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</div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Sitio"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Conteníu" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Conteníu</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mover a la barra llateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">despintar</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Entamu</div> </a> </li> <li id="toc-Cálculu_de_'"`UNIQ--postMath-00000002-QINU`"'" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cálculu_de_'"`UNIQ--postMath-00000002-QINU`"'"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Cálculu de '"`UNIQ--postMath-00000002-QINU`"'</span> </div> </a> <ul id="toc-Cálculu_de_'"`UNIQ--postMath-00000002-QINU`"'-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Rellación_ente_la_vida_media_y_el_periodu_de_semidesintegración" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Rellación_ente_la_vida_media_y_el_periodu_de_semidesintegración"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Rellación ente la vida media y el periodu de semidesintegración</span> </div> </a> <ul id="toc-Rellación_ente_la_vida_media_y_el_periodu_de_semidesintegración-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Semiperíodo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Semiperíodo"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Semiperíodo</span> </div> </a> <ul id="toc-Semiperíodo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ver_tamién" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ver_tamién"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Ver tamién</span> </div> </a> <ul id="toc-Ver_tamién-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referencies" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referencies"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Referencies</span> </div> </a> <ul id="toc-Referencies-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Enllaces_esternos" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Enllaces_esternos"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Enllaces esternos</span> </div> </a> <ul id="toc-Enllaces_esternos-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Conteníu" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Cambiar a la tabla de contenidos" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Cambiar a la tabla de contenidos</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Vida media</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="Ir a un artículo en otro idioma. Disponible en 19 idiomas" > <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-19" 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">19 llingües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Lebensdauer_(Physik)" title="Lebensdauer (Physik) – alemán de Suiza" lang="gsw" hreflang="gsw" data-title="Lebensdauer (Physik)" data-language-autonym="Alemannisch" data-language-local-name="alemán de Suiza" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%92%D1%80%D0%B5%D0%BC%D0%B5_%D0%BD%D0%B0_%D0%B6%D0%B8%D0%B2%D0%BE%D1%82" title="Време на живот – búlgaru" lang="bg" hreflang="bg" data-title="Време на живот" data-language-autonym="Български" data-language-local-name="búlgaru" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Vida_mitjana" title="Vida mitjana – catalán" lang="ca" hreflang="ca" data-title="Vida mitjana" data-language-autonym="Català" data-language-local-name="catalán" 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/St%C5%99edn%C3%AD_doba_%C5%BEivota" title="Střední doba života – checu" lang="cs" hreflang="cs" data-title="Střední doba života" data-language-autonym="Čeština" data-language-local-name="checu" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Lebensdauer_(Quantenphysik)" title="Lebensdauer (Quantenphysik) – alemán" lang="de" hreflang="de" data-title="Lebensdauer (Quantenphysik)" data-language-autonym="Deutsch" data-language-local-name="alemán" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%9C%CE%AD%CF%83%CE%BF%CF%82_%CF%87%CF%81%CF%8C%CE%BD%CE%BF%CF%82_%CE%B6%CF%89%CE%AE%CF%82_(%CF%86%CF%85%CF%83%CE%B9%CE%BA%CE%AE)" title="Μέσος χρόνος ζωής (φυσική) – griegu" lang="el" hreflang="el" data-title="Μέσος χρόνος ζωής (φυσική)" data-language-autonym="Ελληνικά" data-language-local-name="griegu" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q70893996 mw-list-item" title=""><a href="https://en.wikipedia.org/wiki/Mean_lifetime" title="Mean lifetime – inglés" lang="en" hreflang="en" data-title="Mean lifetime" data-language-autonym="English" data-language-local-name="inglés" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Vida_media" title="Vida media – español" lang="es" hreflang="es" data-title="Vida media" data-language-autonym="Español" data-language-local-name="español" 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/Batez_besteko_bizitza_(fisika)" title="Batez besteko bizitza (fisika) – vascu" lang="eu" hreflang="eu" data-title="Batez besteko bizitza (fisika)" data-language-autonym="Euskara" data-language-local-name="vascu" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Dur%C3%A9e_de_vie_moyenne" title="Durée de vie moyenne – francés" lang="fr" hreflang="fr" data-title="Durée de vie moyenne" data-language-autonym="Français" data-language-local-name="francés" 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/Me%C3%A1nr%C3%A9" title="Meánré – irlandés" lang="ga" hreflang="ga" data-title="Meánré" data-language-autonym="Gaeilge" data-language-local-name="irlandés" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%90%D7%95%D7%A8%D7%9A_%D7%97%D7%99%D7%99%D7%9D_%D7%9E%D7%9E%D7%95%D7%A6%D7%A2" title="אורך חיים ממוצע – hebréu" lang="he" hreflang="he" data-title="אורך חיים ממוצע" data-language-autonym="עברית" data-language-local-name="hebréu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Vita_media" title="Vita media – italianu" lang="it" hreflang="it" data-title="Vita media" data-language-autonym="Italiano" data-language-local-name="italianu" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Middelliv" title="Middelliv – noruegu Nynorsk" lang="nn" hreflang="nn" data-title="Middelliv" data-language-autonym="Norsk nynorsk" data-language-local-name="noruegu Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Vida_m%C3%A9dia" title="Vida média – portugués" lang="pt" hreflang="pt" data-title="Vida média" data-language-autonym="Português" data-language-local-name="portugués" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%92%D1%80%D0%B5%D0%BC%D1%8F_%D0%B6%D0%B8%D0%B7%D0%BD%D0%B8_%D0%BA%D0%B2%D0%B0%D0%BD%D1%82%D0%BE%D0%B2%D0%BE%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE%D0%B9_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D1%8B" title="Время жизни квантовомеханической системы – rusu" lang="ru" hreflang="ru" data-title="Время жизни квантовомеханической системы" data-language-autonym="Русский" data-language-local-name="rusu" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Razpadni_%C4%8Das" title="Razpadni čas – eslovenu" lang="sl" hreflang="sl" data-title="Razpadni čas" data-language-autonym="Slovenščina" data-language-local-name="eslovenu" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A7%D0%B0%D1%81_%D0%B6%D0%B8%D1%82%D1%82%D1%8F" title="Час життя – ucraín" lang="uk" hreflang="uk" data-title="Час життя" data-language-autonym="Українська" data-language-local-name="ucraín" 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/Th%E1%BB%9Di_gian_s%E1%BB%91ng_trung_b%C3%ACnh_(v%E1%BA%ADt_l%C3%BD)" title="Thời gian sống trung bình (vật lý) – vietnamín" lang="vi" hreflang="vi" data-title="Thời gian sống trung bình (vật lý)" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamín" class="interlanguage-link-target"><span>Tiếng Việt</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/Q1758559#sitelinks-wikipedia" title="Editar los enllaces d'interllingua" class="wbc-editpage">Editar los enllaces</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espacios de nome"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Vida_media" title="Ver la páxina de conteníu [c]" accesskey="c"><span>Páxina</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Alderique:Vida_media&action=edit&redlink=1" rel="discussion" class="new" title="Alderique tocante al conteníu de la páxina (la páxina nun esiste) [t]" accesskey="t"><span>Alderique</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Cambiar variante de idioma" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">asturianu</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Vistes"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Vida_media"><span>Lleer</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Vida_media&veaction=edit" title="Editar esta páxina [v]" accesskey="v"><span>Editar</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Vida_media&action=edit" title="Editar el códigu fonte d'esta páxina [e]" accesskey="e"><span>Editar la fonte</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Vida_media&action=history" title="Versiones antigües d'esta páxina [h]" accesskey="h"><span>Ver historial</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Ferramientes de páxina"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Ferramientes" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Ferramientes</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Ferramientes</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mover a la barra llateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">despintar</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Más opciones" > <div class="vector-menu-heading"> Aiciones </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Vida_media"><span>Lleer</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Vida_media&veaction=edit" title="Editar esta páxina [v]" accesskey="v"><span>Editar</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Vida_media&action=edit" title="Editar el códigu fonte d'esta páxina [e]" accesskey="e"><span>Editar la fonte</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Vida_media&action=history"><span>Ver historial</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Xeneral </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Especial:LoQueEnlazaAqu%C3%AD/Vida_media" title="Llista de toles páxines wiki qu'enllacien equí [j]" accesskey="j"><span>Lo qu'enllaza equí</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:CambiosEnEnlazadas/Vida_media" rel="nofollow" title="Cambios recientes nes páxines enllazaes dende esta [k]" accesskey="k"><span>Cambios rellacionaos</span></a></li><li id="t-upload" class="mw-list-item"><a href="//commons.wikimedia.org/wiki/Special:UploadWizard?uselang=ast" title="Xubir ficheros [u]" accesskey="u"><span>Xubir ficheru</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Especial:P%C3%A1ginasEspeciales" title="Llista de toles páxines especiales [q]" accesskey="q"><span>Páxines especiales</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Vida_media&oldid=4233912" title="Enllaz permanente a esta revisión de la páxina"><span>Enllaz permanente</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Vida_media&action=info" title="Más información sobro esta páxina"><span>Información de la páxina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Especial:Citar&page=Vida_media&id=4233912&wpFormIdentifier=titleform" title="Información tocante a cómo citar esta páxina"><span>Citar esta páxina</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Especial:Acortador_de_URL&url=https%3A%2F%2Fast.wikipedia.org%2Fwiki%2FVida_media"><span>Llograr la URL encurtiada</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Especial:QrCode&url=https%3A%2F%2Fast.wikipedia.org%2Fwiki%2FVida_media"><span>Xenerar códigu QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Imprentar/esportar </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Especial:Libro&bookcmd=book_creator&referer=Vida+media"><span>Crear un llibru</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Especial:DownloadAsPdf&page=Vida_media&action=show-download-screen"><span>Descargar como PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Vida_media&printable=yes" title="Versión imprentable d'esta páxina [p]" accesskey="p"><span>Versión pa imprentar</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> N'otros proyeutos </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1758559" title="Enllaz al elementu del depósitu de datos coneutáu [g]" accesskey="g"><span>Elementu de Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Ferramientes de páxina"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Apariencia"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Apariencia</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mover a la barra llateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">despintar</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> <div id="mw-indicator-tradubot" class="mw-indicator"><div class="mw-parser-output"><span typeof="mw:File"><a href="https://es.wikipedia.org/wiki/Vida_media" title="Esti artículu foi traducíu automáticamente y precisa revisase manualmente"><img alt="Esti artículu foi traducíu automáticamente y precisa revisase manualmente" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/05/Robot_icon.svg/16px-Robot_icon.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/05/Robot_icon.svg/24px-Robot_icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/05/Robot_icon.svg/32px-Robot_icon.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></div></div> </div> <div id="siteSub" class="noprint">De Wikipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ast" dir="ltr"><div class="rellink noprint"> Pa ver otros usos d'esti términu, <a href="/w/index.php?title=Vida_media_(dixebra)&action=edit&redlink=1" class="new" title="Vida media (dixebra) (la páxina nun esiste)">Vida media (dixebra)</a>.</div> <table class="infobox plantia-xenerica" style="font-size:90%;width:25em"><tbody><tr><th colspan="2" style="text-align:center;font-size:125%;font-weight:bold;background-color: #acacac">Vida media</th></tr><tr><td colspan="2" style="text-align:center;background-color: #cdcdcd"> duración <sup>(es)</sup> <span class="mw-valign-baseline skin-invert" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q2199864?uselang=ast" title="Traducir"><img alt="Traducir" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/10px-Noun_Project_label_icon_1116097_cc_mirror.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/15px-Noun_Project_label_icon_1116097_cc_mirror.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/Noun_Project_label_icon_1116097_cc_mirror.svg/20px-Noun_Project_label_icon_1116097_cc_mirror.svg.png 2x" data-file-width="158" data-file-height="161" /></a></span> y propiedá física escalar</td></tr><tr><td colspan="2" style="text-align:right"><span typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q1758559" title="Cambiar los datos en Wikidata"><img alt="Cambiar los datos en Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/12px-Arbcom_ru_editing.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/18px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/24px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></td></tr></tbody></table> <p>La <b>vida media</b> ye'l permediu de vida d'un <a href="/wiki/Nucleu_at%C3%B3micu" title="Nucleu atómicu">nucleu</a> o d'una <a href="/wiki/Part%C3%ADcula_subat%C3%B3mica" title="Partícula subatómica">partícula subatómica</a> llibre antes de desintegrarse. Representar cola lletra griega <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \tau }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>τ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \tau }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/38a7dcde9730ef0853809fefc18d88771f95206c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.202ex; height:1.676ex;" alt="{\displaystyle \tau }"></span> (<a href="/wiki/T" title="T">Tau</a>). La <a href="/w/index.php?title=Desintegraci%C3%B3n_de_part%C3%ADcules&action=edit&redlink=1" class="new" title="Desintegración de partícules (la páxina nun esiste)">desintegración de partícules</a> ye un procesu probabilístico (en concretu sigue la <a href="/wiki/Distribuci%C3%B3n_de_Poisson" title="Distribución de Poisson">llei de Poisson</a>) polo qu'esto nun significa qu'un determináu nucleu vaya a tardar esautamente esi tiempu en desintegrarse. La vida media nun tien de confundir se col <a href="/wiki/Periodu_de_semidesintegraci%C3%B3n" title="Periodu de semidesintegración">periodu de semidesintegración</a>, semiperiodo, vida metá o <a href="/w/index.php?title=Semivida&action=edit&redlink=1" class="new" title="Semivida (la páxina nun esiste)">semivida</a>: son conceutos rellacionaos, pero distintos. En particular el periodu de semidesintegración aplícase solamente a sustancies radiactives y non a <a href="/wiki/Part%C3%ADcula_subat%C3%B3mica" title="Partícula subatómica">partícules</a> llibres como se diz. </p><p>Comprobóse que los isótopos de los elementos radiactivos presenten distintos graos d'inestabilidá nel tiempu por cuenta de que cada isótopu aparra o se tresforma n'otros siguiendo una serie radioactiva particular. Pa referinos a la velocidá con qu'asoceden les desintegraciones nucleares utilizamos el conceutu de vida media. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Cálculu_de_'"`UNIQ--postMath-00000002-QINU`"'"><span id="C.C3.A1lculu_de_.7F.27.22.60UNIQ--postMath-00000002-QINU.60.22.27.7F"></span>Cálculu de <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \tau }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>τ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \tau }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/38a7dcde9730ef0853809fefc18d88771f95206c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.202ex; height:1.676ex;" alt="{\displaystyle \tau }"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vida_media&veaction=edit&section=1" title="Editar seición: Cálculu de '"`UNIQ--postMath-00000002-QINU`"'" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vida_media&action=edit&section=1" title="Editar el código fuente de la sección: Cálculu de '"`UNIQ--postMath-00000002-QINU`"'"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Notación: No que sigue, <i>átomos</i> significa <i>átomos d'un isótopu radiactivu determináu</i>. </p> <ul><li><b><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \tau }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>τ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \tau }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/38a7dcde9730ef0853809fefc18d88771f95206c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.202ex; height:1.676ex;" alt="{\displaystyle \tau }"></span></b> ye la vida media.</li> <li><b><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle N(t)}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>N</mi> <mo stretchy="false">(</mo> <mi>t</mi> <mo stretchy="false">)</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle N(t)}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/4a8aa64e349180ee714adfb6620d3bb4610d97d0" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:4.713ex; height:2.843ex;" alt="{\displaystyle N(t)}"></span></b> ye'l númberu d'átomos na muestra nel intre de tiempu t.</li> <li><b><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle N_{0}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>N</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle N_{0}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/5b6328fbe0cded37216c90735c89ee188be26a30" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:2.92ex; height:2.509ex;" alt="{\displaystyle N_{0}}"></span></b> ye'l númberu inicial (cuando t = 0) d'átomos na muestra.</li> <li><b><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \lambda }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>λ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \lambda }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b43d0ea3c9c025af1be9128e62a18fa74bedda2a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.355ex; height:2.176ex;" alt="{\displaystyle \lambda }"></span></b> ye la constante de desintegración.</li></ul> <p>Mientres un intervalu de tiempu <i>dt</i>, el númberu d'átomos que sume de la muestra <i>dN</i> ye igual a la variación de población de la muestra (nótese'l signu negativu que signifca medría negativa o <b>decrecimiento</b>): </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle -dN=N(t)\cdot \;\lambda \cdot \;dt\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mo>−</mo> <mi>d</mi> <mi>N</mi> <mo>=</mo> <mi>N</mi> <mo stretchy="false">(</mo> <mi>t</mi> <mo stretchy="false">)</mo> <mo>⋅</mo> <mspace width="thickmathspace" /> <mi>λ</mi> <mo>⋅</mo> <mspace width="thickmathspace" /> <mi>d</mi> <mi>t</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle -dN=N(t)\cdot \;\lambda \cdot \;dt\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/c1372dfd6ddfa2d88e383738db4d3486b7e3c475" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:21.345ex; height:2.843ex;" alt="{\displaystyle -dN=N(t)\cdot \;\lambda \cdot \;dt\,}"></span></dd></dl> <p>La solución d'esta <a href="/wiki/Ecuaci%C3%B3n_diferencial" title="Ecuación diferencial">ecuación diferencial</a> danos la variación <a href="/w/index.php?title=Esponencial&action=edit&redlink=1" class="new" title="Esponencial (la páxina nun esiste)">esponencial</a> de la población d'átomos radiactivos col tiempu: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle N(t)=N_{0}y^{-\lambda t}\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>N</mi> <mo stretchy="false">(</mo> <mi>t</mi> <mo stretchy="false">)</mo> <mo>=</mo> <msub> <mi>N</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msub> <msup> <mi>y</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mi>λ</mi> <mi>t</mi> </mrow> </msup> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle N(t)=N_{0}y^{-\lambda t}\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ebb8f2e83dadf33938e6c2b8249ae4d17ede8eda" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:15.342ex; height:3.176ex;" alt="{\displaystyle N(t)=N_{0}y^{-\lambda t}\,}"></span></dd></dl> <p>La vida media <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \tau }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>τ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \tau }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/38a7dcde9730ef0853809fefc18d88771f95206c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.202ex; height:1.676ex;" alt="{\displaystyle \tau }"></span>, esto ye, la duración permediu d'un átomu radiactivu na muestra resulta de la evaluación siguiente: </p><p><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \tau ={\frac {\int _{0}^{\infty }tN(t)dt}{\int _{0}^{\infty }N(t)dt}}={\frac {\int _{0}^{\infty }te^{-\lambda t}\,dt}{\int _{0}^{\infty }y^{-\lambda t}\,dt}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>τ</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <msubsup> <mo>∫</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">∞</mi> </mrow> </msubsup> <mi>t</mi> <mi>N</mi> <mo stretchy="false">(</mo> <mi>t</mi> <mo stretchy="false">)</mo> <mi>d</mi> <mi>t</mi> </mrow> <mrow> <msubsup> <mo>∫</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">∞</mi> </mrow> </msubsup> <mi>N</mi> <mo stretchy="false">(</mo> <mi>t</mi> <mo stretchy="false">)</mo> <mi>d</mi> <mi>t</mi> </mrow> </mfrac> </mrow> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <msubsup> <mo>∫</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">∞</mi> </mrow> </msubsup> <mi>t</mi> <msup> <mi>e</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mi>λ</mi> <mi>t</mi> </mrow> </msup> <mspace width="thinmathspace" /> <mi>d</mi> <mi>t</mi> </mrow> <mrow> <msubsup> <mo>∫</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">∞</mi> </mrow> </msubsup> <msup> <mi>y</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mi>λ</mi> <mi>t</mi> </mrow> </msup> <mspace width="thinmathspace" /> <mi>d</mi> <mi>t</mi> </mrow> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \tau ={\frac {\int _{0}^{\infty }tN(t)dt}{\int _{0}^{\infty }N(t)dt}}={\frac {\int _{0}^{\infty }te^{-\lambda t}\,dt}{\int _{0}^{\infty }y^{-\lambda t}\,dt}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/32786b8822aa75a4e300daacc540244120861f20" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.171ex; width:31.661ex; height:7.509ex;" alt="{\displaystyle \tau ={\frac {\int _{0}^{\infty }tN(t)dt}{\int _{0}^{\infty }N(t)dt}}={\frac {\int _{0}^{\infty }te^{-\lambda t}\,dt}{\int _{0}^{\infty }y^{-\lambda t}\,dt}}}"></span> , </p><p>qu'<a href="/w/index.php?title=Integraci%C3%B3n_por_partes&action=edit&redlink=1" class="new" title="Integración por partes (la páxina nun esiste)">integrada per partes</a> da como resultáu: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \tau ={\frac {1}{\lambda }}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>τ</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mi>λ</mi> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \tau ={\frac {1}{\lambda }}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/c904f40c86cc8ede90f856b08545698cb785e4b7" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.005ex; width:6.492ex; height:5.343ex;" alt="{\displaystyle \tau ={\frac {1}{\lambda }}}"></span></dd></dl> <div class="mw-heading mw-heading2"><h2 id="Rellación_ente_la_vida_media_y_el_periodu_de_semidesintegración"><span id="Rellaci.C3.B3n_ente_la_vida_media_y_el_periodu_de_semidesintegraci.C3.B3n"></span>Rellación ente la vida media y el periodu de semidesintegración</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vida_media&veaction=edit&section=2" title="Editar seición: Rellación ente la vida media y el periodu de semidesintegración" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vida_media&action=edit&section=2" title="Editar el código fuente de la sección: Rellación ente la vida media y el periodu de semidesintegración"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La vida media (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \tau }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>τ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \tau }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/38a7dcde9730ef0853809fefc18d88771f95206c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.202ex; height:1.676ex;" alt="{\displaystyle \tau }"></span>) ye igual a la inversa de la constante de desintegración (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \lambda }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>λ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \lambda }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b43d0ea3c9c025af1be9128e62a18fa74bedda2a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.355ex; height:2.176ex;" alt="{\displaystyle \lambda }"></span>). </p><p>Asina, resulta tamién que <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \tau }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>τ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \tau }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/38a7dcde9730ef0853809fefc18d88771f95206c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.202ex; height:1.676ex;" alt="{\displaystyle \tau }"></span> ye igual al tiempu necesariu por que'l númberu d'átomos amenorgar nun factor <a href="/wiki/N%C3%BAmberu_e" title="Númberu e">e</a>; y rellaciónase col <a href="/wiki/Periodu_de_semidesintegraci%C3%B3n" title="Periodu de semidesintegración">periodu de semidesintegración</a>, vida metá, hemivida o semivida, según la siguiente fórmula: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle t_{1/2}=\tau \cdot \ln 2}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>t</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mn>2</mn> </mrow> </msub> <mo>=</mo> <mi>τ</mi> <mo>⋅</mo> <mi>ln</mi> <mo>⁡</mo> <mn>2</mn> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle t_{1/2}=\tau \cdot \ln 2}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/878b20b57a4fa93e3235c0183cef1b26de0fe309" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.171ex; width:13.006ex; height:3.009ex;" alt="{\displaystyle t_{1/2}=\tau \cdot \ln 2}"></span></dd></dl> <div class="mw-heading mw-heading2"><h2 id="Semiperíodo"><span id="Semiper.C3.ADodo"></span>Semiperíodo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vida_media&veaction=edit&section=3" title="Editar seición: Semiperíodo" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vida_media&action=edit&section=3" title="Editar el código fuente de la sección: Semiperíodo"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Semiperíodo da llugar a tracamundiu. Por casu, na descripción de los aceleradores de partícules dizse: </p> <ul><li>El campu magnético afaise de cuenta que'l tiempu que se precisa pa percorrer la trayeutoria semicircular dientro del electrodu sía igual al semiperiodo de les oscilaciones. Arriendes d'ello, cuando los iones vuelven a la rexón entemedia, el campu llétrico invertiría'l so sentíu y los iones van recibir entós un segundu aumentu de la velocidá al pasar al interior de la otra 'D' <a rel="nofollow" class="external autonumber" href="http://html.rincondelvago.com/ciclotron.html">[1]</a>.</li></ul> <ul><li>Acelerador de partícules cargaes. El ciclotrón - El campu magnético afaise de cuenta que'l tiempu que se precisa para ... Arriendes d'ello, cuando los iones vuelven a la rexón entemedia, el campu ...<span class="broken-link"></span> <span class="plainlinks" style="background-color:var(--background-color-warning-subtle, #fdf2d5); color:inherit; font-size:85%">(<a href="/wiki/Ayuda:C%C3%B3mo_recuperar_un_enllaz_rotu" class="mw-redirect" title="Ayuda:Cómo recuperar un enllaz rotu">enllaz rotu</a> disponible n'<a href="/wiki/Internet_Archive" title="Internet Archive">Internet Archive</a>; ver l'<a rel="nofollow" class="external text" href="//web.archive.org/web/*/http://www.sc.ehu.es/sbweb/fisica/elecmagnet/ciclotron/ciclu.html">historial</a> y la <a rel="nofollow" class="external text" href="//web.archive.org/web/2/http://www.sc.ehu.es/sbweb/fisica/elecmagnet/ciclotron/ciclu.html">última versión</a>).</span>.</li></ul> <ul><li>El ciclotrón...a les velocidaes de los iones, el tiempu que se precisa pal percorríu...Podemos calcular el semiperiodo, teniendo en cuenta que'l tiempu que -y... <span class="broken-link">nestorc/elecmagnet/ciclotron/ciclu.html</span> <span class="plainlinks" style="background-color:var(--background-color-warning-subtle, #fdf2d5); color:inherit; font-size:85%">(<a href="/wiki/Ayuda:C%C3%B3mo_recuperar_un_enllaz_rotu" class="mw-redirect" title="Ayuda:Cómo recuperar un enllaz rotu">enllaz rotu</a> disponible n'<a href="/wiki/Internet_Archive" title="Internet Archive">Internet Archive</a>; ver l'<a rel="nofollow" class="external text" href="//web.archive.org/web/*/http://rsta.pucmm.edu.do/profesor/">historial</a> y la <a rel="nofollow" class="external text" href="//web.archive.org/web/2/http://rsta.pucmm.edu.do/profesor/">última versión</a>).</span>.</li></ul> <ul><li>El campu magnético afaise de cuenta que'l tiempu que se precisa pa percorrer la trayeutoria semicircular dientro del electrodu sía igual al semiperiodo de les oscilaciones <a href="/w/index.php?title=Ciclotr%C3%B3n&action=edit&redlink=1" class="new" title="Ciclotrón (la páxina nun esiste)">Ciclotrón</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Ver_tamién"><span id="Ver_tami.C3.A9n"></span>Ver tamién</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vida_media&veaction=edit&section=4" title="Editar seición: Ver tamién" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vida_media&action=edit&section=4" title="Editar el código fuente de la sección: Ver tamién"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Periodu_de_semidesintegraci%C3%B3n" title="Periodu de semidesintegración">Periodu de semidesintegración</a></li> <li><a href="/wiki/Is%C3%B3topu" title="Isótopu">Isótopu</a></li> <li><a href="/w/index.php?title=Radiois%C3%B3topo&action=edit&redlink=1" class="new" title="Radioisótopo (la páxina nun esiste)">Radioisótopo</a></li> <li><a href="/wiki/Carbonu_14" class="mw-redirect" title="Carbonu 14">Carbonu 14</a></li> <li><a href="/w/index.php?title=Anchor_de_desintegraci%C3%B3n&action=edit&redlink=1" class="new" title="Anchor de desintegración (la páxina nun esiste)">Anchor de desintegración</a></li></ul> <p><br /> </p> <div class="mw-heading mw-heading2"><h2 id="Referencies">Referencies</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vida_media&veaction=edit&section=5" title="Editar seición: Referencies" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vida_media&action=edit&section=5" title="Editar el código fuente de la sección: Referencies"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r3503771">@media only screen and (max-width:600px){.mw-parser-output .llistaref{column-count:1!important}}</style><div class="llistaref" style="list-style-type: decimal;"></div> <div class="mw-heading mw-heading2"><h2 id="Enllaces_esternos">Enllaces esternos</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Vida_media&veaction=edit&section=6" title="Editar seición: Enllaces esternos" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Vida_media&action=edit&section=6" title="Editar el código fuente de la sección: Enllaces esternos"><span>editar la fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><span class="navigation-not-searchable"> </span></p> <ul><li><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/15px-Commons-logo.svg.png" decoding="async" width="15" height="20" class="mw-file-element" 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