{"id":17412,"date":"2020-06-13T04:59:58","date_gmt":"2020-06-13T04:59:58","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-o-principio-de-operacao-dos-detectores-mosfet-definicao\/"},"modified":"2020-07-20T11:12:43","modified_gmt":"2020-07-20T11:12:43","slug":"o-que-e-o-principio-de-operacao-dos-detectores-mosfet-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-principio-de-operacao-dos-detectores-mosfet-definicao\/","title":{"rendered":"O que \u00e9 o princ\u00edpio de opera\u00e7\u00e3o dos detectores MOSFET &#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\">Princ\u00edpio de opera\u00e7\u00e3o dos detectores MOSFET.\u00a0A opera\u00e7\u00e3o dos detectores MOSFET \u00e9 resumida nos seguintes pontos: A radia\u00e7\u00e3o ionizante entra no volume sens\u00edvel do detector e interage com o material semicondutor.\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>O dos\u00edmetro MOSFET<\/strong>\u00a0\u00e9 um pequeno dispositivo port\u00e1til para monitoramento e leitura direta da taxa de dose de radia\u00e7\u00e3o.\u00a0Como \u00e9 baseado no\u00a0<strong>transistor MOSFET<\/strong>\u00a0, o\u00a0<strong>transistor de efeito de campo semicondutor de \u00f3xido de metal<\/strong>\u00a0(MOSFET), o princ\u00edpio de opera\u00e7\u00e3o \u00e9 semelhante ao dos\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-detection\/semiconductor-detectors\/\">detectores de semicondutores<\/a>\u00a0.\u00a0Os dos\u00edmetros MOSFET agora s\u00e3o usados \u200b\u200bcomo dos\u00edmetros cl\u00ednicos para feixes de radia\u00e7\u00e3o de radioterapia.\u00a0Sua principal vantagem \u00e9 o tamanho f\u00edsico, inferior a 4 mm\u00a0<sup>2<\/sup>\u00a0.\u00a0Na dosimetria de radioterapia, os dos\u00edmetros MOSFET geralmente substituem os dos\u00edmetros TLD, pois oferecem leitura imediata.<\/p>\n<h2>Princ\u00edpio de opera\u00e7\u00e3o dos detectores MOSFET\u00a0<strong>\u00a0<\/strong><\/h2>\n<p>A opera\u00e7\u00e3o dos detectores MOSFET \u00e9 resumida nos seguintes pontos:<\/p>\n<ul>\n<li><strong>A radia\u00e7\u00e3o ionizante entra<\/strong>\u00a0no volume sens\u00edvel do detector e interage com o material semicondutor.<\/li>\n<li>As part\u00edculas que passam pelo detector ionizam os \u00e1tomos do semicondutor, produzindo os\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-detection\/semiconductor-detectors\/what-are-semiconductors-properties-of-semiconductors\/electron-hole-pair\/\"><strong>pares el\u00e9tron-buraco<\/strong><\/a>\u00a0.\u00a0Pares de el\u00e9tron-buraco s\u00e3o gerados dentro do di\u00f3xido de sil\u00edcio pela radia\u00e7\u00e3o incidente.\u00a0Os el\u00e9trons, cuja mobilidade no SiO\u00a0<sub>2<\/sub>\u00a0\u00e0 temperatura ambiente \u00e9 cerca de 4 ordens de magnitude maior que os buracos, saem rapidamente do eletrodo da porta, enquanto os buracos se movem de maneira estoc\u00e1stica em dire\u00e7\u00e3o \u00e0\u00a0interface\u00a0Si \/ SiO\u00a0<sub>2<\/sub>\u00a0, onde ficam presos em locais de longo prazo, causando um desvio de tens\u00e3o limiar negativo (\u2206V\u00a0<sub>TH<\/sub>\u00a0), que pode persistir por anos.<\/li>\n<li>A diferen\u00e7a na mudan\u00e7a de tens\u00e3o antes e depois da exposi\u00e7\u00e3o pode ser medida e \u00e9 proporcional \u00e0 dose.<\/li>\n<\/ul>\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\"><\/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","protected":false},"excerpt":{"rendered":"<p>Princ\u00edpio de opera\u00e7\u00e3o dos detectores MOSFET.\u00a0A opera\u00e7\u00e3o dos detectores MOSFET \u00e9 resumida nos seguintes pontos: A radia\u00e7\u00e3o ionizante entra no volume sens\u00edvel do detector e interage com o material semicondutor.\u00a0Dosimetria de Radia\u00e7\u00e3o O dos\u00edmetro MOSFET\u00a0\u00e9 um pequeno dispositivo port\u00e1til para monitoramento e leitura direta da taxa de dose de radia\u00e7\u00e3o.\u00a0Como \u00e9 baseado no\u00a0transistor MOSFET\u00a0, o\u00a0transistor &#8230; <a title=\"O que \u00e9 o princ\u00edpio de opera\u00e7\u00e3o dos detectores MOSFET &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-o-principio-de-operacao-dos-detectores-mosfet-definicao\/\" aria-label=\"More on O que \u00e9 o princ\u00edpio de opera\u00e7\u00e3o dos detectores MOSFET &#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 o princ\u00edpio de opera\u00e7\u00e3o dos detectores MOSFET - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Princ\u00edpio de opera\u00e7\u00e3o dos detectores MOSFET. 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