{"id":117018,"date":"2022-05-26T06:40:14","date_gmt":"2022-05-26T05:40:14","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-datation-au-carbone-14-datation-au-radiocarbone-definition\/"},"modified":"2022-06-01T09:25:17","modified_gmt":"2022-06-01T08:25:17","slug":"quest-ce-que-la-datation-au-carbone-14-datation-au-radiocarbone-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-datation-au-carbone-14-datation-au-radiocarbone-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la datation au carbone 14 &#8211; Datation au radiocarbone &#8211; D\u00e9finition"},"content":{"rendered":"<p><span><div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">La datation au carbone 14, \u00e9galement connue sous le nom de datation au radiocarbone, est une m\u00e9thode permettant de d\u00e9terminer l&rsquo;\u00e2ge d&rsquo;un objet contenant de la mati\u00e8re organique en utilisant les propri\u00e9t\u00e9s du radionucl\u00e9ide carbone 14.\u00a0Propri\u00e9t\u00e9s des mat\u00e9riaux<\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><strong><span>La datation au carbone 14<\/span><\/strong><span>, \u00e9galement connue sous le nom de\u00a0<\/span><strong><span>datation au radiocarbone<\/span><\/strong><span>, est une m\u00e9thode permettant de d\u00e9terminer l&rsquo;\u00e2ge d&rsquo;un objet contenant\u00a0<\/span><strong><span>une mati\u00e8re organique<\/span><\/strong><span>\u00a0en utilisant les propri\u00e9t\u00e9s du radionucl\u00e9ide carbone 14.\u00a0Le carbone 14 radioactif a une\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radioactive-decay-law\/half-life\/\"><span>demi-vie<\/span><\/a><span>\u00a0de\u00a0<\/span><strong><span>5730 ans<\/span><\/strong><span>\u00a0et subit une\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/beta-decay-beta-radioactivity\/\"><strong><span>d\u00e9sint\u00e9gration \u03b2\u2212<\/span><\/strong><\/a><span>\u00a0, o\u00f9 le\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\"><span>neutron<\/span><\/a><span>\u00a0est converti en un\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/what-is-proton-properties-of-proton\/\"><span>proton<\/span><\/a><span>, un\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/what-is-electron-properties-of-electron\/\"><span>\u00e9lectron<\/span><\/a><span>\u00a0et un\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/antineutrino\/\"><span>\u00e9lectron antineutrino<\/span><\/a><span>:<\/span><\/p>\n<figure id=\"attachment_11688\" aria-describedby=\"caption-attachment-11688\" style=\"width: 658px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/Beta_Minus_Decay.png\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-11688 size-full\" src=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/Beta_Minus_Decay.png\" alt=\"d\u00e9sint\u00e9gration b\u00eata - datation au carbone 14\" width=\"668\" height=\"178\" \/><\/a><figcaption id=\"caption-attachment-11688\" class=\"wp-caption-text\"><span>D\u00e9sint\u00e9gration b\u00eata du noyau C-14.<\/span><\/figcaption><\/figure>\n<p><span>Malgr\u00e9 cette courte demi-vie par rapport \u00e0 l&rsquo;\u00e2ge de la terre, le carbone 14 est un isotope naturel.\u00a0Sa pr\u00e9sence peut s&rsquo;expliquer par la simple observation suivante.\u00a0Notre\u00a0<\/span><strong><span>atmosph\u00e8re<\/span><\/strong><span>\u00a0contient de nombreux gaz, dont l&rsquo;azote-14.\u00a0De plus, l&rsquo;atmosph\u00e8re est constamment bombard\u00e9e de\u00a0<\/span><strong><span>rayons cosmiques de haute \u00e9nergie<\/span><\/strong><span>, constitu\u00e9s de protons, de noyaux plus lourds ou de rayons gamma.\u00a0Ces rayons cosmiques interagissent avec les noyaux de l&rsquo;atmosph\u00e8re et produisent \u00e9galement des neutrons de haute \u00e9nergie.\u00a0Ces neutrons produits lors de ces collisions peuvent \u00eatre absorb\u00e9s par l&rsquo;azote 14 pour produire un isotope du carbone 14:<\/span><\/p>\n<p><a href=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/carbon-14-dating-formation.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-25290\" src=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/carbon-14-dating-formation.png\" alt=\"datation au carbone 14 - formation\" width=\"196\" height=\"41\" \/><\/a><\/p>\n<p><strong><span>Le carbone 14<\/span><\/strong><span>\u00a0peut \u00e9galement \u00eatre produit dans l&rsquo;atmosph\u00e8re par d&rsquo;autres r\u00e9actions neutroniques, dont notamment le 13C(n,\u03b3)14C et le 17O(n,\u03b1)14C.\u00a0En cons\u00e9quence,\u00a0<\/span><strong><span>le carbone 14<\/span><\/strong><span>\u00a0se forme en continu dans la haute atmosph\u00e8re par l&rsquo;interaction des rayons cosmiques avec l&rsquo;azote atmosph\u00e9rique.\u00a0En moyenne, un seul\u00a0atome de carbone sur 1,3 x 10<\/span><sup><span>12\u00a0<\/span><\/sup><span>dans l&rsquo;atmosph\u00e8re est un atome de carbone 14 radioactif.<\/span><\/p>\n<p><span>Le carbone 14 r\u00e9sultant se combine avec l&rsquo;oxyg\u00e8ne atmosph\u00e9rique pour former\u00a0<\/span><strong><span>du dioxyde de carbone radioactif<\/span><\/strong><span>, qui est incorpor\u00e9 dans les plantes par photosynth\u00e8se.\u00a0Par cons\u00e9quent, tous les syst\u00e8mes biologiques comme les plantes, les animaux et les humains contiennent un certain niveau de carbone 14 radioactif.\u00a0Tant que le syst\u00e8me biologique est vivant, le niveau est constant en raison de l&rsquo;apport constant de tous les isotopes du carbone.\u00a0Lorsque le syst\u00e8me biologique meurt, il cesse d&rsquo;\u00e9changer du carbone avec son environnement et, \u00e0 partir de ce moment, la quantit\u00e9 de carbone 14 qu&rsquo;il contient commence \u00e0 diminuer \u00e0 mesure que le carbone 14 subit une d\u00e9sint\u00e9gration radioactive.\u00a0En revanche, la quantit\u00e9 de carbone 12 stable reste inchang\u00e9e.\u00a0En cons\u00e9quence, la concentration relative de ces deux isotopes dans tout organisme change apr\u00e8s sa mort.\u00a0La m\u00e9thode permet d&rsquo;\u00e9tablir des datations jusqu&rsquo;\u00e0 environ 20 000 ans avec une pr\u00e9cision d&rsquo;environ \u00b1 100 ans.<\/span><\/p>\n<p><span>La technique de datation au carbone a \u00e9t\u00e9 sugg\u00e9r\u00e9e initialement par\u00a0<\/span><strong><span>Willard Libby<\/span><\/strong><span>\u00a0et ses coll\u00e8gues en 1949. En 1960, Willard Libby a re\u00e7u le prix Nobel de chimie pour ce travail.<\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-arrow\" data-anchor=\"R\u00e9f\u00e9rences\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>R\u00e9f\u00e9rences :<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">\n<p><strong><span>Protection contre les radiations:<\/span><\/strong><\/p>\n<ol>\n<li><span>Knoll, Glenn F., Radiation Detection and Measurement 4th Edition, Wiley, 8\/2010.\u00a0ISBN-13\u00a0: 978-0470131480.<\/span><\/li>\n<li><span>Stabin, Michael G., Radioprotection et dosim\u00e9trie : une introduction \u00e0 la physique de la sant\u00e9, Springer, 10\/2010.\u00a0ISBN-13\u00a0: 978-1441923912.<\/span><\/li>\n<li><span>Martin, James E., Physics for Radiation Protection 3rd Edition, Wiley-VCH, 4\/2013.\u00a0ISBN-13\u00a0: 978-3527411764.<\/span><\/li>\n<li><span>USNRC, CONCEPTS DE R\u00c9ACTEURS NUCL\u00c9AIRES<\/span><\/li>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, de la physique nucl\u00e9aire et de la th\u00e9orie des r\u00e9acteurs.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/li>\n<\/ol>\n<p><strong><span>Physique nucl\u00e9aire et des r\u00e9acteurs:<\/span><\/strong><\/p>\n<ol>\n<li><span>JR Lamarsh, Introduction \u00e0 la th\u00e9orie des r\u00e9acteurs nucl\u00e9aires, 2e \u00e9d., Addison-Wesley, Reading, MA (1983).<\/span><\/li>\n<li><span>JR Lamarsh, AJ Baratta, Introduction au g\u00e9nie nucl\u00e9aire, 3e \u00e9d., Prentice-Hall, 2001, ISBN : 0-201-82498-1.<\/span><\/li>\n<li><span>WM Stacey, Physique des r\u00e9acteurs nucl\u00e9aires, John Wiley &amp; Sons, 2001, ISBN : 0-471-39127-1.<\/span><\/li>\n<li><span>Glasstone, Sesonsk\u00e9.\u00a0Ing\u00e9nierie des r\u00e9acteurs nucl\u00e9aires\u00a0: Ing\u00e9nierie des syst\u00e8mes de r\u00e9acteurs, Springer\u00a0;\u00a04e \u00e9dition, 1994, ISBN : 978-0412985317<\/span><\/li>\n<li><span>WSC Williams.\u00a0Physique nucl\u00e9aire et des particules.\u00a0Presse Clarendon\u00a0;\u00a01 \u00e9dition, 1991, ISBN : 978-0198520467<\/span><\/li>\n<li><span>GRKeep.\u00a0Physique de la cin\u00e9tique nucl\u00e9aire.\u00a0Pub Addison-Wesley.\u00a0Co;\u00a01\u00e8re \u00e9dition, 1965<\/span><\/li>\n<li><span>Robert Reed Burn, Introduction au fonctionnement des r\u00e9acteurs nucl\u00e9aires, 1988.<\/span><\/li>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, de la physique nucl\u00e9aire et de la th\u00e9orie des r\u00e9acteurs.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/li>\n<li><span>Paul Reuss, Physique des neutrons.\u00a0EDP \u200b\u200bSciences, 2008. ISBN : 978-2759800414.<\/span><\/li>\n<\/ol>\n<p><span><\/span><\/p><\/div><\/div><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/div><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h2><span>Voir \u00e9galement:<\/span><\/h2>\n<p><span>Datation radiom\u00e9trique<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radiometric-dating-radioactive-dating\/\" class=\"su-button su-button-style-flat \" style=\"color:#606060;background-color:#ffffff;border-color:#cccccc;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><img src=\"icon : lien\" alt=\"\" style=\"width:24px;height:24px\" \/> <\/span><\/a> <\/span><\/p><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span>Nous esp\u00e9rons que cet article,\u00a0<\/span><strong><span>Rencontres au carbone 14 &#8211; Rencontres au radiocarbone<\/span><\/strong><span>, vous aidera.\u00a0Si oui,\u00a0<\/span><strong><span>donnez-nous un like<\/span><\/strong><span>\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous esp\u00e9rons que cet article,\u00a0Rencontres au carbone 14 &#8211; Rencontres au radiocarbone, vous aidera.\u00a0Si oui,\u00a0donnez-nous un like\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce que la datation au carbone 14 - Datation au radiocarbone - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"La datation au carbone 14, \u00e9galement connue sous le nom de datation au radiocarbone, est une m\u00e9thode permettant de d\u00e9terminer l&#039;\u00e2ge d&#039;un objet contenant une mati\u00e8re organique en utilisant les propri\u00e9t\u00e9s du radionucl\u00e9ide carbone 14. 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