{"id":18098,"date":"2020-06-26T22:31:27","date_gmt":"2020-06-26T22:31:27","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-conversao-interna-de-eletrons-ice-definicao\/"},"modified":"2020-07-24T06:18:29","modified_gmt":"2020-07-24T06:18:29","slug":"o-que-e-conversao-interna-de-eletrons-ice-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-conversao-interna-de-eletrons-ice-definicao\/","title":{"rendered":"O que \u00e9 convers\u00e3o interna de el\u00e9trons – ICE – Defini\u00e7\u00e3o"},"content":{"rendered":"
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Os el\u00e9trons de convers\u00e3o interna, ICE, s\u00e3o el\u00e9trons de alta energia resultantes do processo de convers\u00e3o interna.\u00a0Esses el\u00e9trons s\u00e3o orbitais at\u00f4micos.\u00a0Dosimetria de Radia\u00e7\u00e3o<\/div>\n<\/div>\n
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\"Convers\u00e3o<\/a>
Convers\u00e3o interna seguida por emiss\u00e3o de el\u00e9trons Auger.<\/figcaption><\/figure>\n

A convers\u00e3o interna<\/strong>\u00a0\u00e9 um processo eletromagn\u00e9tico, pelo qual um estado nuclear excitado decai pela\u00a0emiss\u00e3o direta<\/strong>\u00a0de um de seus\u00a0el\u00e9trons at\u00f4micos<\/strong>\u00a0.\u00a0Observe que os\u00a0el\u00e9trons de alta energia<\/strong>\u00a0resultantes da convers\u00e3o interna n\u00e3o s\u00e3o chamados de part\u00edculas beta, uma vez que estes \u00faltimos prov\u00eam do decaimento beta, onde s\u00e3o criados recentemente no processo de decaimento nuclear.\u00a0Esses el\u00e9trons s\u00e3o conhecidos como\u00a0el\u00e9trons de convers\u00e3o interna<\/strong>\u00a0.<\/p>\n

A\u00a0energia\u00a0interna do el\u00e9tron de convers\u00e3o<\/strong>\u00a0(ICE) \u00e9 a energia de\u00a0transi\u00e7\u00e3o<\/sub>\u00a0,\u00a0transi\u00e7\u00e3o<\/sub>\u00a0E\u00a0, menos a energia de liga\u00e7\u00e3o do el\u00e9tron orbital, E\u00a0b.e.\u00a0<\/sub>, Como:<\/p>\n

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Por exemplo,\u00a0203<\/sup>\u00a0Hg \u00e9 um nucl\u00eddeo beta radioativo, que produz um espectro beta cont\u00ednuo com energia m\u00e1xima de 214 keV.\u00a0Esse decaimento produz um estado excitado do n\u00facleo filha\u00a0203<\/sup>\u00a0Tl, que decai muito rapidamente (~\u00a010-10<\/sup>\u00a0s) para o seu estado fundamental, emitindo um\u00a0raio gama<\/strong>\u00a0de energia 279,2 keV\u00a0ou<\/strong>\u00a0um\u00a0el\u00e9tron de convers\u00e3o interno<\/strong>\u00a0.\u00a0Se analisarmos um espectro de part\u00edculas beta, podemos ver o espectro cont\u00ednuo t\u00edpico de part\u00edculas beta, bem como\u00a0picos estreitos em energias espec\u00edficas<\/strong>\u00a0.\u00a0Esses picos s\u00e3o produzidos por\u00a0el\u00e9trons de convers\u00e3o interna<\/strong>\u00a0(ICE).\u00a0Desde a\u00a0energia<\/a>\u00a0de\u00a0liga\u00e7\u00e3o<\/a>\u00a0dos el\u00e9trons K em\u00a0203<\/sup>Tl atinge 85,5 keV, a linha K tem uma energia de:<\/p>\n

T\u00a0e<\/sub>\u00a0(K) = 279,2 – 85,5 = 194 keV<\/p>\n

Devido \u00e0s energias de liga\u00e7\u00e3o menores, as linhas L e M t\u00eam energias mais altas.\u00a0Como o processo de convers\u00e3o interna pode interagir com qualquer um dos el\u00e9trons orbitais, o resultado \u00e9 um espectro de el\u00e9trons de convers\u00e3o interna que ser\u00e1 visto como sobreposto ao espectro de energia eletr\u00f4nica da emiss\u00e3o beta.\u00a0Essas intensidades relativas desses picos de ICE podem fornecer informa\u00e7\u00f5es sobre o car\u00e1ter multipolar el\u00e9trico do n\u00facleo e sobre o processo de decaimento.<\/p>\n

Refer\u00eancia especial: Kenneth S. Krane.\u00a0F\u00edsica Nuclear Introdut\u00f3ria, 3a Edi\u00e7\u00e3o, Wiley, 1987, ISBN 978-0471805533<\/p>\n

\"El\u00e9trons<\/a><\/p>\n<\/div>\n<\/div>\n

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……………………………………………………………………………………………………………………………….<\/p>\n

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":"

Os el\u00e9trons de convers\u00e3o interna, ICE, s\u00e3o el\u00e9trons de alta energia resultantes do processo de convers\u00e3o interna.\u00a0Esses el\u00e9trons s\u00e3o orbitais at\u00f4micos.\u00a0Dosimetria de Radia\u00e7\u00e3o Convers\u00e3o interna seguida por emiss\u00e3o de el\u00e9trons Auger. A convers\u00e3o interna\u00a0\u00e9 um processo eletromagn\u00e9tico, pelo qual um estado nuclear excitado decai pela\u00a0emiss\u00e3o direta\u00a0de um de seus\u00a0el\u00e9trons at\u00f4micos\u00a0.\u00a0Observe que os\u00a0el\u00e9trons de alta energia\u00a0resultantes … 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 convers\u00e3o interna de el\u00e9trons - ICE - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Os el\u00e9trons de convers\u00e3o interna, ICE, s\u00e3o el\u00e9trons de alta energia resultantes do processo de convers\u00e3o interna. Esses el\u00e9trons s\u00e3o orbitais at\u00f4micos. 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