title="Maria Skłodowska-Curie Bridge, Warsaw">Maria Skłodowska-Curie Bridge</a></li> <li><a href="/wiki/Maria_Sk%C5%82odowska-Curie_Park" title="Maria Skłodowska-Curie Park">Maria Skłodowska-Curie Park</a></li> <li><a href="/wiki/Maria_Curie-Sk%C5%82odowska_University" title="Maria Curie-Skłodowska University">Maria Curie-Skłodowska University</a></li> <li><a href="/wiki/Pierre_and_Marie_Curie_University" title="Pierre and Marie Curie University">Pierre and Marie Curie University</a></li> <li><a href="/wiki/Maria_Sk%C5%82odowska-Curie_National_Research_Institute_of_Oncology" title="Maria Skłodowska-Curie National Research Institute of Oncology">Maria Skłodowska-Curie National Research Institute of Oncology</a></li> <li><a href="/wiki/Curie_Island" title="Curie Island">Curie Island</a></li> <li><a href="/wiki/7000_Curie" class="mw-redirect" title="7000 Curie">7000 Curie</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Depictions</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Maria_Sk%C5%82odowska-Curie_Monument_(Lublin)" title="Maria Skłodowska-Curie Monument (Lublin)">Maria Skłodowska-Curie Monument in Lublin</a></li> <li><a href="/wiki/Maria_Sk%C5%82odowska-Curie_Monument_(Downtown,_Warsaw)" title="Maria Skłodowska-Curie Monument (Downtown, Warsaw)">Maria Skłodowska-Curie Monument in Warsaw (Downtown)</a></li> <li><a href="/wiki/Maria_Sk%C5%82odowska-Curie_Monument_(Ochota)" title="Maria Skłodowska-Curie Monument (Ochota)">Maria Skłodowska-Curie Monument in Warsaw (Ochota)</a></li> <li><i><a href="/wiki/Marie_Curie_Gargoyle" title="Marie Curie Gargoyle">Marie Curie Gargoyle</a></i></li> <li><i><a href="/wiki/Maria_Sk%C5%82odowska-Curie_Medallion" title="Maria Skłodowska-Curie Medallion">Maria Skłodowska-Curie Medallion</a></i></li> <li><i><a href="/wiki/Madame_Curie_(film)" title="Madame Curie (film)">Madame Curie</a></i> (1943 film)</li> <li><i><a href="/wiki/Les_Palmes_de_M._Schutz" title="Les Palmes de M. Schutz">Les Palmes de M. Schutz</a></i> (1997 film)</li> <li><i><a href="/wiki/Marie_Curie,_une_femme_sur_le_front" title="Marie Curie, une femme sur le front">Marie Curie, une femme sur le front</a></i> (2014 film)</li> <li><i><a href="/wiki/Marie_Curie:_The_Courage_of_Knowledge" title="Marie Curie: The Courage of Knowledge">Marie Curie: The Courage of Knowledge</a></i> (2016 film)</li> <li><i><a href="/wiki/Radioactive_(film)" title="Radioactive (film)">Radioactive</a></i> (2019 film)</li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235" /></div><div role="navigation" class="navbox" aria-labelledby="Scientists_whose_names_are_used_as_units531" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Scientists_whose_names_are_used_as_units" title="Template:Scientists whose names are used as units"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Scientists_whose_names_are_used_as_units" title="Template talk:Scientists whose names are used as units"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Scientists_whose_names_are_used_as_units" title="Special:EditPage/Template:Scientists whose names are used as units"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Scientists_whose_names_are_used_as_units531" style="font-size:114%;margin:0 4em">Scientists whose names are used as units</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">SI base units</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Andr%C3%A9-Marie_Amp%C3%A8re" title="André-Marie Ampère">André-Marie Ampère</a> (<a href="/wiki/Ampere" title="Ampere">ampere</a>)</li> <li><a href="/wiki/Lord_Kelvin" title="Lord Kelvin">Lord Kelvin</a> (<a href="/wiki/Kelvin" title="Kelvin">kelvin</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">SI derived units</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Henri_Becquerel" title="Henri Becquerel">Henri Becquerel</a> (<a href="/wiki/Becquerel" title="Becquerel">becquerel</a>)</li> <li><a href="/wiki/Anders_Celsius" title="Anders Celsius">Anders Celsius</a> (degree <a href="/wiki/Celsius" title="Celsius">Celsius</a>)</li> <li><a href="/wiki/Charles-Augustin_de_Coulomb" title="Charles-Augustin de Coulomb">Charles-Augustin de Coulomb</a> (<a href="/wiki/Coulomb" title="Coulomb">coulomb</a>)</li> <li><a href="/wiki/Michael_Faraday" title="Michael Faraday">Michael Faraday</a> (<a href="/wiki/Farad" title="Farad">farad</a>)</li> <li><a href="/wiki/Louis_Harold_Gray" title="Louis Harold Gray">Louis Harold Gray</a> (<a href="/wiki/Gray_(unit)" title="Gray (unit)">gray</a>)</li> <li><a href="/wiki/Joseph_Henry" title="Joseph Henry">Joseph Henry</a> (<a href="/wiki/Henry_(unit)" title="Henry (unit)">henry</a>)</li> <li><a href="/wiki/Heinrich_Hertz" title="Heinrich Hertz">Heinrich Hertz</a> (<a href="/wiki/Hertz" title="Hertz">hertz</a>)</li> <li><a href="/wiki/James_Prescott_Joule" title="James Prescott Joule">James Prescott Joule</a> (<a href="/wiki/Joule" title="Joule">joule</a>)</li> <li><a href="/wiki/Isaac_Newton" title="Isaac Newton">Isaac Newton</a> (<a href="/wiki/Newton_(unit)" title="Newton (unit)">newton</a>)</li> <li><a href="/wiki/Georg_Ohm" title="Georg Ohm">Georg Ohm</a> (<a href="/wiki/Ohm" title="Ohm">ohm</a>)</li> <li><a href="/wiki/Blaise_Pascal" title="Blaise Pascal">Blaise Pascal</a> (<a href="/wiki/Pascal_(unit)" title="Pascal (unit)">pascal</a>)</li> <li><a href="/wiki/Werner_von_Siemens" title="Werner von Siemens">Werner von Siemens</a> (<a href="/wiki/Siemens_(unit)" title="Siemens (unit)">siemens</a>)</li> <li><a href="/wiki/Rolf_Maximilian_Sievert" title="Rolf Maximilian Sievert">Rolf Maximilian Sievert</a> (<a href="/wiki/Sievert" title="Sievert">sievert</a>)</li> <li><a href="/wiki/Nikola_Tesla" title="Nikola Tesla">Nikola Tesla</a> (<a href="/wiki/Tesla_(unit)" title="Tesla (unit)">tesla</a>)</li> <li><a href="/wiki/Alessandro_Volta" title="Alessandro Volta">Alessandro Volta</a> (<a href="/wiki/Volt" title="Volt">volt</a>)</li> <li><a href="/wiki/James_Watt" title="James Watt">James Watt</a> (<a href="/wiki/Watt" title="Watt">watt</a>)</li> <li><a href="/wiki/Wilhelm_Eduard_Weber" title="Wilhelm Eduard Weber">Wilhelm Eduard Weber</a> (<a href="/wiki/Weber_(unit)" title="Weber (unit)">weber</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Non-SI metric (<a href="/wiki/Centimetre%E2%80%93gram%E2%80%93second_system_of_units" title="Centimetre–gram–second system of units">cgs</a>) units</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anders_Jonas_%C3%85ngstr%C3%B6m" title="Anders Jonas Ångström">Anders Jonas Ångström</a> (<a href="/wiki/Angstrom" title="Angstrom">angstrom</a>)</li> <li><a href="/wiki/Peter_Debye" title="Peter Debye">Peter Debye</a> (<a href="/wiki/Debye" title="Debye">debye</a>)</li> <li><a href="/wiki/Lor%C3%A1nd_E%C3%B6tv%C3%B6s" title="Loránd Eötvös">Loránd Eötvös</a> (<a href="/wiki/Eotvos_(unit)" title="Eotvos (unit)">eotvos</a>)</li> <li><a href="/wiki/Galileo_Galilei" title="Galileo Galilei">Galileo Galilei</a> (<a href="/wiki/Gal_(unit)" title="Gal (unit)">gal</a>)</li> <li><a href="/wiki/Carl_Friedrich_Gauss" title="Carl Friedrich Gauss">Carl Friedrich Gauss</a> (<a href="/wiki/Gauss_(unit)" title="Gauss (unit)">gauss</a>)</li> <li><a href="/wiki/William_Gilbert_(physicist)" title="William Gilbert (physicist)">William Gilbert</a> (<a href="/wiki/Gilbert_(unit)" title="Gilbert (unit)">gilbert</a>)</li> <li><a href="/wiki/Heinrich_Kayser" title="Heinrich Kayser">Heinrich Kayser</a> (<a href="/wiki/Kayser_(unit)" class="mw-redirect" title="Kayser (unit)">kayser</a>)</li> <li><a href="/wiki/Johann_Heinrich_Lambert" title="Johann Heinrich Lambert">Johann Heinrich Lambert</a> (<a href="/wiki/Lambert_(unit)" title="Lambert (unit)">lambert</a>)</li> <li><a href="/wiki/Samuel_Langley" title="Samuel Langley">Samuel Langley</a> (<a href="/wiki/Langley_(unit)" title="Langley (unit)">langley</a>)</li> <li><a href="/wiki/James_Clerk_Maxwell" title="James Clerk Maxwell">James Clerk Maxwell</a> (<a href="/wiki/Maxwell_(unit)" title="Maxwell (unit)">maxwell</a>)</li> <li><a href="/wiki/Hans_Christian_%C3%98rsted" title="Hans Christian Ørsted">Hans Christian Ørsted</a> (<a href="/wiki/Oersted" title="Oersted">oersted</a>)</li> <li><a href="/wiki/Jean_L%C3%A9onard_Marie_Poiseuille" title="Jean Léonard Marie Poiseuille">Jean Léonard Marie Poiseuille</a> (<a href="/wiki/Poise_(unit)" title="Poise (unit)">poise</a>)</li> <li><a href="/wiki/Sir_George_Stokes,_1st_Baronet" title="Sir George Stokes, 1st Baronet">Sir George Stokes, 1st Baronet</a> (<a href="/wiki/Stokes_(unit)" class="mw-redirect" title="Stokes (unit)">stokes</a>)</li> <li><a href="/wiki/John_William_Strutt,_3rd_Baron_Rayleigh" title="John William Strutt, 3rd Baron Rayleigh">John William Strutt, 3rd Baron Rayleigh</a> (<a href="/wiki/Rayl" title="Rayl">rayl</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Imperial_units" title="Imperial units">Imperial</a> and <a href="/wiki/United_States_customary_units" title="United States customary units">US<br /> customary</a> units</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Daniel_Gabriel_Fahrenheit" title="Daniel Gabriel Fahrenheit">Daniel Gabriel Fahrenheit</a> (degree <a href="/wiki/Fahrenheit" title="Fahrenheit">Fahrenheit</a>)</li> <li><a href="/wiki/Johann_Heinrich_Lambert" title="Johann Heinrich Lambert">Johann Heinrich Lambert</a> (<a href="/wiki/Foot-lambert" title="Foot-lambert">foot-lambert</a>)</li> <li><a href="/wiki/Macquorn_Rankine" class="mw-redirect" title="Macquorn Rankine">William John Macquorn Rankine</a> (<a href="/wiki/Rankine_scale" title="Rankine scale">degree Rankine</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Non-systematic units</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alexander_Graham_Bell" title="Alexander Graham Bell">Alexander Graham Bell</a> (<a href="/wiki/Bel_(unit)" class="mw-redirect" title="Bel (unit)">bel/decibel</a>)</li> <li><a href="/wiki/Marie_Curie" title="Marie Curie">Marie Curie</a> & <a href="/wiki/Pierre_Curie" title="Pierre Curie">Pierre Curie</a> (<a class="mw-selflink selflink">curie</a>)</li> <li><a href="/wiki/John_Dalton" title="John Dalton">John Dalton</a> (<a href="/wiki/Dalton_(unit)" title="Dalton (unit)">dalton</a>)</li> <li><a href="/wiki/Michael_Faraday" title="Michael Faraday">Michael Faraday</a> (<a href="/wiki/Faraday_(unit)" class="mw-redirect" title="Faraday (unit)">faraday</a>)</li> <li><a href="/wiki/Heinrich_Mache" title="Heinrich Mache">Heinrich Mache</a> (<a href="/wiki/Mache_(unit)" title="Mache (unit)">mache</a>)</li> <li><a href="/wiki/John_Napier" title="John Napier">John Napier</a> (<a href="/wiki/Neper" title="Neper">neper</a>)</li> <li><a href="/wiki/Ren%C3%A9_Antoine_Ferchault_de_R%C3%A9aumur" title="René Antoine Ferchault de Réaumur">René Antoine Ferchault de Réaumur</a> (<a href="/wiki/R%C3%A9aumur_scale" title="Réaumur scale">degree Réaumur</a>)</li> <li><a href="/wiki/Wilhelm_R%C3%B6ntgen" title="Wilhelm Röntgen">Wilhelm Röntgen</a> (<a href="/wiki/Roentgen_(unit)" title="Roentgen (unit)">roentgen</a>)</li> <li><a href="/wiki/J._J._Thomson" title="J. J. Thomson">J. J. Thomson</a> (<a href="/wiki/Thomson_(unit)" title="Thomson (unit)">thomson</a>)</li> <li><a href="/wiki/Evangelista_Torricelli" title="Evangelista Torricelli">Evangelista Torricelli</a> (<a href="/wiki/Torr" title="Torr">torr</a>)</li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="/wiki/List_of_scientists_whose_names_are_used_as_units" title="List of scientists whose names are used as units">List of scientists whose names are used as units</a> · <a href="/wiki/List_of_scientists_whose_names_are_used_in_physical_constants" title="List of scientists whose names are used in physical constants">Scientists whose names are used in physical constants</a> · <a href="/wiki/List_of_chemical_elements_named_after_people" title="List of chemical elements named after people">People whose names are used in chemical element names</a></div></td></tr></tbody></table></div>    </div><noscript><img src="https://auth.wikimedia.org/loginwiki/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Curie_(unit)&oldid=1282624685">https://en.wikipedia.org/w/index.php?title=Curie_(unit)&oldid=1282624685</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Non-SI_metric_units" title="Category:Non-SI metric units">Non-SI metric units</a></li><li><a href="/wiki/Category:Radioactivity" title="Category:Radioactivity">Radioactivity</a></li><li><a href="/wiki/Category:Units_of_radioactivity" title="Category:Units of radioactivity">Units of radioactivity</a></li><li><a href="/wiki/Category:Pierre_Curie" title="Category:Pierre Curie">Pierre Curie</a></li><li><a href="/wiki/Category:Radium" title="Category:Radium">Radium</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_matches_Wikidata" title="Category:Short description matches Wikidata">Short description matches Wikidata</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 27 March 2025, at 15:56<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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