{"id":18158,"date":"2020-06-27T05:12:54","date_gmt":"2020-06-27T05:12:54","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-a-lei-geiger-nuttall-definicao\/"},"modified":"2020-07-24T09:56:05","modified_gmt":"2020-07-24T09:56:05","slug":"o-que-e-a-lei-geiger-nuttall-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-a-lei-geiger-nuttall-definicao\/","title":{"rendered":"O que \u00e9 a lei Geiger-Nuttall – Defini\u00e7\u00e3o"},"content":{"rendered":"
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A lei Geiger-Nuttall \u00e9 uma lei semi-emp\u00edrica que expressa a vida \u00fatil (meia-vida) do emissor alfa em termos de energia da part\u00edcula alfa liberada.\u00a0Em outras palavras, afirma que os is\u00f3topos de vida curta emitem part\u00edculas alfa mais energ\u00e9ticas do que as de vida longa.\u00a0Dosimetria de Radia\u00e7\u00e3o<\/div>\n<\/div>\n
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Lei Geiger-Nuttall<\/h2>\n

A lei de Geiger-Nuttall \u00e9 uma lei semi-emp\u00edrica que expressa a vida \u00fatil (meia-vida) do emissor alfa em termos de energia da part\u00edcula alfa liberada.\u00a0Em outras palavras, afirma que os is\u00f3topos de vida curta emitem part\u00edculas alfa mais energ\u00e9ticas do que as de vida longa.\u00a0Esta regra foi formulada por Hans Geiger e John Mitchell Nuttall em 1911 antes do desenvolvimento da formula\u00e7\u00e3o te\u00f3rica.\u00a0A lei de Geiger-Nuttall pode ser matematicamente expressa como:<\/p>\n

\"Lei<\/a><\/p>\n

onde\u00a0um<\/strong>\u00a0e\u00a0b<\/strong>\u00a0s\u00e3o constantes emp\u00edricas que s\u00e3o encontrados a partir de gr\u00e1ficos logar\u00edtmicas de dados experimentais.\u00a0R\u00a0\u03b1<\/sub>\u00a0representa a faixa linear da part\u00edcula alfa, portanto \u00e9 uma medida direta da\u00a0energia cin\u00e9tica<\/a>\u00a0da part\u00edcula alfa.\u00a0A largura da\u00a0resson\u00e2ncia<\/a>\u00a0(\u0393) est\u00e1 geralmente relacionada ao tempo m\u00e9dio de vida (\u03c4) do n\u00facleo excitado pela rela\u00e7\u00e3o: \u0393 = \u210f \/ \u03c4<\/p>\n

Em 1928,\u00a0George Gamow<\/strong>\u00a0(e independentemente por\u00a0Ronald Gurney<\/strong>\u00a0e\u00a0Edward Condon<\/strong>\u00a0) havia resolvido a teoria do\u00a0decaimento alfa<\/strong>\u00a0via\u00a0tunelamento qu\u00e2ntico<\/strong>\u00a0.\u00a0Usando o mecanismo de tunelamento, Gamow, Condon e Gurney calcularam a penetrabilidade da part\u00edcula \u03b1 do tunelamento atrav\u00e9s da barreira de Coulomb, encontrando a vida \u00fatil de alguns n\u00facleos emissores de \u03b1.\u00a0O principal sucesso desse modelo foi a reprodu\u00e7\u00e3o da lei semi-emp\u00edrica de Geiger-Nuttall, que expressa a vida \u00fatil dos emissores \u03b1 em termos de energia das part\u00edculas \u03b1 liberadas.<\/p>\n<\/div>\n<\/div>\n

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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":"

A lei Geiger-Nuttall \u00e9 uma lei semi-emp\u00edrica que expressa a vida \u00fatil (meia-vida) do emissor alfa em termos de energia da part\u00edcula alfa liberada.\u00a0Em outras palavras, afirma que os is\u00f3topos de vida curta emitem part\u00edculas alfa mais energ\u00e9ticas do que as de vida longa.\u00a0Dosimetria de Radia\u00e7\u00e3o Lei Geiger-Nuttall A lei de Geiger-Nuttall \u00e9 uma lei … 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":"\nO que \u00e9 a lei Geiger-Nuttall - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A lei Geiger-Nuttall \u00e9 uma lei semi-emp\u00edrica que expressa a vida \u00fatil (meia-vida) do emissor alfa em termos de energia da part\u00edcula alfa liberada. Em outras palavras, afirma que os is\u00f3topos de vida curta emitem part\u00edculas alfa mais energ\u00e9ticas do que as de vida longa. 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=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-a-lei-geiger-nuttall-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 a lei Geiger-Nuttall - Defini\u00e7\u00e3o\" \/>\n<meta property=\"og:description\" content=\"A lei Geiger-Nuttall \u00e9 uma lei semi-emp\u00edrica que expressa a vida \u00fatil (meia-vida) do emissor alfa em termos de energia da part\u00edcula alfa liberada. Em outras palavras, afirma que os is\u00f3topos de vida curta emitem part\u00edculas alfa mais energ\u00e9ticas do que as de vida longa. 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