{"id":17561,"date":"2020-06-15T14:33:13","date_gmt":"2020-06-15T14:33:13","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-a-deteccao-de-radiacao-beta-detector-de-particulas-beta-definicao\/"},"modified":"2020-07-21T11:39:45","modified_gmt":"2020-07-21T11:39:45","slug":"o-que-e-a-deteccao-de-radiacao-beta-detector-de-particulas-beta-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-a-deteccao-de-radiacao-beta-detector-de-particulas-beta-definicao\/","title":{"rendered":"O que \u00e9 a detec\u00e7\u00e3o de radia\u00e7\u00e3o beta &#8211; Detector de part\u00edculas beta &#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\">A detec\u00e7\u00e3o da radia\u00e7\u00e3o beta \u00e9 muito espec\u00edfica, porque as part\u00edculas beta s\u00e3o mais penetrantes que as part\u00edculas alfa.\u00a0Por outro lado, uma fina placa de alum\u00ednio pode det\u00ea-los.\u00a0Detec\u00e7\u00e3o de radia\u00e7\u00e3o beta &#8211; Detector de part\u00edculas beta<\/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<figure id=\"attachment_26651\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-26651\"><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Geiger-counter-Beta-radiation.jpg\"><img loading=\"lazy\" class=\"size-medium wp-image-26651 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Geiger-counter-Beta-radiation-300x233.jpg\" alt=\"Contador Geiger - radia\u00e7\u00e3o beta\" width=\"300\" height=\"233\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Geiger-counter-Beta-radiation-300x233.jpg\" \/><\/a><figcaption id=\"caption-attachment-26651\" class=\"wp-caption-text\">Uso laboratorial de um contador Geiger com sonda na janela final para medir radia\u00e7\u00e3o beta Fonte: wikipedia.org Licen\u00e7a: Public Domain<\/figcaption><\/figure>\n<p><strong>A detec\u00e7\u00e3o da radia\u00e7\u00e3o beta<\/strong>\u00a0\u00e9 muito espec\u00edfica, porque as\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/\">part\u00edculas beta<\/a>\u00a0s\u00e3o mais penetrantes que as part\u00edculas alfa.\u00a0Por outro lado, uma fina placa de alum\u00ednio pode det\u00ea-los.<\/p>\n<p>Para descrever os princ\u00edpios de detec\u00e7\u00e3o da radia\u00e7\u00e3o beta, precisamos entender a\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-beta-radiation\/\">intera\u00e7\u00e3o da radia\u00e7\u00e3o com a mat\u00e9ria<\/a>\u00a0.\u00a0Cada tipo de part\u00edcula interage de uma maneira diferente; portanto, devemos descrever a intera\u00e7\u00e3o das part\u00edculas beta (radia\u00e7\u00e3o como um fluxo dessas part\u00edculas) separadamente.<\/p>\n<h2>Intera\u00e7\u00e3o de part\u00edculas beta com mat\u00e9ria<\/h2>\n<p>A radia\u00e7\u00e3o beta consiste em\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/what-is-electron-properties-of-electron\/\">el\u00e9trons<\/a>\u00a0livres\u00a0ou\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/what-is-electron-properties-of-electron\/what-is-positron-properties\/\">p\u00f3sitrons<\/a>\u00a0em velocidades relativ\u00edsticas.\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/\">As part\u00edculas beta<\/a>\u00a0(el\u00e9trons) s\u00e3o muito menores que as part\u00edculas alfa.\u00a0Eles carregam uma \u00fanica carga negativa.\u00a0Eles s\u00e3o mais penetrantes que as part\u00edculas alfa, mas uma fina placa de alum\u00ednio pode det\u00ea-las.\u00a0Eles podem viajar v\u00e1rios metros no ar, mas depositam menos energia em qualquer ponto do caminho do que as part\u00edculas alfa.\u00a0Da mesma forma que para part\u00edculas carregadas pesadas, as part\u00edculas beta transferem energia por:<\/p>\n<ul>\n<li><strong>Excita\u00e7\u00e3o.\u00a0<\/strong>A part\u00edcula carregada pode transferir energia para o \u00e1tomo, elevando os el\u00e9trons para n\u00edveis mais altos de energia.<\/li>\n<li><strong>Ionizacao.\u00a0<\/strong>A ioniza\u00e7\u00e3o pode ocorrer quando a part\u00edcula carregada possui energia suficiente para remover um el\u00e9tron.\u00a0Isso resulta na cria\u00e7\u00e3o de pares de \u00edons na mat\u00e9ria circundante.<\/li>\n<\/ul>\n<p>Al\u00e9m dessas intera\u00e7\u00f5es, as part\u00edculas beta tamb\u00e9m perdem energia pelo processo radiativo conhecido como\u00a0<strong>bremsstrahlung<\/strong>\u00a0.\u00a0Da teoria cl\u00e1ssica, quando uma part\u00edcula carregada \u00e9 acelerada ou desacelerada,\u00a0<strong>ela deve irradiar energia<\/strong>\u00a0e a radia\u00e7\u00e3o de desacelera\u00e7\u00e3o \u00e9 conhecida como\u00a0<strong>bremsstrahlung (&#8220;radia\u00e7\u00e3o de frenagem&#8221;)<\/strong>\u00a0.<\/p>\n<p><strong><span>Resumo dos tipos de intera\u00e7\u00f5es:<\/span><\/strong><\/p>\n<ul>\n<li><strong><span>Colis\u00f5es inel\u00e1sticas com el\u00e9trons at\u00f4micos (excita\u00e7\u00e3o e ioniza\u00e7\u00e3o)<\/span><\/strong><\/li>\n<li><strong><span>Espalhamento el\u00e1stico dos n\u00facleos<\/span><\/strong><\/li>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/bremsstrahlung-2\/\"><strong><span>Bremsstrahlung<\/span><\/strong><\/a><\/li>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/cherenkov-radiation\/\"><strong><span>Radia\u00e7\u00e3o Cherenkov.<\/span><\/strong><\/a><\/li>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/positron-annihilation-2\/\"><strong><span>Aniquila\u00e7\u00e3o<\/span><\/strong><\/a><strong><span>\u00a0(apenas p\u00f3sitrons)<\/span><\/strong><\/li>\n<\/ul>\n<p><strong><span>A natureza de uma intera\u00e7\u00e3o de uma radia\u00e7\u00e3o beta<\/span><\/strong><span>\u00a0com a mat\u00e9ria \u00e9 diferente da\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\"><span>radia\u00e7\u00e3o alfa<\/span><\/a><span>\u00a0, apesar do fato de que as part\u00edculas beta tamb\u00e9m s\u00e3o part\u00edculas carregadas.\u00a0Em compara\u00e7\u00e3o com part\u00edculas alfa, as part\u00edculas beta t\u00eam\u00a0<\/span><strong><span>massa muito menor<\/span><\/strong><span>\u00a0e atingem\u00a0<\/span><strong><span>principalmente energias relativ\u00edsticas<\/span><\/strong><span>\u00a0.\u00a0Sua massa \u00e9 igual \u00e0 massa dos el\u00e9trons orbitais com os quais eles est\u00e3o interagindo e, diferentemente da part\u00edcula alfa, uma fra\u00e7\u00e3o muito maior de sua energia cin\u00e9tica pode ser perdida em uma \u00fanica intera\u00e7\u00e3o.\u00a0Como as part\u00edculas beta atingem principalmente as energias relativ\u00edsticas, a\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-heavy-charged-particles\/stopping-power-bethe-formula\/\"><span>f\u00f3rmula<\/span><\/a><span>\u00a0n\u00e3o-\u00a0relativ\u00edstica de\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-heavy-charged-particles\/stopping-power-bethe-formula\/\">Bethe<\/a>\u00a0n\u00e3o pode ser usada.\u00a0<\/span><strong><span>Para el\u00e9trons de alta energia,<\/span><\/strong><span>\u00a0uma express\u00e3o semelhante tamb\u00e9m foi derivada por\u00a0<\/span><strong><span>Bethe<\/span><\/strong><span>descrever a perda de energia espec\u00edfica devido \u00e0\u00a0<\/span><strong><span>excita\u00e7\u00e3o e ioniza\u00e7\u00e3o<\/span><\/strong><span>\u00a0(as &#8220;perdas colisionais&#8221;).<\/span><\/p>\n<p><span>Al\u00e9m disso, as part\u00edculas beta podem interagir via intera\u00e7\u00e3o\u00a0<\/span><strong><span>el\u00e9tron-nuclear<\/span><\/strong><span>\u00a0(dispers\u00e3o el\u00e1stica dos n\u00facleos), o que pode alterar significativamente a\u00a0<\/span><strong><span>dire\u00e7\u00e3o da part\u00edcula beta<\/span><\/strong><span>\u00a0.\u00a0Portanto, o caminho deles n\u00e3o \u00e9 t\u00e3o direto.\u00a0As part\u00edculas beta seguem um\u00a0<\/span><strong><span>caminho<\/span><\/strong><span>\u00a0muito em\u00a0<strong>zigue-zague<\/strong>\u00a0atrav\u00e9s do material absorvente; esse caminho resultante da part\u00edcula \u00e9 maior que a penetra\u00e7\u00e3o linear (faixa) no material.<\/span><\/p>\n<h2><span>Detectores de radia\u00e7\u00e3o beta<\/span><\/h2>\n<p><strong><span>Os detectores<\/span><\/strong><span>\u00a0tamb\u00e9m podem ser classificados de acordo com materiais e m\u00e9todos sens\u00edveis que podem ser utilizados para fazer uma medi\u00e7\u00e3o:<\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-detection\/gaseous-ionization-detector\/\"><strong><span>Detectores de ioniza\u00e7\u00e3o gasosa<\/span><\/strong><\/a><\/li>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-detection\/scintillation-counter-scintillation-detector\/\"><strong><span>Detectores de cintila\u00e7\u00e3o<\/span><\/strong><\/a><\/li>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-detection\/semiconductor-detectors\/\"><strong><span>Detectores de semicondutores<\/span><\/strong><\/a><\/li>\n<\/ul>\n<h3><span id=\"Detection_of_Beta_Radiation_using_Ionization_Chamber\"><span>Detec\u00e7\u00e3o de radia\u00e7\u00e3o beta usando c\u00e2mara de ioniza\u00e7\u00e3o<\/span><\/span><\/h3>\n<p><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/ionization-chamber-basic-principle.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-26132 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/ionization-chamber-basic-principle-202x300.png\" alt=\"c\u00e2mara de ioniza\u00e7\u00e3o - princ\u00edpio b\u00e1sico\" width=\"202\" height=\"300\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/ionization-chamber-basic-principle-202x300.png\" \/><\/a><span>Para que as\u00a0\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/\">part\u00edculas\u00a0<\/a><\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\"><span>alfa<\/span><\/a><span>\u00a0\u00a0e\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/\"><span>beta<\/span><\/a><span>\u00a0\u00a0sejam detectadas pelas c\u00e2maras de ioniza\u00e7\u00e3o, elas devem ter uma janela fina.\u00a0Essa &#8220;janela final&#8221; deve ser fina o suficiente para que as part\u00edculas alfa e beta penetrem.\u00a0No entanto, uma janela de quase qualquer espessura impedir\u00e1 que uma part\u00edcula alfa entre na c\u00e2mara.\u00a0A janela \u00e9 geralmente feita de mica com uma densidade de cerca de 1,5 &#8211; 2,0 mg \/ cm\u00a0<\/span><sup><span>2<\/span><\/sup><span>\u00a0.<\/span><\/p>\n<p><span>A c\u00e2mara de ioniza\u00e7\u00e3o pode ser, por exemplo, usada para a medi\u00e7\u00e3o de tr\u00edtio no ar.\u00a0Esses dispositivos s\u00e3o conhecidos como monitores de tr\u00edtio no ar.\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/glossary\/tritium\/\"><strong><span>O tr\u00edtio<\/span><\/strong><\/a><span>\u00a0\u00a0\u00e9 um is\u00f3topo radioativo, mas emite uma forma muito fraca de radia\u00e7\u00e3o, uma\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/beta-particle\/\"><span>part\u00edcula beta de<\/span><\/a><span>\u00a0baixa energia\u00a0\u00a0\u00a0que \u00e9 semelhante a um el\u00e9tron.\u00a0\u00c9 um emissor beta puro (ou seja, emissor beta sem uma\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 gama que o<\/span><\/a><span>\u00a0acompanha\u00a0\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<\/a>\u00a0quase indetect\u00e1vel do el\u00e9tron\u00a0<\/span><span>.\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.\u00a0\u00c9 praticamente imposs\u00edvel projetar um detector cujas paredes essas part\u00edculas beta possam penetrar.\u00a0Em vez disso, o monitor de tr\u00edtio no ar bombeia o ar contaminado com tr\u00edtio diretamente atrav\u00e9s de uma c\u00e2mara de ioniza\u00e7\u00e3o, de modo que toda a energia das part\u00edculas beta possa ser utilmente convertida na produ\u00e7\u00e3o de pares de \u00edons no interior da c\u00e2mara.<\/span><\/p>\n<h3><span>Detec\u00e7\u00e3o de radia\u00e7\u00e3o beta usando contador de cintila\u00e7\u00e3o<\/span><\/h3>\n<p><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-detection\/scintillation-counter-scintillation-detector\/\"><strong><span>Os contadores de cintila\u00e7\u00e3o<\/span><\/strong><\/a><span>\u00a0\u00a0s\u00e3o usados \u200b\u200bpara medir a radia\u00e7\u00e3o em uma variedade de aplica\u00e7\u00f5es, incluindo medidores port\u00e1teis de pesquisa de radia\u00e7\u00e3o, monitoramento pessoal e ambiental de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/protection-from-exposures\/radioactive-contamination\/\"><span>\u00a0contamina\u00e7\u00e3o radioativa<\/span><\/a><span>\u00a0, imagens m\u00e9dicas, ensaios radiom\u00e9tricos, seguran\u00e7a nuclear e seguran\u00e7a de usinas nucleares.\u00a0Eles s\u00e3o amplamente utilizados porque podem ser fabricados de maneira barata e com boa efici\u00eancia e podem medir a intensidade e a energia da radia\u00e7\u00e3o incidente.<\/span><\/p>\n<p><span>Os contadores de cintila\u00e7\u00e3o podem ser usados \u200b\u200bpara detectar\u00a0\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\">radia\u00e7\u00e3o\u00a0<\/a><\/span><a href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-radiacao-alfa-definicao\/\"><span>alfa<\/span><\/a><span>\u00a0,\u00a0\u00a0<\/span><a href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-radiacao-beta-definicao\/\"><span>beta<\/span><\/a><span>\u00a0e\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\"><span>gama<\/span><\/a><span>\u00a0.\u00a0Eles podem ser usados \u200b\u200btamb\u00e9m para a\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/detection-neutrons\/\"><span>detec\u00e7\u00e3o de n\u00eautrons<\/span><\/a><span>\u00a0.\u00a0Para esses fins, diferentes cintiladores s\u00e3o usados.<\/span><\/p>\n<ul>\n<li><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-beta-radiation\/\"><strong><span>Part\u00edculas beta<\/span><\/strong><\/a><span>\u00a0.\u00a0Para a detec\u00e7\u00e3o de part\u00edculas beta, cintiladores org\u00e2nicos podem ser usados.\u00a0Cristais org\u00e2nicos puros incluem cristais de antraceno, estilbeno e naftaleno.\u00a0O tempo de decaimento desse tipo de f\u00f3sforo \u00e9 de aproximadamente 10 nanossegundos.\u00a0Este tipo de cristal \u00e9 freq\u00fcentemente usado na detec\u00e7\u00e3o de part\u00edculas beta.\u00a0<\/span><strong><span>Os cintiladores org\u00e2nicos<\/span><\/strong><span>\u00a0, com um<\/span><strong><span>\u00a0\u00a0Z menor<\/span><\/strong><span>\u00a0\u00a0que os cristais inorg\u00e2nicos, s\u00e3o mais adequados para a detec\u00e7\u00e3o de part\u00edculas beta de baixa energia (&lt;10 MeV).<\/span><\/li>\n<\/ul>\n<h3><span>Detec\u00e7\u00e3o de radia\u00e7\u00e3o beta usando semicondutores &#8211; Detectores de tira de silicone<\/span><\/h3>\n<figure id=\"attachment_26115\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-26115\"><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/silicon-strip-detector-semiconductors.png\"><img loading=\"lazy\" class=\"size-medium wp-image-26115 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/silicon-strip-detector-semiconductors-300x197.png\" alt=\"detector de tira de silicone - semicondutores\" width=\"300\" height=\"197\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/silicon-strip-detector-semiconductors-300x197.png\" \/><\/a><figcaption id=\"caption-attachment-26115\" class=\"wp-caption-text\"><span>Detector de tira de sil\u00edcio Fonte: micronsemiconductor.co.uk<\/span><\/figcaption><\/figure>\n<p><span>Os detectores \u00e0 base de sil\u00edcio s\u00e3o muito bons para rastrear part\u00edculas carregadas.\u00a0Um detector de tira de sil\u00edcio \u00e9 um arranjo de implantes em forma de tira que atuam como eletrodos coletores de carga.<\/span><\/p>\n<p><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-detection\/semiconductor-detectors\/silicon-based-semiconductor-detectors\/silicon-strip-detectors\/\"><strong><span>Detectores de fita de silicone<\/span><\/strong><\/a><span>\u00a05 x 5 cm<\/span><sup><span>\u00a02<\/span><\/sup><span>na \u00e1rea s\u00e3o bastante comuns e s\u00e3o usadas em s\u00e9rie (assim como os planos de MWPCs) para determinar as trajet\u00f3rias de part\u00edculas carregadas com precis\u00e3o de posi\u00e7\u00e3o da ordem de v\u00e1rios \u03bcm na dire\u00e7\u00e3o transversal.\u00a0Colocados em uma bolacha de sil\u00edcio com baixa dopagem e totalmente empobrecida, esses implantes formam uma matriz unidimensional de diodos.\u00a0Ao conectar cada uma das tiras metalizadas a um amplificador sens\u00edvel \u00e0 carga, \u00e9 constru\u00eddo um detector sens\u00edvel \u00e0 posi\u00e7\u00e3o.\u00a0\u00c9 poss\u00edvel obter medi\u00e7\u00f5es de posi\u00e7\u00e3o bidimensionais aplicando uma faixa adicional como doping na parte traseira da bolacha, usando uma tecnologia de dupla face.\u00a0Esses dispositivos podem ser usados \u200b\u200bpara medir pequenos par\u00e2metros de impacto e, assim, determinar se alguma part\u00edcula carregada se originou de uma colis\u00e3o prim\u00e1ria ou foi o produto de decomposi\u00e7\u00e3o de uma part\u00edcula prim\u00e1ria que percorreu uma pequena dist\u00e2ncia da intera\u00e7\u00e3o original e depois se deteriorou.<\/span><\/p>\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<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A detec\u00e7\u00e3o da radia\u00e7\u00e3o beta \u00e9 muito espec\u00edfica, porque as part\u00edculas beta s\u00e3o mais penetrantes que as part\u00edculas alfa.\u00a0Por outro lado, uma fina placa de alum\u00ednio pode det\u00ea-los.\u00a0Detec\u00e7\u00e3o de radia\u00e7\u00e3o beta &#8211; Detector de part\u00edculas beta Uso laboratorial de um contador Geiger com sonda na janela final para medir radia\u00e7\u00e3o beta Fonte: wikipedia.org Licen\u00e7a: Public &#8230; <a title=\"O que \u00e9 a detec\u00e7\u00e3o de radia\u00e7\u00e3o beta &#8211; Detector de part\u00edculas beta &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-a-deteccao-de-radiacao-beta-detector-de-particulas-beta-definicao\/\" aria-label=\"More on O que \u00e9 a detec\u00e7\u00e3o de radia\u00e7\u00e3o beta &#8211; Detector de part\u00edculas beta &#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 a detec\u00e7\u00e3o de radia\u00e7\u00e3o beta - Detector de part\u00edculas beta - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A detec\u00e7\u00e3o da radia\u00e7\u00e3o beta \u00e9 muito espec\u00edfica, porque as part\u00edculas beta s\u00e3o mais penetrantes que as part\u00edculas alfa. 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