{"id":21608,"date":"2020-07-20T15:35:02","date_gmt":"2020-07-20T15:35:02","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-exposicao-externa-contaminacao-externa-definicao\/"},"modified":"2020-07-20T15:37:12","modified_gmt":"2020-07-20T15:37:12","slug":"o-que-e-exposicao-externa-contaminacao-externa-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-exposicao-externa-contaminacao-externa-definicao\/","title":{"rendered":"O que \u00e9 Exposi\u00e7\u00e3o Externa &#8211; Contamina\u00e7\u00e3o Externa &#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\">Para exposi\u00e7\u00e3o externa, n\u00e3o podemos usar alguns dos princ\u00edpios de prote\u00e7\u00e3o contra radia\u00e7\u00e3o (tempo, dist\u00e2ncia, blindagem).\u00a0Contamina\u00e7\u00e3o externa significa que material radioativo foi depositado em superf\u00edcies (como roupas, sapatos).\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<h2>Capta\u00e7\u00e3o de Dose Externa<\/h2>\n<p><strong>Exposi\u00e7\u00e3o externa<\/strong>\u00a0\u00e9 radia\u00e7\u00e3o que vem de fora do nosso corpo e interage conosco.\u00a0Nesse caso, analisamos predominantemente a exposi\u00e7\u00e3o a raios gama, uma vez que as part\u00edculas alfa e beta, em geral, n\u00e3o constituem risco de exposi\u00e7\u00e3o externa, porque as part\u00edculas geralmente n\u00e3o passam pela pele.\u00a0A fonte de radia\u00e7\u00e3o pode ser, por exemplo, um equipamento que produz a radia\u00e7\u00e3o como um recipiente com materiais radioativos ou como uma m\u00e1quina de raio-x.\u00a0Na prote\u00e7\u00e3o contra radia\u00e7\u00e3o, existem tr\u00eas maneiras de proteger as pessoas de fontes externas de radia\u00e7\u00e3o identificadas:<\/p>\n<ul>\n<li>\n<figure id=\"attachment_12696\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-12696\"><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/radiation_protection_principles.gif\"><img loading=\"lazy\" class=\"size-medium wp-image-12696 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Ionization-Detector-Geiger-Tube-300x178.png\" alt=\"pronciples de prote\u00e7\u00e3o contra radia\u00e7\u00e3o - tempo, dist\u00e2ncia, blindagem\" width=\"300\" height=\"233\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Ionization-Detector-Geiger-Tube-300x178.png\" \/><\/a><figcaption id=\"caption-attachment-12696\" class=\"wp-caption-text\">Princ\u00edpios de prote\u00e7\u00e3o contra radia\u00e7\u00e3o &#8211; tempo, dist\u00e2ncia e blindagem<\/figcaption><\/figure>\n<p><strong>Limitando o tempo.\u00a0<\/strong>A quantidade de exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o depende diretamente (linearmente)\u00a0<strong>do tempo que as<\/strong>\u00a0pessoas passam perto da fonte de radia\u00e7\u00e3o.\u00a0A dose pode ser\u00a0<strong>reduzida limitando o tempo de exposi\u00e7\u00e3o<\/strong>\u00a0.<\/li>\n<li><strong>Dist\u00e2ncia.\u00a0<\/strong>A quantidade de exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o depende da dist\u00e2ncia da fonte de radia\u00e7\u00e3o.\u00a0Da mesma forma que o calor do fogo, se voc\u00ea estiver muito pr\u00f3ximo, a intensidade da radia\u00e7\u00e3o de calor \u00e9 alta e voc\u00ea pode se queimar.\u00a0Se voc\u00ea estiver na dist\u00e2ncia certa, poder\u00e1 resistir a ela sem problemas e, al\u00e9m disso, \u00e9 confort\u00e1vel.\u00a0Se voc\u00ea estiver muito longe da fonte de calor, a insufici\u00eancia de calor tamb\u00e9m poder\u00e1 prejudic\u00e1-lo.\u00a0Essa analogia, em certo sentido, pode ser aplicada \u00e0 radia\u00e7\u00e3o tamb\u00e9m de fontes de radia\u00e7\u00e3o.<\/li>\n<li><strong>Blindagem.\u00a0<\/strong>Finalmente, se a fonte for muito intensiva e o tempo ou a dist\u00e2ncia n\u00e3o fornecerem prote\u00e7\u00e3o suficiente contra radia\u00e7\u00e3o, a blindagem deve ser usada.\u00a0A prote\u00e7\u00e3o contra radia\u00e7\u00e3o geralmente consiste em barreiras de chumbo, concreto ou \u00e1gua.\u00a0Existem muitos materiais que podem ser usados \u200b\u200bpara prote\u00e7\u00e3o contra radia\u00e7\u00e3o, mas existem muitas situa\u00e7\u00f5es em prote\u00e7\u00e3o contra radia\u00e7\u00e3o.\u00a0Depende muito do tipo de radia\u00e7\u00e3o a ser protegida, de sua energia e de muitos outros par\u00e2metros.\u00a0Por exemplo, at\u00e9 o ur\u00e2nio empobrecido pode ser usado como uma boa prote\u00e7\u00e3o contra a radia\u00e7\u00e3o gama, mas, por outro lado, o ur\u00e2nio \u00e9 uma\u00a0<a href=\"http:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/shielding-neutron-radiation\/\">blindagem<\/a>\u00a0absolutamente inadequada\u00a0<a href=\"http:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/shielding-neutron-radiation\/\">da radia\u00e7\u00e3o de n\u00eautrons<\/a>\u00a0.<\/li>\n<\/ul>\n<p><span>Como foi escrito, \u00e9 crucial se estamos expostos \u00e0 radia\u00e7\u00e3o de fontes externas ou de fontes internas.\u00a0\u00c9 semelhante ao de outras subst\u00e2ncias perigosas.\u00a0A exposi\u00e7\u00e3o interna \u00e9 mais perigosa do que a externa, j\u00e1 que estamos carregando a fonte de radia\u00e7\u00e3o dentro de nossos corpos e n\u00e3o podemos usar nenhum dos\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/\"><span>princ\u00edpios de prote\u00e7\u00e3o contra radia\u00e7\u00e3o<\/span><\/a><span>\u00a0(tempo, dist\u00e2ncia, blindagem).<\/span><\/p>\n<figure id=\"attachment_24861\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-24861\"><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/ionizing-radiation-hazard-symbol-1.png\"><img loading=\"lazy\" class=\"size-full wp-image-24861 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/ionizing-radiation-hazard-symbol-1.png\" alt=\"radia\u00e7\u00e3o ionizante - s\u00edmbolo de perigo\" width=\"220\" height=\"192\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/ionizing-radiation-hazard-symbol-1.png\" \/><\/a><figcaption id=\"caption-attachment-24861\" class=\"wp-caption-text\"><span>radia\u00e7\u00e3o ionizante &#8211; s\u00edmbolo de perigo<\/span><\/figcaption><\/figure>\n<h2><span>Exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o<\/span><\/h2>\n<p><span>Em geral,\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/radiation-exposure\/\"><strong><span>a exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o<\/span><\/strong><\/a><span>\u00a0\u00a0\u00e9 uma medida da ioniza\u00e7\u00e3o do\u00a0\u00a0<\/span><strong><span>ar<\/span><\/strong><span>\u00a0\u00a0devido \u00e0 radia\u00e7\u00e3o ionizante de\u00a0<\/span><strong><span>f\u00f3tons<\/span><\/strong><span>\u00a0de\u00a0\u00a0<strong>alta energia<\/strong>\u00a0(raios X e raios gama).\u00a0<\/span><strong><span>A exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o<\/span><\/strong><span>\u00a0\u00a0\u00e9 definida como a\u00a0\u00a0<\/span><strong><span>soma das cargas el\u00e9tricas<\/span><\/strong><span>\u00a0\u00a0(\u2206q) em todos os \u00edons de um sinal produzido\u00a0\u00a0<\/span><strong><span>no ar<\/span><\/strong><span>\u00a0\u00a0quando todos os el\u00e9trons, liberados pelos f\u00f3tons em um volume de ar cuja massa \u00e9 \u2206m, s\u00e3o completamente parados no ar.<\/span><\/p>\n<p><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/radiation-exposure-definition.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-25336 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/radiation-exposure-definition.png\" alt=\"exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o - defini\u00e7\u00e3o\" width=\"165\" height=\"76\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/radiation-exposure-definition.png\" \/><\/a><\/p>\n<p><strong><span>A exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o<\/span><\/strong><span>\u00a0\u00a0\u00e9 dado o s\u00edmbolo\u00a0\u00a0<\/span><strong><span>X<\/span><\/strong><span>\u00a0.\u00a0A unidade SI de exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o \u00e9 o coulomb por quilograma (C \/ kg), mas, na pr\u00e1tica, o\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/radiation-exposure\/roentgen-unit-of-exposure\/\"><strong><span>roentgen<\/span><\/strong><\/a><span>\u00a0\u00a0\u00e9 usado.\u00a0O\u00a0\u00a0<\/span><strong><span>roentgen<\/span><\/strong><span>\u00a0, abreviado\u00a0\u00a0<\/span><strong><span>R<\/span><\/strong><span>\u00a0, \u00e9 a unidade de exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o.\u00a0Na defini\u00e7\u00e3o original,\u00a0\u00a0<\/span><strong><span>1 R<\/span><\/strong><span>\u00a0\u00a0significa a quantidade de\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/x-rays-roentgen-radiation\/\"><span>raios X<\/span><\/a><span>\u00a0\u00a0ou\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\"><span>radia\u00e7\u00e3o \u03b3<\/span><\/a><span>\u00a0\u00a0necess\u00e1ria para liberar cargas positivas e negativas de uma unidade eletrost\u00e1tica de carga (esu) em 1 cm\u00b3 de ar seco \u00e0 temperatura e press\u00e3o padr\u00e3o (STP).<\/span><\/p>\n<h2><span>Dose absorvida e equivalente<\/span><\/h2>\n<p><span>Na prote\u00e7\u00e3o contra radia\u00e7\u00e3o, o\u00a0\u00a0<\/span><strong><span>sievert<\/span><\/strong><span>\u00a0\u00a0\u00e9 uma unidade derivada de\u00a0\u00a0<\/span><strong><span>dose equivalente<\/span><\/strong><span>\u00a0\u00a0e\u00a0<\/span><strong><span>\u00a0dose efetiva.\u00a0<\/span><\/strong><span>\u00a0O sievert representa o efeito biol\u00f3gico equivalente ao dep\u00f3sito de um joule de energia de raios gama em um quilograma de tecido humano.\u00a0<\/span><strong><span>Dose<\/span><\/strong><span>\u00a0absorvida\u00a0\u00a0\u00e9 definida como a quantidade de energia depositada pela radia\u00e7\u00e3o ionizante em uma subst\u00e2ncia.\u00a0<\/span><strong><span>Dose absorvida<\/span><\/strong><span>\u00a0\u00a0\u00e9 dado o s\u00edmbolo\u00a0\u00a0<\/span><strong><span>D<\/span><\/strong><span>\u00a0.\u00a0A dose absorvida \u00e9 geralmente medida em uma unidade chamada\u00a0\u00a0<\/span><strong><span>cinza<\/span><\/strong><span>\u00a0\u00a0(Gy), que \u00e9 derivada do sistema SI.\u00a0\u00a0\u00c0s vezes, o\u00a0<\/span><strong><span>rad<\/span><\/strong><span>\u00a0n\u00e3o-SI unit\u00a0\u00a0tamb\u00e9m \u00e9 usado, predominantemente nos EUA.<\/span><\/p>\n<p><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-definition.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-25307 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-definition.png\" alt=\"dose absorvida - defini\u00e7\u00e3o\" width=\"180\" height=\"72\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-definition.png\" \/><\/a><\/p>\n<p><span>Para\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/\"><span>protec\u00e7\u00e3o contra as radia\u00e7\u00f5es<\/span><\/a><span>\u00a0\u00a0fins, a dose absorvida \u00e9 calculada a m\u00e9dia ao longo de um \u00f3rg\u00e3o ou tecido, T, e esta absorvida m\u00e9dia dose \u00e9 ponderado para a qualidade de radia\u00e7\u00e3o em termos do\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/equivalent-dose\/radiation-weighting-factor\/\"><strong><span>factor de pondera\u00e7\u00e3o da radia\u00e7\u00e3o<\/span><\/strong><\/a><span>\u00a0, W\u00a0<\/span><sub><span>R<\/span><\/sub><span>\u00a0, para o tipo e a energia da radia\u00e7\u00e3o incidente sobre o corpo.\u00a0O\u00a0<\/span><strong><span>\u00a0fator de pondera\u00e7\u00e3o da radia\u00e7\u00e3o<\/span><\/strong><span>\u00a0\u00a0\u00e9 um fator adimensional usado para determinar a dose equivalente da dose absorvida m\u00e9dia sobre um tecido ou \u00f3rg\u00e3o e baseia-se no tipo de radia\u00e7\u00e3o absorvida.\u00a0A dose ponderada resultante foi designada como a dose equivalente de \u00f3rg\u00e3o ou tecido:<\/span><\/p>\n<p><img src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/equivalent-dose-equation-definition.png\" \/><\/p>\n<figure id=\"attachment_25310\" class=\"wp-caption alignright\"><\/figure>\n<figure id=\"attachment_25310\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-25310\"><img src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Radiation-weighting-factors-current-ICRP.png\" \/><figcaption id=\"caption-attachment-25310\" class=\"wp-caption-text\"><span>Tabela de fatores de pondera\u00e7\u00e3o da radia\u00e7\u00e3o.\u00a0Fonte: ICRP Publ.\u00a0103: As recomenda\u00e7\u00f5es de 2007 da Comiss\u00e3o Internacional de Prote\u00e7\u00e3o Radiol\u00f3gica<\/span><\/figcaption><\/figure>\n<p><span>Uma dose equivalente de\u00a0\u00a0<\/span><strong><span>um Sievert<\/span><\/strong><span>\u00a0\u00a0representa a quantidade de dose de radia\u00e7\u00e3o equivalente, em termos de\u00a0<\/span><strong><span>dano biol\u00f3gico<\/span><\/strong><span>\u00a0especificado\u00a0\u00a0, a\u00a0\u00a0<\/span><a href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-gray-unidade-de-dose-de-radiacao-definicao\/\"><strong><span>um cinza<\/span><\/strong><\/a><span>\u00a0\u00a0de\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/x-rays-roentgen-radiation\/\"><span>raios X<\/span><\/a><span>\u00a0\u00a0ou\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\"><span>raios gama<\/span><\/a><span>\u00a0.\u00a0Uma dose de\u00a0\u00a0<\/span><strong><span>um Sv<\/span><\/strong><span>\u00a0causada pela radia\u00e7\u00e3o gama \u00e9 equivalente a uma deposi\u00e7\u00e3o de energia de um joule em um quilograma de tecido.\u00a0Isso significa que um sievert \u00e9 equivalente a um cinza de raios gama depositados em certos tecidos.\u00a0Por outro lado, danos biol\u00f3gica semelhante (uma Sievert) pode ser causado apenas por 1\/20 cinza de alfa radia\u00e7\u00e3o (devido \u00e0 alta W\u00a0<\/span><sub><span>R<\/span><\/sub><span>\u00a0\u00a0de alfa radia\u00e7\u00e3o).\u00a0Portanto, o\u00a0\u00a0<\/span><strong><span>sievert n\u00e3o \u00e9 uma unidade de dose f\u00edsica<\/span><\/strong><span>.\u00a0Por exemplo, uma dose absorvida de 1 Gy por part\u00edculas alfa levar\u00e1 a uma dose equivalente a 20 Sv.\u00a0Isso pode parecer um paradoxo.\u00a0Isso implica que a energia do campo de radia\u00e7\u00e3o incidente em joules aumentou em um fator de 20, violando as leis de\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/laws-of-conservation\/law-of-conservation-of-energy\/\"><span>conserva\u00e7\u00e3o de energia<\/span><\/a><span>\u00a0.\u00a0No entanto, este n\u00e3o \u00e9 o caso.\u00a0Sievert \u00e9 derivado da dose f\u00edsica absorvida em quantidade, mas tamb\u00e9m leva em considera\u00e7\u00e3o a\u00a0\u00a0<\/span><strong><span>efic\u00e1cia biol\u00f3gica<\/span><\/strong><span>\u00a0\u00a0da radia\u00e7\u00e3o, que depende do tipo e energia da radia\u00e7\u00e3o.\u00a0O\u00a0\u00a0<\/span><strong><span>fator de pondera\u00e7\u00e3o da radia\u00e7\u00e3o\u00a0<\/span><\/strong><span>\u00a0faz com que o crivo n\u00e3o possa ser uma unidade f\u00edsica.<\/span><\/p>\n<\/div>\n<\/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","protected":false},"excerpt":{"rendered":"<p>Para exposi\u00e7\u00e3o externa, n\u00e3o podemos usar alguns dos princ\u00edpios de prote\u00e7\u00e3o contra radia\u00e7\u00e3o (tempo, dist\u00e2ncia, blindagem).\u00a0Contamina\u00e7\u00e3o externa significa que material radioativo foi depositado em superf\u00edcies (como roupas, sapatos).\u00a0Dosimetria de Radia\u00e7\u00e3o Capta\u00e7\u00e3o de Dose Externa Exposi\u00e7\u00e3o externa\u00a0\u00e9 radia\u00e7\u00e3o que vem de fora do nosso corpo e interage conosco.\u00a0Nesse caso, analisamos predominantemente a exposi\u00e7\u00e3o a raios gama, &#8230; <a title=\"O que \u00e9 Exposi\u00e7\u00e3o Externa &#8211; Contamina\u00e7\u00e3o Externa &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-exposicao-externa-contaminacao-externa-definicao\/\" aria-label=\"More on O que \u00e9 Exposi\u00e7\u00e3o Externa &#8211; Contamina\u00e7\u00e3o Externa &#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 Exposi\u00e7\u00e3o Externa - Contamina\u00e7\u00e3o Externa - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Para exposi\u00e7\u00e3o externa, n\u00e3o podemos usar alguns dos princ\u00edpios de prote\u00e7\u00e3o contra radia\u00e7\u00e3o (tempo, dist\u00e2ncia, blindagem). Contamina\u00e7\u00e3o externa significa que material radioativo foi depositado em superf\u00edcies (como roupas, sapatos). 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-exposicao-externa-contaminacao-externa-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 Exposi\u00e7\u00e3o Externa - Contamina\u00e7\u00e3o Externa - Defini\u00e7\u00e3o\" \/>\n<meta property=\"og:description\" content=\"Para exposi\u00e7\u00e3o externa, n\u00e3o podemos usar alguns dos princ\u00edpios de prote\u00e7\u00e3o contra radia\u00e7\u00e3o (tempo, dist\u00e2ncia, blindagem). 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