{"id":18074,"date":"2020-06-26T17:56:40","date_gmt":"2020-06-26T17:56:40","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-a-serie-neptunio-definicao\/"},"modified":"2020-07-24T05:35:42","modified_gmt":"2020-07-24T05:35:42","slug":"o-que-e-a-serie-neptunio-definicao","status":"publish","type":"post","link":"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-a-serie-neptunio-definicao\/","title":{"rendered":"O que \u00e9 a s\u00e9rie Nept\u00fanio &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-u-clearfix su-u-trim\">A s\u00e9rie de nept\u00fanio \u00e9 uma s\u00e9rie radioativa iniciada com nept\u00fanio-237.\u00a0Seus membros s\u00e3o produzidos artificialmente por rea\u00e7\u00f5es nucleares devido \u00e0 curta meia-vida do nept\u00fanio-237.\u00a0Dosimetria de Radia\u00e7\u00e3o<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<p><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/neptunium-series-decay-chain.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-25242 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/neptunium-series-decay-chain-300x188.png\" alt=\"s\u00e9rie nept\u00fanio - cadeia de deteriora\u00e7\u00e3o\" width=\"300\" height=\"188\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/neptunium-series-decay-chain-300x188.png\" \/><\/a>A\u00a0<strong>s\u00e9rie de nept\u00fanio<\/strong>\u00a0\u00e9 uma s\u00e9rie radioativa iniciada com nept\u00fanio-237.\u00a0Seus membros s\u00e3o produzidos artificialmente por\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/nuclear-reactions\/\">rea\u00e7\u00f5es nucleares<\/a>\u00a0e n\u00e3o ocorrem naturalmente,\u00a0<strong>porque a meia-vida do is\u00f3topo mais antigo da s\u00e9rie \u00e9 curta em compara\u00e7\u00e3o com a idade da Terra.\u00a0<\/strong>Essa cadeia de decaimento radioativo consiste em n\u00facleos at\u00f4micos pesados \u200b\u200be inst\u00e1veis, que\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/\">decaem<\/a>\u00a0atrav\u00e9s de uma sequ\u00eancia de\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/beta-decay-beta-radioactivity\/\">decaimentos\u00a0<\/a><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/alpha-decay-alpha-radioactivity\/\">alfa<\/a>\u00a0e\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/beta-decay-beta-radioactivity\/\">beta<\/a>\u00a0at\u00e9 que um n\u00facleo est\u00e1vel seja alcan\u00e7ado.\u00a0No caso das s\u00e9ries de nept\u00fanios, o n\u00facleo est\u00e1vel \u00e9 o bismuto-209 (com meia-vida de 1,9E19 anos) e o t\u00e1lio-205.<\/p>\n<p>Como o\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/alpha-decay-alpha-radioactivity\/\">decaimento alfa<\/a>\u00a0representa a desintegra\u00e7\u00e3o de um\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/atom-properties-of-atoms\/atomic-nucleus\/parent-nucleus-daughter-nucleus\/\">n\u00facleo pai<\/a>\u00a0para uma filha atrav\u00e9s da emiss\u00e3o do n\u00facleo de um \u00e1tomo de h\u00e9lio (que cont\u00e9m quatro n\u00facleons), existem apenas quatro s\u00e9ries de decaimento.\u00a0Dentro de cada s\u00e9rie, portanto, o n\u00famero de massa dos membros pode ser expresso como quatro vezes um n\u00famero inteiro apropriado (n) mais a constante para essa s\u00e9rie.\u00a0Como resultado, a s\u00e9rie de nept\u00fanio \u00e9 conhecida como a\u00a0<strong>s\u00e9rie 4n + 1<\/strong>\u00a0.<\/p>\n<p>A\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/\">energia<\/a>\u00a0total\u00a0liberada do nept\u00fanio-237 ao t\u00e1lio-205, incluindo a energia perdida para os\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutrino\/\">neutrinos<\/a>\u00a0, \u00e9 de 50,0 MeV.<\/p>\n<p>Em algum tipo de detector de fuma\u00e7a, voc\u00ea pode conhecer radionucl\u00eddeos desta s\u00e9rie.\u00a0Os detectores de fuma\u00e7a por ioniza\u00e7\u00e3o geralmente usam um radiois\u00f3topo, geralmente\u00a0<strong>amer\u00edcio-241<\/strong>\u00a0, para ionizar o ar e detectar fuma\u00e7a.\u00a0Nesse caso, o americium-241 decai para o nept\u00fanio-237 e \u00e9, de fato, um membro da s\u00e9rie de nept\u00fanios.<\/p>\n<h3>Tipos de decaimento na s\u00e9rie Nept\u00fanio<\/h3>\n<p>Dentro de cada s\u00e9rie radioativa, existem dois modos principais de decaimento radioativo:<\/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>Decaimento alfa<\/strong><\/a>\u00a0.\u00a0<strong>O decaimento alfa<\/strong>\u00a0representa a desintegra\u00e7\u00e3o de um<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/atom-properties-of-atoms\/atomic-nucleus\/parent-nucleus-daughter-nucleus\/\">\u00a0n\u00facleo pai<\/a>\u00a0para uma filha atrav\u00e9s da emiss\u00e3o do n\u00facleo de um \u00e1tomo de h\u00e9lio.\u00a0<a title=\"Alpha Particle\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\">As part\u00edculas alfa<\/a>\u00a0consistem em dois pr\u00f3tons e dois<a title=\"N\u00eautron\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0n\u00eautrons<\/a>\u00a0unidos em uma part\u00edcula id\u00eantica a um n\u00facleo de h\u00e9lio.\u00a0Devido \u00e0 sua massa muito grande (mais de 7000 vezes a massa da part\u00edcula beta) e \u00e0 sua carga, ela<strong>\u00a0ioniza<\/strong>\u00a0material<strong>\u00a0pesado<\/strong>\u00a0e tem um<strong>\u00a0alcance muito curto<\/strong>\u00a0.<\/li>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/beta-decay-beta-radioactivity\/\"><strong>Decaimento beta<\/strong><\/a>\u00a0.\u00a0<strong>Decaimento beta<\/strong>\u00a0ou<strong>\u00a0decaimento\u00a0<\/strong><strong>\u03b2<\/strong>\u00a0representa a desintegra\u00e7\u00e3o de um n\u00facleo parental para uma filha atrav\u00e9s da emiss\u00e3o da part\u00edcula beta.\u00a0As part\u00edculas beta s\u00e3o el\u00e9trons ou p\u00f3sitrons de alta energia e alta velocidade emitidos por certos tipos de n\u00facleos radioativos, como o pot\u00e1ssio-40.\u00a0As part\u00edculas beta t\u00eam<strong>\u00a0maior alcance<\/strong>\u00a0de penetra\u00e7\u00e3o do que as part\u00edculas alfa, mas ainda muito menos que os raios gama. As part\u00edculas beta emitidas s\u00e3o uma forma de radia\u00e7\u00e3o ionizante, tamb\u00e9m conhecida como raios beta.\u00a0A produ\u00e7\u00e3o de part\u00edculas beta \u00e9 denominada decaimento beta.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-arrow\" data-anchor=\"References\">\n<div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><\/div>\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A s\u00e9rie de nept\u00fanio \u00e9 uma s\u00e9rie radioativa iniciada com nept\u00fanio-237.\u00a0Seus membros s\u00e3o produzidos artificialmente por rea\u00e7\u00f5es nucleares devido \u00e0 curta meia-vida do nept\u00fanio-237.\u00a0Dosimetria de Radia\u00e7\u00e3o A\u00a0s\u00e9rie de nept\u00fanio\u00a0\u00e9 uma s\u00e9rie radioativa iniciada com nept\u00fanio-237.\u00a0Seus membros s\u00e3o produzidos artificialmente por\u00a0rea\u00e7\u00f5es nucleares\u00a0e n\u00e3o ocorrem naturalmente,\u00a0porque a meia-vida do is\u00f3topo mais antigo da s\u00e9rie \u00e9 curta em &#8230; <a title=\"O que \u00e9 a s\u00e9rie Nept\u00fanio &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-a-serie-neptunio-definicao\/\" aria-label=\"More on O que \u00e9 a s\u00e9rie Nept\u00fanio &#8211; Defini\u00e7\u00e3o\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[51],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>O que \u00e9 a s\u00e9rie Nept\u00fanio - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A s\u00e9rie de nept\u00fanio \u00e9 uma s\u00e9rie radioativa iniciada com nept\u00fanio-237. 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