{"id":18222,"date":"2020-06-27T12:15:16","date_gmt":"2020-06-27T12:15:16","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/"},"modified":"2020-07-24T10:24:40","modified_gmt":"2020-07-24T10:24:40","slug":"o-que-e-o-modo-de-decaimento-radioativo-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/","title":{"rendered":"O que \u00e9 o Modo de Decaimento Radioativo &#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\">Existem muitos modos de decaimento radioativo.\u00a0O decaimento nuclear (decaimento radioativo) ocorre quando um \u00e1tomo inst\u00e1vel perde energia emitindo radia\u00e7\u00e3o ionizante.\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><strong>O decaimento nuclear (decaimento radioativo)<\/strong>\u00a0ocorre quando um \u00e1tomo inst\u00e1vel perde energia emitindo\u00a0<strong>radia\u00e7\u00e3o ionizante<\/strong>\u00a0.\u00a0O decaimento radioativo \u00e9\u00a0<strong>um processo aleat\u00f3rio<\/strong>\u00a0no n\u00edvel de \u00e1tomos \u00fanicos, pois, segundo a teoria qu\u00e2ntica, \u00e9 imposs\u00edvel prever quando um \u00e1tomo em particular decair\u00e1.\u00a0Durante o decaimento radioativo, um\u00a0<strong>n\u00facleo inst\u00e1vel se decomp\u00f5e espontaneamente e aleatoriamente<\/strong>\u00a0para formar um n\u00facleo diferente (ou um estado de energia diferente &#8211; decaimento gama), emitindo radia\u00e7\u00e3o na forma de part\u00edculas at\u00f4micas ou raios de alta energia.\u00a0Esse decaimento ocorre a uma taxa constante e previs\u00edvel, denominada meia-vida.\u00a0Um n\u00facleo est\u00e1vel n\u00e3o sofrer\u00e1 esse tipo de decaimento e, portanto, n\u00e3o ser\u00e1 radioativo.\u00a0Existem muitos modos de decaimento radioativo:<\/p>\n<ul>\n<li>\n<figure id=\"attachment_119\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-119\"><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/notation_nuclear_reactions.jpg\"><img loading=\"lazy\" class=\"size-medium wp-image-119 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/notation_nuclear_reactions-300x293.jpg\" alt=\"Nota\u00e7\u00e3o de rea\u00e7\u00f5es nucleares - decaimentos radioativos\" width=\"300\" height=\"293\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/notation_nuclear_reactions-300x293.jpg\" \/><\/a><figcaption id=\"caption-attachment-119\" class=\"wp-caption-text\">Nota\u00e7\u00e3o de rea\u00e7\u00f5es nucleares &#8211; decaimentos radioativos<br \/>\nFonte: chemwiki.ucdavis.edu<\/figcaption><\/figure>\n<p><strong>Radioatividade alfa<\/strong>\u00a0.\u00a0Decaimento alfa \u00e9 a emiss\u00e3o de part\u00edculas alfa (n\u00facleos de h\u00e9lio).\u00a0<a href=\"http:\/\/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\u00a0<a href=\"http:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\">n\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\u00a0<strong>ioniza<\/strong>\u00a0material\u00a0<strong>pesado<\/strong>\u00a0e tem um\u00a0<strong>alcance muito curto<\/strong>\u00a0.<\/li>\n<li><strong>Radioatividade beta<\/strong>\u00a0.\u00a0O decaimento beta \u00e9 a emiss\u00e3o de\u00a0<a href=\"http:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/\">part\u00edculas beta<\/a>\u00a0.\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\u00a0<strong>maior 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<li><strong>Radioatividade gama<\/strong>\u00a0.\u00a0A radioatividade gama consiste em raios gama.\u00a0<a href=\"http:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\">Os raios gama<\/a>\u00a0s\u00e3o radia\u00e7\u00e3o eletromagn\u00e9tica (f\u00f3tons de alta energia) de frequ\u00eancia muito alta e de alta energia.\u00a0Eles s\u00e3o produzidos pela decad\u00eancia dos n\u00facleos \u00e0 medida que passam de um estado de alta energia para um estado inferior, conhecido como decaimento gama.\u00a0A maioria das rea\u00e7\u00f5es nucleares \u00e9 acompanhada por emiss\u00e3o gama.<\/li>\n<li><strong>Emiss\u00e3o de n\u00eautrons<\/strong>\u00a0.\u00a0A emiss\u00e3o de n\u00eautrons \u00e9 um tipo de decaimento radioativo de n\u00facleos contendo excesso de\u00a0<a href=\"http:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\">n\u00eautrons<\/a>\u00a0(especialmente produtos de fiss\u00e3o), nos quais um n\u00eautron \u00e9 simplesmente ejetado do n\u00facleo.\u00a0Esse tipo de radia\u00e7\u00e3o desempenha papel fundamental no\u00a0<strong>controle do reator nuclear<\/strong>\u00a0, porque esses n\u00eautrons s\u00e3o\u00a0<a href=\"http:\/\/www.nuclear-power.com\/nuclear-power\/fission\/delayed-neutrons\/\"><strong>n\u00eautrons atrasados<\/strong><\/a>\u00a0.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\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<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>Existem muitos modos de decaimento radioativo.\u00a0O decaimento nuclear (decaimento radioativo) ocorre quando um \u00e1tomo inst\u00e1vel perde energia emitindo radia\u00e7\u00e3o ionizante.\u00a0Dosimetria de Radia\u00e7\u00e3o O decaimento nuclear (decaimento radioativo)\u00a0ocorre quando um \u00e1tomo inst\u00e1vel perde energia emitindo\u00a0radia\u00e7\u00e3o ionizante\u00a0.\u00a0O decaimento radioativo \u00e9\u00a0um processo aleat\u00f3rio\u00a0no n\u00edvel de \u00e1tomos \u00fanicos, pois, segundo a teoria qu\u00e2ntica, \u00e9 imposs\u00edvel prever quando um \u00e1tomo &#8230; <a title=\"O que \u00e9 o Modo de Decaimento Radioativo &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/\" aria-label=\"More on O que \u00e9 o Modo de Decaimento Radioativo &#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 o Modo de Decaimento Radioativo - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Existem muitos modos de decaimento radioativo. O decaimento nuclear (decaimento radioativo) ocorre quando um \u00e1tomo inst\u00e1vel perde energia emitindo radia\u00e7\u00e3o ionizante. Dosimetria de Radia\u00e7\u00e3o\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"O que \u00e9 o Modo de Decaimento Radioativo - Defini\u00e7\u00e3o\" \/>\n<meta property=\"og:description\" content=\"Existem muitos modos de decaimento radioativo. O decaimento nuclear (decaimento radioativo) ocorre quando um \u00e1tomo inst\u00e1vel perde energia emitindo radia\u00e7\u00e3o ionizante. Dosimetria de Radia\u00e7\u00e3o\" \/>\n<meta property=\"og:url\" content=\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/\" \/>\n<meta property=\"og:site_name\" content=\"Radiation Dosimetry\" \/>\n<meta property=\"article:published_time\" content=\"2020-06-27T12:15:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-07-24T10:24:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/notation_nuclear_reactions-300x293.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\">\n\t<meta name=\"twitter:data1\" content=\"Nick Connor\">\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\">\n\t<meta name=\"twitter:data2\" content=\"2 minutos\">\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.radiation-dosimetry.org\/#website\",\"url\":\"https:\/\/www.radiation-dosimetry.org\/\",\"name\":\"Radiation Dosimetry\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/www.radiation-dosimetry.org\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-BR\"},{\"@type\":\"ImageObject\",\"@id\":\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/#primaryimage\",\"inLanguage\":\"pt-BR\",\"url\":\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/notation_nuclear_reactions-300x293.jpg\"},{\"@type\":\"WebPage\",\"@id\":\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/#webpage\",\"url\":\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/\",\"name\":\"O que \\u00e9 o Modo de Decaimento Radioativo - Defini\\u00e7\\u00e3o\",\"isPartOf\":{\"@id\":\"https:\/\/www.radiation-dosimetry.org\/#website\"},\"primaryImageOfPage\":{\"@id\":\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/#primaryimage\"},\"datePublished\":\"2020-06-27T12:15:16+00:00\",\"dateModified\":\"2020-07-24T10:24:40+00:00\",\"author\":{\"@id\":\"https:\/\/www.radiation-dosimetry.org\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\"},\"description\":\"Existem muitos modos de decaimento radioativo. O decaimento nuclear (decaimento radioativo) ocorre quando um \\u00e1tomo inst\\u00e1vel perde energia emitindo radia\\u00e7\\u00e3o ionizante. Dosimetria de Radia\\u00e7\\u00e3o\",\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-modo-de-decaimento-radioativo-definicao\/\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.radiation-dosimetry.org\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\",\"name\":\"Nick Connor\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","_links":{"self":[{"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/posts\/18222"}],"collection":[{"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/comments?post=18222"}],"version-history":[{"count":0,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/posts\/18222\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/media?parent=18222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/categories?post=18222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/tags?post=18222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}