{"id":18037,"date":"2020-06-25T04:58:27","date_gmt":"2020-06-25T04:58:27","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-rad-dose-absorvida-por-radiacao-definicao\/"},"modified":"2020-07-23T10:03:12","modified_gmt":"2020-07-23T10:03:12","slug":"o-que-e-rad-dose-absorvida-por-radiacao-definicao","status":"publish","type":"post","link":"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-rad-dose-absorvida-por-radiacao-definicao\/","title":{"rendered":"O que \u00e9 RAD &#8211; Dose absorvida por radia\u00e7\u00e3o &#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 rad (uma abrevia\u00e7\u00e3o de Dose absorvida por radia\u00e7\u00e3o) \u00e9 a unidade n\u00e3o SI da dose absorvida.\u00a0Uma dose de um rad \u00e9 equivalente \u00e0 deposi\u00e7\u00e3o de cem ergs de energia em um grama de qualquer material.\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>Dose absorvida<\/strong>\u00a0\u00e9 definida como a quantidade de energia depositada pela radia\u00e7\u00e3o ionizante em uma subst\u00e2ncia.\u00a0<strong>Dose absorvida<\/strong>\u00a0\u00e9 dado o s\u00edmbolo\u00a0<strong>D<\/strong>\u00a0.\u00a0O\u00a0<strong>rad<\/strong>\u00a0(uma abrevia\u00e7\u00e3o de\u00a0<strong>R<\/strong>\u00a0adiation\u00a0<strong>A<\/strong>\u00a0bsorbed\u00a0<strong>D<\/strong>\u00a0ose) \u00e9 a\u00a0<strong>unidade n\u00e3o SI<\/strong>\u00a0da dose absorvida.\u00a0A dose absorvida tamb\u00e9m \u00e9 medida em uma unidade chamada cinza (Gy), que \u00e9 derivada do sistema SI.\u00a0O\u00a0<strong>rad<\/strong>\u00a0n\u00e3o-SI unit\u00a0\u00e9 usado predominantemente nos EUA.<\/p>\n<p><a href=\"http:\/\/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=\"http:\/\/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=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-definition.png\" \/><\/a><\/p>\n<p>Unidades de dose absorvida:<\/p>\n<ul>\n<li>Cinzento.\u00a0Uma dose de um cinza \u00e9 equivalente a uma unidade de energia (joule) depositada em um quilograma de uma subst\u00e2ncia.<\/li>\n<li>RAD.\u00a0Uma dose de um rad \u00e9 equivalente \u00e0 deposi\u00e7\u00e3o de cem ergs de energia em um grama de qualquer material.<\/li>\n<\/ul>\n<h2>RAD &#8211; Unidade de Dose Absorvida<\/h2>\n<p>Uma dose de\u00a0<strong>um rad<\/strong>\u00a0\u00e9 equivalente \u00e0 deposi\u00e7\u00e3o de\u00a0<strong>cem ergs<\/strong>\u00a0de energia em\u00a0<strong>um grama<\/strong>\u00a0de qualquer material.\u00a0Observe que o erg \u00e9 uma unidade de energia e trabalha igual a 10 a\u00a0<sup>7<\/sup>\u00a0joules.\u00a0Uma unidade relacionada, o roentgen, \u00e9 usada para quantificar a exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o.\u00a0O fator F pode ser usado para converter entre rads e roentgens.<\/p>\n<p>Um rad \u00e9 uma dose significativamente menor do que um cinza, que \u00e9 uma grande quantidade de dose absorvida.\u00a0Uma pessoa que absorveu uma dose de 100 rad do corpo inteiro absorveu um joule de energia em cada kg de tecido corporal (isto \u00e9, 1 Gy).\u00a0As doses absorvidas medidas na ind\u00fastria (exceto medicina nuclear) geralmente t\u00eam doses compar\u00e1veis \u200b\u200ba um rad e os seguintes m\u00faltiplos s\u00e3o frequentemente usados:<\/p>\n<p><strong>1 mrad (milirad) = 1E-3 rad<\/strong><\/p>\n<p><strong>1 krad (kilorad) = 1E3 rad<\/strong><\/p>\n<p>As convers\u00f5es das unidades SI para outras unidades s\u00e3o as seguintes:<\/p>\n<ul>\n<li>1 Gy = 100 rad<\/li>\n<li>1 mGy = 100 mrad<\/li>\n<\/ul>\n<p>O cinza e o rad s\u00e3o unidades f\u00edsicas.\u00a0Eles descrevem o efeito f\u00edsico da radia\u00e7\u00e3o incidente (ou seja, a quantidade de energia depositada por kg), mas n\u00e3o nos diz nada sobre as consequ\u00eancias biol\u00f3gicas dessa deposi\u00e7\u00e3o de energia no tecido vivo.<\/p>\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><span>Exemplos de doses absorvidas em rads<\/span><\/h2>\n<p><span>Devemos notar que a radia\u00e7\u00e3o est\u00e1 \u00e0 nossa volta.\u00a0Dentro, ao redor e acima do mundo em que vivemos. \u00c9 uma for\u00e7a de energia natural que nos rodeia.\u00a0\u00c9 uma parte do nosso mundo natural que est\u00e1 aqui desde o nascimento do nosso planeta.\u00a0Nos pontos seguintes, tentamos expressar enormes faixas de exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o, que podem ser obtidas de v\u00e1rias fontes.<\/span><\/p>\n<ul>\n<li><strong><span>0,005 mrad<\/span><\/strong><span>\u00a0&#8211; Dormindo ao lado de algu\u00e9m<\/span><\/li>\n<li><strong><span>0,009 mrad<\/span><\/strong><span>\u00a0&#8211; Morando at\u00e9 48 quil\u00f4metros de uma usina nuclear por um ano<\/span><\/li>\n<li><strong><span>0,01 mrad<\/span><\/strong><span>\u00a0&#8211; Comendo uma banana<\/span><\/li>\n<li><strong><span>0,03 mrad<\/span><\/strong><span>\u00a0&#8211; Morando a 80 quil\u00f4metros de uma usina a carv\u00e3o por um ano<\/span><\/li>\n<li><strong><span>1 mrad<\/span><\/strong><span>\u00a0&#8211; Dose di\u00e1ria m\u00e9dia recebida do fundo natural<\/span><\/li>\n<li><strong><span>2 mrad<\/span><\/strong><span>\u00a0&#8211; radiografia de t\u00f3rax<\/span><\/li>\n<li><strong><span>4 mrad<\/span><\/strong><span>\u00a0&#8211; Um voo de avi\u00e3o de 5 horas<\/span><\/li>\n<li><strong><span>60 mrad<\/span><\/strong><span>\u00a0&#8211; mamografia<\/span><\/li>\n<li><strong><span>100 mrad<\/span><\/strong><span>\u00a0&#8211; Limite de dose para membros individuais do p\u00fablico, dose efetiva total por ano<\/span><\/li>\n<li><strong><span>365 mrad<\/span><\/strong><span>\u00a0&#8211; Dose m\u00e9dia anual recebida do fundo natural<\/span><\/li>\n<li><strong><span>580 mrad<\/span><\/strong><span>\u00a0&#8211; tomografia computadorizada do t\u00f3rax<\/span><\/li>\n<li><strong><span>1 000 mrad<\/span><\/strong><span>\u00a0&#8211; Dose m\u00e9dia anual recebida da natureza em Ramsar, Ir\u00e3<\/span><\/li>\n<li><strong><span>2.000 mrad<\/span><\/strong><span>\u00a0&#8211; tomografia computadorizada de corpo inteiro<\/span><\/li>\n<li><strong><span>17 500 mrad<\/span><\/strong><span>\u00a0&#8211; Dose anual de radia\u00e7\u00e3o natural em uma praia de monazita perto de Guarapari, Brasil.<\/span><\/li>\n<li><strong><span>500 000 mrad<\/span><\/strong><span>\u00a0&#8211; Dose necess\u00e1ria para matar um ser humano com um risco de 50% dentro de 30 dias (LD50 \/ 30), se a dose for recebida por um per\u00edodo\u00a0<\/span><strong><span>muito curto<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<\/ul>\n<p><span>Como pode ser visto, doses baixas s\u00e3o comuns na vida cotidiana.\u00a0Os exemplos anteriores podem ajudar a ilustrar magnitudes relativas.\u00a0Do ponto de vista das consequ\u00eancias biol\u00f3gicas, \u00e9 muito importante distinguir entre doses recebidas em\u00a0<strong>per\u00edodos\u00a0<\/strong><\/span><strong><span>curtos<\/span><\/strong><span>\u00a0e\u00a0<\/span><strong><span>prolongados<\/span><\/strong><span>\u00a0.\u00a0Uma \u201c\u00a0<\/span><strong><span>dose aguda<\/span><\/strong><span>\u00a0\u201d \u00e9 aquela que ocorre por um per\u00edodo curto e finito de tempo, enquanto uma \u201c\u00a0<strong>dose cr\u00f4nica<\/strong>\u00a0\u201d<\/span><span>\u201d\u00c9 uma dose que continua por um longo per\u00edodo de tempo, para que seja melhor descrita por uma taxa de dose.\u00a0Altas doses tendem a matar c\u00e9lulas, enquanto doses baixas tendem a danific\u00e1-las ou alter\u00e1-las.\u00a0Doses baixas espalhadas por longos per\u00edodos de tempo n\u00e3o causam problemas imediatos a nenhum \u00f3rg\u00e3o do corpo.\u00a0Os efeitos de baixas doses de radia\u00e7\u00e3o ocorrem no n\u00edvel da c\u00e9lula e os resultados podem n\u00e3o ser observados por muitos anos.<\/span><\/p>\n<h2><span>C\u00e1lculo da taxa de dose protegida em rads<\/span><\/h2>\n<p><span>Suponha a\u00a0<\/span><strong><span>fonte isotr\u00f3pica pontual<\/span><\/strong><span>\u00a0que cont\u00e9m\u00a0<\/span><strong><span>1,0 Ci de\u00a0<\/span><sup><span>137<\/span><\/sup><span>\u00a0Cs<\/span><\/strong><span>\u00a0, que tem uma\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radioactive-decay-law\/half-life\/\"><span>meia-vida<\/span><\/a><span>\u00a0de\u00a0<\/span><strong><span>30,2 anos<\/span><\/strong><span>\u00a0.\u00a0Observe que a rela\u00e7\u00e3o entre a meia-vida e a quantidade de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/atom-properties-of-atoms\/radionuclide-radioisotope\/\"><span>radionucl\u00eddeo<\/span><\/a><span>\u00a0necess\u00e1ria para gerar uma atividade de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/units-of-radioactivity\/curie-unit-of-radioactivity\/\"><span>um curie<\/span><\/a><span>\u00a0\u00e9 mostrada abaixo.\u00a0Essa quantidade de material pode ser calculada usando \u03bb, que \u00e9 a\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radioactive-decay-law\/decay-constant\/\"><span>constante<\/span><\/a><span>\u00a0de\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radioactive-decay-law\/decay-constant\/\">decaimento<\/a>\u00a0de determinado nucl\u00eddeo:<\/span><\/p>\n<p><a href=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Curie-Unit-of-Activity.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-24886 lazy-loaded\" src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Curie-Unit-of-Activity.png\" alt=\"Curie - Unidade de Atividade\" width=\"378\" height=\"61\" data-lazy-type=\"image\" data-src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Curie-Unit-of-Activity.png\" \/><\/a><\/p>\n<p><span>Cerca de 94,6% decai por\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/beta-decay-beta-radioactivity\/\"><span>emiss\u00e3o beta<\/span><\/a><span>\u00a0em um\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/atom-properties-of-atoms\/nuclides\/isomers\/\"><span>is\u00f4mero nuclear<\/span><\/a><span>\u00a0metaest\u00e1vel\u00a0de b\u00e1rio: b\u00e1rio-137m.\u00a0O pico principal de f\u00f3tons de Ba-137m \u00e9\u00a0<\/span><strong><span>662 keV<\/span><\/strong><span>\u00a0.\u00a0Para esse c\u00e1lculo, suponha que todos os decaimentos passem por esse canal.<\/span><\/p>\n<p><strong><span>Calcule a taxa de dose prim\u00e1ria de f\u00f3ton<\/span><\/strong><span>\u00a0, em rads por hora (rad.h\u00a0<\/span><sup><span>-1<\/span><\/sup><span>\u00a0), na superf\u00edcie externa de uma blindagem de chumbo com 5 cm de espessura.\u00a0A taxa de dose prim\u00e1ria de f\u00f3tons negligencia todas as part\u00edculas secund\u00e1rias.\u00a0Suponha que a dist\u00e2ncia efetiva da fonte do ponto de dose seja\u00a0<\/span><strong><span>10 cm<\/span><\/strong><span>\u00a0.\u00a0Tamb\u00e9m devemos assumir que o ponto de dose \u00e9 um tecido mole, que pode ser razoavelmente simulado pela \u00e1gua e usamos o coeficiente de absor\u00e7\u00e3o de energia em massa da \u00e1gua.<\/span><\/p>\n<p><span>Veja tamb\u00e9m:\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-gamma-radiation-matter\/gamma-ray-attenuation\/\"><span>Atenua\u00e7\u00e3o de raios gama<\/span><\/a><\/p>\n<p><span>Veja tamb\u00e9m:\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/shielding-of-ionizing-radiation\/shielding-gamma-radiation\/\"><span>Blindagem de raios gama<\/span><\/a><\/p>\n<p><strong><span>Solu\u00e7\u00e3o:<\/span><\/strong><\/p>\n<p><span>A taxa de dose prim\u00e1ria de f\u00f3tons \u00e9\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-gamma-radiation-matter\/gamma-ray-attenuation\/\"><span>atenuada exponencialmente<\/span><\/a><span>\u00a0, e a taxa de dose de f\u00f3tons prim\u00e1rios, levando em considera\u00e7\u00e3o o escudo, \u00e9 dada por:<\/span><\/p>\n<p><a href=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/dose-rate-calculation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-25304 lazy-loaded\" src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/dose-rate-calculation.png\" alt=\"c\u00e1lculo da taxa de dose\" width=\"671\" height=\"307\" data-lazy-type=\"image\" data-src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/dose-rate-calculation.png\" \/><\/a><\/p>\n<p><span>Como pode ser visto, n\u00e3o consideramos o ac\u00famulo de radia\u00e7\u00e3o secund\u00e1ria.\u00a0Se part\u00edculas secund\u00e1rias forem produzidas ou se a radia\u00e7\u00e3o prim\u00e1ria mudar sua energia ou dire\u00e7\u00e3o, a atenua\u00e7\u00e3o efetiva ser\u00e1 muito menor.\u00a0Essa suposi\u00e7\u00e3o geralmente subestima a taxa de dose verdadeira, especialmente para blindagens espessas e quando o ponto de dose est\u00e1 pr\u00f3ximo \u00e0 superf\u00edcie da blindagem, mas essa suposi\u00e7\u00e3o simplifica todos os c\u00e1lculos.\u00a0Nesse caso, a taxa real de dose (com o ac\u00famulo de radia\u00e7\u00e3o secund\u00e1ria) ser\u00e1 mais de duas vezes maior.<\/span><\/p>\n<p><span>Para calcular a\u00a0<\/span><strong><span>taxa de dose absorvida<\/span><\/strong><span>\u00a0, precisamos usar a f\u00f3rmula:<\/span><\/p>\n<ul>\n<li><span>k = 5,76 x 10\u00a0<\/span><sup><span>-7<\/span><\/sup><\/li>\n<li><span>S = 3,7 x 10\u00a0<\/span><sup><span>10<\/span><\/sup><span>\u00a0s\u00a0<\/span><sup><span>-1<\/span><\/sup><\/li>\n<li><span>E = 0,662 MeV<\/span><\/li>\n<li><span>\u03bc\u00a0<\/span><sub><span>t<\/span><\/sub><span>\u00a0\/ \u03c1 = 0,0326 cm\u00a0<\/span><sup><span>2<\/span><\/sup><span>\u00a0\/ g (os valores est\u00e3o dispon\u00edveis no NIST)<\/span><\/li>\n<li><span>\u03bc = 1,289 cm\u00a0<\/span><sup><span>-1<\/span><\/sup><span>\u00a0(os valores est\u00e3o dispon\u00edveis no NIST)<\/span><\/li>\n<li><span>D = 5 cm<\/span><\/li>\n<li><span>r = 10 cm<\/span><\/li>\n<\/ul>\n<p><strong><span>Resultado:<\/span><\/strong><\/p>\n<p><span>A taxa de dose absorvida resultante em cinza por hora \u00e9 ent\u00e3o:<\/span><\/p>\n<p><a href=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-rate-rad-calculation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-25305 lazy-loaded\" src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-rate-rad-calculation.png\" alt=\"taxa de dose absorvida - rad - c\u00e1lculo\" width=\"563\" height=\"166\" data-lazy-type=\"image\" data-src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-rate-rad-calculation.png\" \/><\/a><\/p>\n<p><span>Se queremos dar conta do ac\u00famulo de radia\u00e7\u00e3o secund\u00e1ria, precisamos incluir o fator de ac\u00famulo.\u00a0A\u00a0<\/span><strong><span>f\u00f3rmula estendida<\/span><\/strong><span>\u00a0para a taxa de dose \u00e9 ent\u00e3o:<\/span><\/p>\n<p><a href=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-rate-gray-calculation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-25303 lazy-loaded\" src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-rate-gray-calculation.png\" alt=\"taxa de dose absorvida - cinza\" width=\"693\" height=\"158\" data-lazy-type=\"image\" data-src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/absorbed-dose-rate-gray-calculation.png\" \/><\/a><\/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<\/div>\n<\/div>\n<\/div>\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>O rad (uma abrevia\u00e7\u00e3o de Dose absorvida por radia\u00e7\u00e3o) \u00e9 a unidade n\u00e3o SI da dose absorvida.\u00a0Uma dose de um rad \u00e9 equivalente \u00e0 deposi\u00e7\u00e3o de cem ergs de energia em um grama de qualquer material.\u00a0Dosimetria de Radia\u00e7\u00e3o Dose absorvida\u00a0\u00e9 definida como a quantidade de energia depositada pela radia\u00e7\u00e3o ionizante em uma subst\u00e2ncia.\u00a0Dose absorvida\u00a0\u00e9 dado &#8230; <a title=\"O que \u00e9 RAD &#8211; Dose absorvida por radia\u00e7\u00e3o &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-rad-dose-absorvida-por-radiacao-definicao\/\" aria-label=\"More on O que \u00e9 RAD &#8211; Dose absorvida por radia\u00e7\u00e3o &#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 RAD - Dose absorvida por radia\u00e7\u00e3o - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"O rad (uma abrevia\u00e7\u00e3o de Dose absorvida por radia\u00e7\u00e3o) \u00e9 a unidade n\u00e3o SI da dose absorvida. Uma dose de um rad \u00e9 equivalente \u00e0 deposi\u00e7\u00e3o de cem ergs de energia em um grama de qualquer material. 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-rad-dose-absorvida-por-radiacao-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 RAD - Dose absorvida por radia\u00e7\u00e3o - Defini\u00e7\u00e3o\" \/>\n<meta property=\"og:description\" content=\"O rad (uma abrevia\u00e7\u00e3o de Dose absorvida por radia\u00e7\u00e3o) \u00e9 a unidade n\u00e3o SI da dose absorvida. Uma dose de um rad \u00e9 equivalente \u00e0 deposi\u00e7\u00e3o de cem ergs de energia em um grama de qualquer material. 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