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field--type-image field--label-hidden field--item"> <img loading="lazy" src="/sites/default/files/styles/1000x300/public/2023-09/labs_cloud_chamber_rect_0.jpeg?itok=KwIuGda5" width="1000" height="300" alt="Chambre 脿 brouillard" typeof="foaf:Image" class="img-responsive" /> </div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><p><strong>Construisez votre propre d茅tecteur de particules pour rendre visibles les particules ionisantes et 茅tudiez les propri茅t茅s des diff茅rentes traces de particules.</strong></p> <p>Bien que nous ne puissions pas les voir, les particules ionisantes font partie de notre vie quotidienne. Par exemple, les particules cosmiques qui interagissent avec les couches sup茅rieures de l'atmosph猫re terrestre produisent des gerbes de nouvelles particules, dont certaines atteignent le sol. Les 茅l茅ments radioactifs naturels pr茅sents dans l'air 茅mettent des particules alpha. Gr芒ce 脿 l'interaction avec certains mat茅riaux de d茅tection, nous pouvons rendre visibles les traces de particules ionisantes. </p> <p>Dans cet atelier, les participants construisent leur propre d茅tecteur de particules, une chambre 脿 brouillard, en utilisant de la glace carbonique et de l'isopropanol pour rendre visibles les particules cosmiques et le rayonnement naturel. Ils 茅tudient les propri茅t茅s des diff茅rentes traces de particules avant de pr茅senter et de discuter leurs observations.</p> <p><strong>La chambre 脿 brouillard a 茅t茅 l'un des premiers d茅tecteurs de particules et a 茅t茅 utilis茅e pour d茅couvrir le positron </strong>(prix Nobel 1932) <strong>et le muon</strong> (prix Nobel 1936). Aujourd'hui, les chambres 脿 nuages ne sont plus utilis茅es que dans l'enseignement. Les d茅tecteurs de particules modernes du CERN utilisent des principes de d茅tection de particules similaires 脿 ceux des chambres 脿 brouillard (bien que les techniques soient diff茅rentes) pour explorer les propri茅t茅s des particules.</p> </div> <div class="field field--name-field-age field--type-text field--label-inline"> <div class="field--label"><b>脗ge</b></div> <div class="field--item">16-19</div> </div> <div class="field field--name-field-duration field--type-text field--label-inline"> <div class="field--label"><b>Dur茅e</b></div> <div class="field--item">90 minutes</div> </div> <div class="field field--name-field-languages field--type-text field--label-inline"> <div class="field--label"><b>Langue</b></div> <div class="field--item">Pour les groupes, ateliers en 30 langues diff茅rentes, selon la disponibilit茅 des guides.</div> </div> <div class="field field--name-field-participants field--type-text field--label-inline"> <div class="field--label"><b>Participants</b></div> <div class="field--item">12 脿 24</div> </div> <div class="field field--name-field-accessiibility field--type-text field--label-inline"> <div class="field--label"><b>Accessibilit茅</b></div> <div class="field--item">accessible aux poussettes et aux fauteuils roulants.</div> </div> </div> </div> </div> </div> </div> </main> <footer role="contentinfo"> <div class="row cern-footer"> <div class="col-xs-12 col-sm-3 col-md-3 col-lg-3 footer-first-col"> <div class="region region-footercolumn1"> <nav role="navigation" aria-labelledby="block-cernclean-footer-menu" id="block-cernclean-footer"> <h2 id="block-cernclean-footer-menu">Nous contacter</h2> <ul class="menu nav"> <li> <a href="https://home.cern/fr/press" title="Contact CERN Press Office">Bureau de presse</a> </li> <li> <a href="/fr/form/contact" title="Contractez-nous si vous n'avez pas trouv茅 l'information que vous cherchiez. 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