{"id":17858,"date":"2020-06-22T17:06:41","date_gmt":"2020-06-22T17:06:41","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-o-nucleo-da-liquid-earth-por-que-o-nucleo-e-liquido-definicao\/"},"modified":"2020-07-22T10:52:57","modified_gmt":"2020-07-22T10:52:57","slug":"o-que-e-o-nucleo-da-liquid-earth-por-que-o-nucleo-e-liquido-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-nucleo-da-liquid-earth-por-que-o-nucleo-e-liquido-definicao\/","title":{"rendered":"O que \u00e9 o n\u00facleo da Liquid Earth – Por que o n\u00facleo \u00e9 l\u00edquido? – Defini\u00e7\u00e3o"},"content":{"rendered":"
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N\u00facleo da Terra L\u00edquida.\u00a0Juntamente com o pot\u00e1ssio-40 no manto da Terra, pensa-se que o ur\u00e2nio e o t\u00f3rio s\u00e3o a principal fonte de calor que mant\u00e9m o l\u00edquido do n\u00facleo da Terra.\u00a0Dosimetria de Radia\u00e7\u00e3o<\/div>\n<\/div>\n
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Radia\u00e7\u00e3o terrestre<\/strong>\u00a0refere-se a fontes de radia\u00e7\u00e3o que est\u00e3o no solo, na \u00e1gua, na vegeta\u00e7\u00e3o e no manto da terra.\u00a0Os principais is\u00f3topos preocupantes da\u00a0radia\u00e7\u00e3o terrestre<\/strong>\u00a0s\u00e3o o pot\u00e1ssio, o ur\u00e2nio e os produtos de decomposi\u00e7\u00e3o do ur\u00e2nio, como o t\u00f3rio, o r\u00e1dio e o\u00a0r\u00e1don<\/strong>\u00a0.\u00a0Quando a Terra foi formada, v\u00e1rios elementos radioativos foram formados.\u00a0Ap\u00f3s os quatro bilh\u00f5es de anos, todos os is\u00f3topos de vida mais curta deca\u00edram.\u00a0Mas alguns desses is\u00f3topos t\u00eam meias-vidas muito longas, bilh\u00f5es de anos, e ainda est\u00e3o presentes.\u00a0Esses radionucl\u00eddeos s\u00e3o conhecidos como\u00a0radionucl\u00eddeos primordiais<\/strong>e contribui tamb\u00e9m para a dose anual para um indiv\u00edduo.\u00a0Como a maioria dos is\u00f3topos radioativos naturais \u00e9 pesada, \u00e9 necess\u00e1ria mais de uma desintegra\u00e7\u00e3o antes que um \u00e1tomo est\u00e1vel seja atingido.\u00a0Essa sequ\u00eancia de\u00a0n\u00facleos at\u00f4micos inst\u00e1veis<\/a>\u00a0e seus\u00a0modos de decaimento<\/a>\u00a0, que levam a um n\u00facleo est\u00e1vel, \u00e9 conhecida como\u00a0s\u00e9rie radioativa<\/a>\u00a0.\u00a0Decaimentos radioativos de membros dessas s\u00e9ries geram calor.<\/p>\n

N\u00facleo da Terra L\u00edquida<\/h2>\n

\"Principais<\/a>Todos os tr\u00eas is\u00f3topos<\/strong>\u00a0\u00a0de\u00a0ur\u00e2nio<\/a>\u00a0de\u00a0ocorr\u00eancia natural<\/strong>\u00a0(\u00a0238<\/sup>\u00a0U,\u00a0\u00a0235<\/sup>\u00a0U e\u00a0\u00a0234<\/sup>\u00a0U) e o\u00a0is\u00f3topo de<\/strong>\u00a0t\u00f3rio\u00a0de ocorr\u00eancia natural\u00a0<\/strong>\u00a0t\u00eam\u00a0\u00a0meia-vida muito longa<\/strong>\u00a0\u00a0(por exemplo, 4,47 \u00d7 10\u00a09<\/sup>\u00a0\u00a0anos para\u00a0\u00a0238<\/sup>\u00a0U).\u00a0Devido a essa meia-vida muito longa, o ur\u00e2nio e o t\u00f3rio s\u00e3o\u00a0\u00a0fracamente radioativos<\/strong>\u00a0\u00a0e contribuem para baixos n\u00edveis de radia\u00e7\u00e3o natural do ambiente no ambiente.\u00a0Esses is\u00f3topos s\u00e3o alfa radioativos (emitindo\u00a0\u00a0part\u00edculas alfa<\/a>\u00a0), mas tamb\u00e9m raramente podem sofrer uma\u00a0fiss\u00e3o espont\u00e2nea<\/a>\u00a0.<\/p>\n

Todos os is\u00f3topos de ocorr\u00eancia natural pertencem a\u00a0\u00a0nucl\u00eddeos primordiais<\/a>\u00a0, porque sua meia-vida \u00e9 compar\u00e1vel \u00e0 idade da Terra (~ 4,54 \u00d7 10\u00a09<\/sup>\u00a0\u00a0anos).\u00a0O ur\u00e2nio tem a segunda massa at\u00f4mica mais alta desses nucl\u00eddeos primordiais, mais leve que o\u00a0\u00a0plut\u00f4nio<\/a>\u00a0.\u00a0Al\u00e9m disso, o calor decadente de ur\u00e2nio e t\u00f3rio e seus produtos decadentes (por exemplo, r\u00e1don, r\u00e1dio etc.) contribui para o aquecimento do n\u00facleo da Terra.\u00a0Juntamente com o pot\u00e1ssio-40 no manto da Terra, acredita-se que esses elementos sejam a principal fonte de calor que mant\u00e9m o l\u00edquido do n\u00facleo da Terra.<\/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":"

N\u00facleo da Terra L\u00edquida.\u00a0Juntamente com o pot\u00e1ssio-40 no manto da Terra, pensa-se que o ur\u00e2nio e o t\u00f3rio s\u00e3o a principal fonte de calor que mant\u00e9m o l\u00edquido do n\u00facleo da Terra.\u00a0Dosimetria de Radia\u00e7\u00e3o Radia\u00e7\u00e3o terrestre\u00a0refere-se a fontes de radia\u00e7\u00e3o que est\u00e3o no solo, na \u00e1gua, na vegeta\u00e7\u00e3o e no manto da terra.\u00a0Os principais is\u00f3topos … 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 o n\u00facleo da Liquid Earth - Por que o n\u00facleo \u00e9 l\u00edquido? - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"N\u00facleo da Terra L\u00edquida. 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