{"id":117059,"date":"2022-05-26T11:01:12","date_gmt":"2022-05-26T10:01:12","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-serie-thorium-definition\/"},"modified":"2022-06-01T11:52:01","modified_gmt":"2022-06-01T10:52:01","slug":"quest-ce-que-la-serie-thorium-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-serie-thorium-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la s\u00e9rie Thorium &#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 s\u00e9rie du thorium (ou cascade de thorium) est l&rsquo;une des trois s\u00e9ries radioactives classiques commen\u00e7ant par le thorium-232 d&rsquo;origine naturelle.\u00a0La s\u00e9rie du thorium influence de mani\u00e8re significative la radioactivit\u00e9 des mat\u00e9riaux naturels.\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><a href=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/thorium-series-decay-chain.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-medium wp-image-25241\" src=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/thorium-series-decay-chain-300x191.png\" alt=\"s\u00e9rie thorium - cha\u00eene de d\u00e9sint\u00e9gration\" width=\"300\" height=\"191\" \/><\/a><span>La\u00a0<\/span><strong><span>s\u00e9rie du thorium est l&rsquo;une des trois s\u00e9ries radioactives classiques commen\u00e7ant par\u00a0<\/span><\/strong><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-fuel\/thorium\/thorium-232\/\"><span>le thorium-232<\/span><\/a><span> d&rsquo;origine naturelle.\u00a0Cette cha\u00eene de d\u00e9sint\u00e9gration radioactive est constitu\u00e9e de noyaux atomiques lourds instables qui se\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/\"><span>d\u00e9sint\u00e8grent<\/span><\/a><span>\u00a0par une s\u00e9quence de d\u00e9sint\u00e9grations\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/alpha-decay-alpha-radioactivity\/\"><span>alpha<\/span><\/a><span>\u00a0et\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/beta-decay-beta-radioactivity\/\"><span>b\u00eata<\/span><\/a><span>\u00a0jusqu&rsquo;\u00e0 l&rsquo;obtention d&rsquo;un noyau stable.\u00a0Dans le cas de la s\u00e9rie du thorium, le noyau stable est le plomb-208.<\/span><\/p>\n<p><span>\u00c9tant donn\u00e9 que\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/alpha-decay-alpha-radioactivity\/\"><span>la d\u00e9sint\u00e9gration alpha<\/span><\/a><span>\u00a0repr\u00e9sente la d\u00e9sint\u00e9gration d&rsquo;un\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/atom-properties-of-atoms\/atomic-nucleus\/parent-nucleus-daughter-nucleus\/\"><span>noyau parent<\/span><\/a><span>\u00a0en un noyau fille par l&rsquo;\u00e9mission du noyau d&rsquo;un atome d&rsquo;h\u00e9lium (qui contient quatre nucl\u00e9ons), il n&rsquo;y a que quatre s\u00e9ries de d\u00e9sint\u00e9gration.\u00a0Dans chaque s\u00e9rie, par cons\u00e9quent, le nombre de masse des membres peut \u00eatre exprim\u00e9 comme quatre fois un nombre entier appropri\u00e9 (n) plus la constante pour cette s\u00e9rie.\u00a0En cons\u00e9quence, la\u00a0<\/span><strong><span>s\u00e9rie du thorium<\/span><\/strong><span>\u00a0est connue sous le nom de\u00a0<\/span><strong><span>s\u00e9rie 4n<\/span><\/strong><span>.<\/span><\/p>\n<p><span>L&rsquo;\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/<a href=\"https:\/\/modern-physics.org\/thermodynamics\/\">thermodynamics<\/a>\/what-is-energy-physics\/\u00a0\u00bb><span>\u00e9nergie<\/span><span>\u00a0totale lib\u00e9r\u00e9e du thorium-232 au plomb-208, y compris l&rsquo;\u00e9nergie perdue par les\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutrino\/\"><span>neutrinos<\/span><\/a><span>, est de 42,6 MeV.<\/span><\/p>\n<h3><span>Activit\u00e9 des \u00e9chantillons naturels &#8211; S\u00e9rie Thorium<\/span><\/h3>\n<p><strong><a href=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/sources-geothermal-energy.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-medium wp-image-12149\" src=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/sources-geothermal-energy-300x200.png\" alt=\"Principaux isotopes producteurs de chaleur.\" width=\"300\" height=\"200\" \/><\/a><\/strong><strong><span>La cascade de\u00a0<\/span><\/strong><span><strong>thorium<\/strong>\u00a0influence de mani\u00e8re significative la\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/radioactivity-nuclear-decay\/\"><span>radioactivit\u00e9<\/span><\/a><span>\u00a0(\u00a0<\/span><strong><span>d\u00e9sint\u00e9grations par seconde<\/span><\/strong><span>) des \u00e9chantillons naturels et des mat\u00e9riaux naturels.\u00a0Tous les descendants sont pr\u00e9sents, au moins de mani\u00e8re transitoire, dans tout \u00e9chantillon naturel contenant du thorium, qu&rsquo;il soit m\u00e9tallique, compos\u00e9 ou min\u00e9ral.\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-fuel\/thorium\/thorium-232\/\">Par exemple, le thorium-232<\/a>\u00a0pur<\/span><span>est faiblement radioactif (proportionnel \u00e0 sa longue demi-vie), mais un minerai de thorium est environ 10 fois plus radioactif que le m\u00e9tal thorium-232 pur en raison de ses isotopes descendants (par exemple radon, radium, etc.) qu&rsquo;il contient.\u00a0Non seulement les isotopes instables du radium sont d&rsquo;importants \u00e9metteurs de radioactivit\u00e9, mais en tant qu&rsquo;\u00e9tape suivante de la cha\u00eene de d\u00e9sint\u00e9gration, ils g\u00e9n\u00e8rent \u00e9galement du radon, un gaz radioactif lourd, inerte et naturel.\u00a0De plus, la chaleur de d\u00e9sint\u00e9gration du thorium et de ses produits de d\u00e9sint\u00e9gration (par exemple le radon, le radium, etc.) contribue au r\u00e9chauffement du noyau terrestre.\u00a0Avec l&rsquo;uranium et le potassium 40 dans le manteau terrestre, on pense que ces \u00e9l\u00e9ments sont la principale source de chaleur qui maintient le noyau de la Terre liquide.<\/span><\/p>\n<h3><span>Types de d\u00e9composition dans la s\u00e9rie Thorium<\/span><\/h3>\n<p><span>Au sein de chaque s\u00e9rie radioactive, il existe deux principaux modes de d\u00e9sint\u00e9gration radioactive:<\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/alpha-decay-alpha-radioactivity\/\"><strong><span>D\u00e9sint\u00e9gration alpha<\/span><\/strong><\/a><span>.\u00a0<\/span><strong><span>La d\u00e9sint\u00e9gration alpha<\/span><\/strong><span>\u00a0repr\u00e9sente la d\u00e9sint\u00e9gration d&rsquo;un<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/atom-properties-of-atoms\/atomic-nucleus\/parent-nucleus-daughter-nucleus\/\"><span>\u00a0noyau parent<\/span><\/a><span>\u00a0en un noyau fille par l&rsquo;\u00e9mission du noyau d&rsquo;un atome d&rsquo;h\u00e9lium.\u00a0<\/span><a title=\"Particule alpha\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\"><span>Les particules alpha<\/span><\/a><span>\u00a0sont constitu\u00e9es de deux protons et de deux<\/span><a title=\"Neutron\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\" target=\"_blank\" rel=\"noopener noreferrer\"><span>\u00a0neutrons<\/span><\/a><span>\u00a0li\u00e9s ensemble en une particule identique \u00e0 un noyau d&rsquo;h\u00e9lium.\u00a0Du fait de sa tr\u00e8s grande masse (plus de 7000 fois la masse de la particule b\u00eata) et de sa charge, elle<\/span><strong><span>\u00a0ionise<\/span><\/strong><span>\u00a0la mati\u00e8re lourde et a une<\/span><strong><span>\u00a0port\u00e9e tr\u00e8s courte<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<li><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 b\u00eata<\/span><\/strong><\/a><span>.\u00a0<\/span><strong><span>La d\u00e9sint\u00e9gration b\u00eata<\/span><\/strong><span>\u00a0ou<\/span><strong><span>\u00a0la d\u00e9sint\u00e9gration \u03b2<\/span><\/strong><span>\u00a0repr\u00e9sente la d\u00e9sint\u00e9gration d&rsquo;un noyau parent en un noyau fille par l&rsquo;\u00e9mission de la particule b\u00eata.\u00a0Les particules b\u00eata sont des \u00e9lectrons ou des positrons \u00e0 haute \u00e9nergie et \u00e0 grande vitesse \u00e9mis par certains types de noyaux radioactifs tels que le potassium-40.\u00a0Les particules b\u00eata ont<\/span><strong><span>\u00a0une plus grande plage<\/span><\/strong><span>\u00a0de p\u00e9n\u00e9tration que les particules alpha, mais encore beaucoup moins que les rayons gamma. Les particules b\u00eata \u00e9mises sont une forme de rayonnement ionisant \u00e9galement connu sous le nom de rayons b\u00eata.\u00a0La production de particules b\u00eata est appel\u00e9e d\u00e9sint\u00e9gration b\u00eata.<\/span><\/li>\n<\/ul>\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>S\u00e9rie radioactive<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radioactive-decay-chain\/radioactive-series-radioactive-cascade \/\" 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>S\u00e9rie Thorium<\/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,\u00a0S\u00e9rie Thorium, 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 s\u00e9rie Thorium - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"La s\u00e9rie du thorium (ou cascade de thorium) est l&#039;une des trois s\u00e9ries radioactives classiques commen\u00e7ant par le thorium-232 d&#039;origine naturelle. La s\u00e9rie du thorium influence de mani\u00e8re significative la radioactivit\u00e9 des mat\u00e9riaux naturels. Tableau p\u00e9riodique\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/material-properties.org\/fr\/quest-ce-que-la-serie-thorium-definition\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qu&#039;est-ce que la s\u00e9rie Thorium - D\u00e9finition\" \/>\n<meta property=\"og:description\" content=\"La s\u00e9rie du thorium (ou cascade de thorium) est l&#039;une des trois s\u00e9ries radioactives classiques commen\u00e7ant par le thorium-232 d&#039;origine naturelle. La s\u00e9rie du thorium influence de mani\u00e8re significative la radioactivit\u00e9 des mat\u00e9riaux naturels. 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