{"id":17827,"date":"2020-06-22T08:12:00","date_gmt":"2020-06-22T08:12:00","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-tritio-na-natureza-decaimento-dose-definicao\/"},"modified":"2020-07-22T10:13:02","modified_gmt":"2020-07-22T10:13:02","slug":"o-que-e-tritio-na-natureza-decaimento-dose-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-tritio-na-natureza-decaimento-dose-definicao\/","title":{"rendered":"O que \u00e9 Tr\u00edtio na Natureza &#8211; Decaimento &#8211; Dose &#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\">O tr\u00edtio \u00e9 o \u00fanico radiois\u00f3topo de hidrog\u00eanio que ocorre naturalmente.\u00a0Uma dose m\u00e9dia anual da ingest\u00e3o natural de tr\u00edtio \u00e9 de 0,01 \u03bcSv.\u00a0Tr\u00edtio na natureza &#8211; decomposi\u00e7\u00e3o &#8211; dose<\/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 tr\u00edtio<\/strong>\u00a0\u00e9 o \u00fanico\u00a0<strong>radiois\u00f3topo<\/strong>\u00a0de hidrog\u00eanio que\u00a0ocorre naturalmente\u00a0.\u00a0Seu n\u00famero at\u00f4mico \u00e9 naturalmente 1, o que significa que h\u00e1 1 pr\u00f3ton e 1 el\u00e9tron na estrutura at\u00f4mica.\u00a0Ao contr\u00e1rio do n\u00facleo de hidrog\u00eanio e n\u00facleo de deut\u00e9rio, o tr\u00edtio possui\u00a0<strong>2\u00a0<\/strong><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\"><strong>n\u00eautrons<\/strong><\/a>\u00a0no n\u00facleo.\u00a0O tr\u00edtio ocorre naturalmente, mas \u00e9\u00a0<strong>extremamente raro<\/strong>\u00a0.<\/p>\n<p>O tr\u00edtio \u00e9 produzido na atmosfera quando os raios c\u00f3smicos colidem com as mol\u00e9culas de ar.\u00a0Na rea\u00e7\u00e3o mais importante para a produ\u00e7\u00e3o natural, um n\u00eautron r\u00e1pido (que deve ter energia superior a 4,0 MeV) interage com o nitrog\u00eanio atmosf\u00e9rico:<\/p>\n<p><a href=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/tritium-cosmogenic-radionuclide.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-25833 lazy-loaded\" src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/tritium-cosmogenic-radionuclide.png\" alt=\"\" width=\"267\" height=\"62\" data-lazy-type=\"image\" data-src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/tritium-cosmogenic-radionuclide.png\" \/><\/a><\/p>\n<p>Em todo o mundo, a produ\u00e7\u00e3o de tr\u00edtio a partir de fontes naturais \u00e9 de 148 petabecquerels por ano.\u00a0Como resultado, a \u00e1gua tritiada produzida participa do ciclo da \u00e1gua.<\/p>\n<ul>\n<li>cerca de 400 Bq \/ m\u00a0<sup>3<\/sup>\u00a0em \u00e1gua continental<\/li>\n<li>cerca de 100 Bq \/ m\u00a0<sup>3<\/sup>\u00a0nos oceanos<\/li>\n<\/ul>\n<p><strong>O tr\u00edtio<\/strong>\u00a0\u00e9 um is\u00f3topo radioativo, mas emite uma forma muito fraca de radia\u00e7\u00e3o, uma\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/\">part\u00edcula beta de<\/a>\u00a0baixa energia\u00a0que \u00e9 semelhante a um el\u00e9tron.\u00a0\u00c9 um emissor beta puro (ou seja, emissor beta sem uma\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\">radia\u00e7\u00e3o gama que o<\/a>\u00a0acompanha\u00a0).\u00a0A energia cin\u00e9tica do el\u00e9tron varia, com uma m\u00e9dia de 5,7 keV, enquanto a energia restante \u00e9 transportada pelo\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/antineutrino\/\">antineutrino do<\/a>\u00a0el\u00e9tron quase indetect\u00e1vel\u00a0.\u00a0Uma energia t\u00e3o baixa de el\u00e9trons causa que o el\u00e9tron n\u00e3o pode penetrar na pele ou nem mesmo viaja muito longe no ar.\u00a0As part\u00edculas beta do tr\u00edtio podem penetrar apenas cerca de 6,0 mm de ar.\u00a0O tr\u00edtio decai por via beta negativo em h\u00e9lio-3 com meia-vida de\u00a0<strong>12,3 anos<\/strong>\u00a0.<\/p>\n<p><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Tritium-Decay.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-11808 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Tritium-Decay.png\" alt=\"Decaimento do Tr\u00edtio\" width=\"295\" height=\"79\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Tritium-Decay.png\" \/><\/a>Portanto, o tr\u00edtio representa um risco para a sa\u00fade como resultado da exposi\u00e7\u00e3o interna somente ap\u00f3s ingest\u00e3o de \u00e1gua pot\u00e1vel ou comida, inala\u00e7\u00e3o ou absor\u00e7\u00e3o pela pele.\u00a0O tr\u00edtio tomado no corpo \u00e9 distribu\u00eddo uniformemente entre todos os tecidos moles.\u00a0Uma dose m\u00e9dia anual da ingest\u00e3o natural de tr\u00edtio \u00e9 de\u00a0<strong>0,01 \u03bcSv<\/strong>\u00a0.<\/p>\n<p>No caso de ingest\u00e3o ou inala\u00e7\u00e3o artificial de tr\u00edtio, um intervalo biol\u00f3gico de tr\u00edtio \u00e9 de 10 dias para HTO e 40 dias para OBT (tr\u00edtio ligado organicamente) formado a partir de HTO no corpo de adultos.\u00a0Tamb\u00e9m foi demonstrado que o\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radioactive-decay-law\/half-life\/biological-half-life\/\">intervalo biol\u00f3gico<\/a>\u00a0do HTO depende fortemente de muitas vari\u00e1veis \u200b\u200be varia de cerca de 4 a 18 dias.\u00a0Durante os meses mais quentes, a meia-vida m\u00e9dia \u00e9 menor, o que \u00e9 atribu\u00eddo ao aumento da ingest\u00e3o de \u00e1gua.\u00a0Al\u00e9m disso, beber grandes quantidades de \u00e1lcool reduzir\u00e1 a meia-vida biol\u00f3gica da \u00e1gua no corpo.<\/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<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>O tr\u00edtio \u00e9 o \u00fanico radiois\u00f3topo de hidrog\u00eanio que ocorre naturalmente.\u00a0Uma dose m\u00e9dia anual da ingest\u00e3o natural de tr\u00edtio \u00e9 de 0,01 \u03bcSv.\u00a0Tr\u00edtio na natureza &#8211; decomposi\u00e7\u00e3o &#8211; dose O tr\u00edtio\u00a0\u00e9 o \u00fanico\u00a0radiois\u00f3topo\u00a0de hidrog\u00eanio que\u00a0ocorre naturalmente\u00a0.\u00a0Seu n\u00famero at\u00f4mico \u00e9 naturalmente 1, o que significa que h\u00e1 1 pr\u00f3ton e 1 el\u00e9tron na estrutura at\u00f4mica.\u00a0Ao contr\u00e1rio &#8230; <a title=\"O que \u00e9 Tr\u00edtio na Natureza &#8211; Decaimento &#8211; Dose &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-tritio-na-natureza-decaimento-dose-definicao\/\" aria-label=\"More on O que \u00e9 Tr\u00edtio na Natureza &#8211; Decaimento &#8211; Dose &#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 Tr\u00edtio na Natureza - Decaimento - Dose - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"O tr\u00edtio \u00e9 o \u00fanico radiois\u00f3topo de hidrog\u00eanio que ocorre naturalmente. 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