{"id":17406,"date":"2020-06-13T02:32:18","date_gmt":"2020-06-13T02:32:18","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-deteccao-de-neutrons-definicao\/"},"modified":"2020-07-20T10:43:54","modified_gmt":"2020-07-20T10:43:54","slug":"o-que-e-deteccao-de-neutrons-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-deteccao-de-neutrons-definicao\/","title":{"rendered":"O que \u00e9 detec\u00e7\u00e3o de n\u00eautrons &#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\">Os n\u00eautrons n\u00e3o ionizam diretamente e geralmente precisam ser convertidos em part\u00edculas carregadas antes de serem detectadas.\u00a0Detec\u00e7\u00e3o de n\u00eautrons.\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<figure id=\"attachment_11545\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-11545\"><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/neutron-detection.png\"><img loading=\"lazy\" class=\"wp-image-11545 size-medium lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/neutron-detection-300x232.png\" alt=\"detec\u00e7\u00e3o de n\u00eautrons\" width=\"300\" height=\"232\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/neutron-detection-300x232.png\" \/><\/a><figcaption id=\"caption-attachment-11545\" class=\"wp-caption-text\">Geralmente, todo tipo de detector de n\u00eautrons deve estar equipado com conversor e um dos detectores de radia\u00e7\u00e3o convencionais.<br \/>\nFonte: large.stanford.edu<\/figcaption><\/figure>\n<p><strong>A detec\u00e7\u00e3o de n\u00eautrons<\/strong>\u00a0\u00e9 muito espec\u00edfica, uma\u00a0vez que os n\u00eautrons s\u00e3o<strong>\u00a0part\u00edculas eletricamente neutras;<\/strong>\u00a0\u00a0portanto, est\u00e3o sujeitas principalmente a fortes for\u00e7as nucleares, mas n\u00e3o a for\u00e7as el\u00e9tricas.\u00a0Portanto, os n\u00eautrons<strong>\u00a0n\u00e3o<\/strong>\u00a0s\u00e3o<strong>\u00a0diretamente ionizantes<\/strong>\u00a0e geralmente precisam ser<strong>\u00a0convertidos<\/strong>\u00a0em part\u00edculas carregadas antes que possam ser detectados.\u00a0Geralmente, todo tipo de detector de n\u00eautrons deve estar equipado com conversor (para converter a radia\u00e7\u00e3o de n\u00eautrons em radia\u00e7\u00e3o detect\u00e1vel comum) e um dos detectores de radia\u00e7\u00e3o convencionais (detector de cintila\u00e7\u00e3o, detector de gases, detector de semicondutores, etc.).<\/p>\n<h2>Conversores de n\u00eautrons<\/h2>\n<p>Dois tipos b\u00e1sicos de intera\u00e7\u00f5es de n\u00eautrons com a mat\u00e9ria est\u00e3o dispon\u00edveis para esse fim:<\/p>\n<ul>\n<li><strong><a title=\"Dispers\u00e3o El\u00e1stica de N\u00eautrons\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/nuclear-engineering-fundamentals\/neutron-nuclear-reactions\/neutron-elastic-scattering\/\">Espalhamento el\u00e1stico<\/a>\u00a0.\u00a0<\/strong>O n\u00eautron livre pode ser espalhado por um n\u00facleo, transferindo parte de sua energia cin\u00e9tica para o n\u00facleo.\u00a0Se o n\u00eautron tiver energia suficiente para dispersar os n\u00facleos, o n\u00facleo de recuo ioniza o material ao redor do conversor.\u00a0De fato,<strong>\u00a0apenas os<\/strong>\u00a0n\u00facleos de<strong>\u00a0hidrog\u00eanio e h\u00e9lio<\/strong>\u00a0s\u00e3o leves o suficiente para aplica\u00e7\u00e3o pr\u00e1tica.\u00a0A carga produzida dessa maneira pode ser coletada pelo detector convencional para produzir um sinal detectado.\u00a0Os n\u00eautrons podem transferir mais energia para os n\u00facleos leves.\u00a0Este m\u00e9todo \u00e9 apropriado para detectar<strong>\u00a0n\u00eautrons r\u00e1pidos<\/strong>\u00a0(os<strong>\u00a0n\u00eautrons<\/strong>\u00a0r\u00e1pidos n\u00e3o possuem uma se\u00e7\u00e3o transversal alta para absor\u00e7\u00e3o), permitindo a detec\u00e7\u00e3o de n\u00eautrons r\u00e1pidos sem um<a title=\"Moderador de n\u00eautrons\" href=\"https:\/\/www.nuclear-power.com\/neutron-moderator\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0moderador<\/a>\u00a0.<\/li>\n<li><strong><a title=\"Absor\u00e7\u00e3o de N\u00eautrons\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/nuclear-engineering-fundamentals\/neutron-nuclear-reactions\/neutron-absorption\/\">Absor\u00e7\u00e3o de n\u00eautrons<\/a>\u00a0.\u00a0<\/strong>Este \u00e9 um m\u00e9todo comum que permite a detec\u00e7\u00e3o de n\u00eautrons de<strong>\u00a0todo o espectro de energia<\/strong>\u00a0.\u00a0Este m\u00e9todo baseia-se em v\u00e1rias<a title=\"Rea\u00e7\u00f5es nucleares\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/nuclear-reactions\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0rea\u00e7\u00f5es<\/a>\u00a0de<a title=\"Nuclear Reactions\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/nuclear-reactions\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0absor\u00e7\u00e3o<\/a>\u00a0(<a title=\"Captura de N\u00eautrons - Captura Radiativa\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/nuclear-engineering-fundamentals\/neutron-nuclear-reactions\/neutron-capture-radiative-capture\/\">\u00a0captura de radia\u00e7\u00e3o<\/a>\u00a0,<a title=\"Fic\u00e3o nuclear\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/fission\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u00a0fiss\u00e3o nuclear<\/a>\u00a0, rea\u00e7\u00f5es de rearranjo, etc.).\u00a0O n\u00eautron \u00e9 aqui absorvido pelo material alvo (conversor) que emite<strong>\u00a0part\u00edculas secund\u00e1rias<\/strong>\u00a0, como pr\u00f3tons, part\u00edculas alfa, part\u00edculas beta, f\u00f3tons (<a title=\"Raios gama \/ radia\u00e7\u00e3o gama\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\">\u00a0raios gama<\/a>\u00a0) ou fragmentos de fiss\u00e3o.\u00a0Algumas rea\u00e7\u00f5es s\u00e3o rea\u00e7\u00f5es limiares (exigindo uma energia m\u00ednima de n\u00eautrons), mas a maioria das rea\u00e7\u00f5es ocorre nas<strong>\u00a0energias<\/strong>\u00a0epit\u00e9rmica e<strong>\u00a0t\u00e9rmica<\/strong>.\u00a0Isso significa que a modera\u00e7\u00e3o dos n\u00eautrons r\u00e1pidos \u00e9 necess\u00e1ria, levando a informa\u00e7\u00f5es de energia insuficiente dos n\u00eautrons.\u00a0Os n\u00facleos mais comuns para o material conversor de n\u00eautrons s\u00e3o:\n<ul>\n<li><strong><sup>10<\/sup>\u00a0B (n, a).\u00a0<\/strong>Onde a se\u00e7\u00e3o transversal de captura de n\u00eautrons para n\u00eautrons t\u00e9rmicos \u00e9 \u03c3 = 3820 celeiros e o<a title=\"Boro 10\" href=\"https:\/\/www.nuclear-power.com\/glossary\/boron-10\/\">\u00a0boro<\/a>\u00a0naturalpossui abund\u00e2ncia de<sup>\u00a010<\/sup>\u00a0B 19,8%.<\/li>\n<li><strong><sup>3<\/sup>\u00a0Ele (n, p).\u00a0<\/strong>Onde a se\u00e7\u00e3o transversal de captura de n\u00eautrons para n\u00eautrons t\u00e9rmicos \u00e9 \u03c3 = 5350 celeiros e o h\u00e9lio natural possui abund\u00e2ncia de<sup>\u00a03<\/sup>\u00a0He 0,014%.<\/li>\n<li><strong><sup>6<\/sup>\u00a0Li (n, a).\u00a0<\/strong>Onde a se\u00e7\u00e3o transversal de captura de n\u00eautrons para n\u00eautrons t\u00e9rmicos \u00e9 \u03c3 = 925 celeiros e o l\u00edtio natural tem abund\u00e2ncia de<sup>\u00a06<\/sup>\u00a0Li 7,4%.<\/li>\n<li><strong><sup>113<\/sup>\u00a0Cd (n, \u0263).\u00a0<\/strong>Onde a se\u00e7\u00e3o transversal de captura de n\u00eautrons para n\u00eautrons t\u00e9rmicos \u00e9 \u03c3 = 20820 celeiros e o<a title=\"C\u00e1dmio\" href=\"https:\/\/www.nuclear-power.com\/glossary\/cadmium\/\">\u00a0c\u00e1dmio<\/a>\u00a0naturalpossui abund\u00e2ncia de<sup>\u00a0113<\/sup>\u00a0Cd 12,2%.<\/li>\n<li><strong><sup>235<\/sup>\u00a0U (n, fiss\u00e3o).\u00a0<\/strong>Onde a se\u00e7\u00e3o de fiss\u00e3o para n\u00eautrons t\u00e9rmicos \u00e9 \u03c3 = 585 celeiros e o ur\u00e2nio natural tem abund\u00e2ncia de<sup>\u00a0235<\/sup>\u00a0U 0,711%.\u00a0O ur\u00e2nio como conversor produz fragmentos de fiss\u00e3o que s\u00e3o part\u00edculas carregadas pesadas.\u00a0Isso tem uma vantagem significativa.\u00a0As part\u00edculas carregadas pesadas (fragmentos de fiss\u00e3o) criam um sinal de sa\u00edda alto, porque os fragmentos depositam uma grande quantidade de energia em um volume sens\u00edvel ao detector.\u00a0Isso permite uma discrimina\u00e7\u00e3o f\u00e1cil da radia\u00e7\u00e3o de fundo (radia\u00e7\u00e3o ei gama).\u00a0Esta caracter\u00edstica importante pode ser usada, por exemplo, em uma medi\u00e7\u00e3o de pot\u00eancia de reator nuclear, em que o campo de n\u00eautrons \u00e9 acompanhado por um fundo gama significativo.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Detec\u00e7\u00e3o de n\u00eautrons t\u00e9rmicos<\/h2>\n<p><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/thermal-neutron\/\"><strong>N\u00eautrons t\u00e9rmicos<\/strong><\/a>\u00a0s\u00e3o n\u00eautrons em equil\u00edbrio t\u00e9rmico com um meio ambiente de temperatura 290K (17 \u00b0 C ou 62 \u00b0 F).\u00a0A energia mais prov\u00e1vel a 17 \u00b0 C (62 \u00b0 F) para a distribui\u00e7\u00e3o Maxwelliana \u00e9 de<strong>\u00a00,025 eV<\/strong>\u00a0(~ 2 km \/ s).\u00a0Essa parte do espectro de energia dos n\u00eautrons constitui a parte mais importante do espectro<strong>\u00a0em reatores t\u00e9rmicos<\/strong>\u00a0.<\/p>\n<p>Os n\u00eautrons t\u00e9rmicos t\u00eam uma\u00a0<a href=\"https:\/\/www.nuclear-power.com\/neutron-cross-section\/\"><strong>se\u00e7\u00e3o transversal de<\/strong><\/a><strong>\u00a0absor\u00e7\u00e3o de n\u00eautrons eficaz<\/strong>\u00a0diferente e muitas vezes muito\u00a0<strong>maior<\/strong>\u00a0(\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/fission\/\">fiss\u00e3o<\/a>\u00a0ou\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/nuclear-engineering-fundamentals\/neutron-nuclear-reactions\/neutron-capture-radiative-capture\/\">captura radiativa<\/a>\u00a0) para um determinado nucl\u00eddeo que os n\u00eautrons r\u00e1pidos.<\/p>\n<p>Em geral, existem muitos princ\u00edpios de detec\u00e7\u00e3o e muitos tipos de detectores.\u00a0Nos reatores nucleares, os detectores de ioniza\u00e7\u00e3o gasosa s\u00e3o os mais comuns, pois s\u00e3o muito eficientes, confi\u00e1veis \u200b\u200be cobrem uma ampla gama de fluxos de n\u00eautrons.\u00a0V\u00e1rios tipos de detectores de ioniza\u00e7\u00e3o gasosa constituem o chamado\u00a0\u00a0<strong><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-reactor\/nuclear-instrumentation\/excore-nuclear-instrumentation\/\">sistema de instrumenta\u00e7\u00e3o nuclear excore<\/a>\u00a0(NIS)<\/strong>\u00a0.\u00a0O sistema de instrumenta\u00e7\u00e3o nuclear excore monitora o n\u00edvel de pot\u00eancia do reator\u00a0\u00a0<strong>detectando vazamentos de n\u00eautrons<\/strong>\u00a0\u00a0do n\u00facleo do reator.<\/p>\n<h3><span id=\"Detection_of_Neutrons_using_Ionization_Chamber\">Detec\u00e7\u00e3o de n\u00eautrons usando c\u00e2mara de ioniza\u00e7\u00e3o<\/span><\/h3>\n<p><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-detection\/gaseous-ionization-detector\/ionization-chamber-ion-chamber\/applications-of-ionization-chambers\/\"><span>C\u00e2maras de ioniza\u00e7\u00e3o<\/span><\/a><span>\u00a0s\u00e3o frequentemente usadas como dispositivo de detec\u00e7\u00e3o de part\u00edculas carregadas.\u00a0Por exemplo, se a superf\u00edcie interna da c\u00e2mara de ioniza\u00e7\u00e3o for revestida com uma fina camada de boro, a rea\u00e7\u00e3o (n, alfa) poder\u00e1 ocorrer.\u00a0A maioria das rea\u00e7\u00f5es (n, alfa) dos n\u00eautrons t\u00e9rmicos s\u00e3o rea\u00e7\u00f5es\u00a0\u00a0<\/span><strong><span>10B (n, alfa) 7Li\u00a0<\/span><\/strong><span>\u00a0acompanhadas por 0,48 MeV\u00a0<\/span><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Boron-neutron-reaction.png\"><img loading=\"lazy\" class=\"lazy-loaded aligncenter wp-image-12477 size-full\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Boron-neutron-reaction.png\" alt=\"(n, alfa) rea\u00e7\u00f5es de 10B\" width=\"665\" height=\"99\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Boron-neutron-reaction.png\" data-srcset=\"\" \/><\/a><\/p>\n<p><span>Al\u00e9m disso, o is\u00f3topo boro-10 possui uma alta se\u00e7\u00e3o transversal da rea\u00e7\u00e3o (n, alfa) ao longo de todo\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/neutron-energy\/\"><span>o espectro de energia de n\u00eautrons<\/span><\/a><span>\u00a0.\u00a0A part\u00edcula alfa causa ioniza\u00e7\u00e3o dentro da c\u00e2mara e el\u00e9trons ejetados causam ioniza\u00e7\u00f5es secund\u00e1rias adicionais.<\/span><\/p>\n<p><span>Outro m\u00e9todo para detectar n\u00eautrons usando uma c\u00e2mara de ioniza\u00e7\u00e3o \u00e9 usar o\u00a0<\/span><strong><span>trifluoreto de boro<\/span><\/strong><span>\u00a0gasoso\u00a0\u00a0\u00a0(BF\u00a0<\/span><sub><span>3<\/span><\/sub><span>\u00a0) em vez do ar na c\u00e2mara.\u00a0Os n\u00eautrons recebidos produzem part\u00edculas alfa quando reagem com os \u00e1tomos de boro no g\u00e1s detector.\u00a0Qualquer um dos m\u00e9todos pode ser usado para detectar n\u00eautrons no reator nuclear.\u00a0Deve-se notar que os\u00a0\u00a0contadores\u00a0BF\u00a0<\/span><sub><span>3<\/span><\/sub><span>\u00a0geralmente s\u00e3o operados na regi\u00e3o proporcional.<\/span><\/p>\n<h3><span id=\"Fission_Chamber_8211_Wide_Range_Detectors\"><span>C\u00e2mara de fiss\u00e3o &#8211; detectores de ampla faixa<\/span><\/span><\/h3>\n<p><strong><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-reactor\/nuclear-instrumentation\/excore-nuclear-instrumentation\/fission-chamber-wide-range-detectors\/\"><span><img src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/fission-chamber-detection-of-neutrons.png\" \/>As c\u00e2maras de fiss\u00e3o<\/span><\/a><\/strong><span>\u00a0\u00a0s\u00e3o detectores de ioniza\u00e7\u00e3o usados \u200b\u200bpara detectar n\u00eautrons.\u00a0As c\u00e2maras de fiss\u00e3o podem ser usadas como detectores de faixa intermedi\u00e1ria para monitorar o fluxo de n\u00eautrons (pot\u00eancia do reator) no n\u00edvel do fluxo intermedi\u00e1rio.\u00a0Eles tamb\u00e9m fornecem indica\u00e7\u00e3o, alarmes e sinais de disparo do reator.\u00a0O design deste instrumento \u00e9 escolhido para fornecer sobreposi\u00e7\u00e3o entre os canais da faixa da fonte e a amplitude total dos instrumentos da faixa de pot\u00eancia.<\/span><\/p>\n<p><span>No caso de\u00a0<\/span><strong><span>c\u00e2maras<\/span><\/strong><span>\u00a0de\u00a0\u00a0<strong>fiss\u00e3o<\/strong>\u00a0, a c\u00e2mara \u00e9 revestida com uma fina camada de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-fuel\/uranium\/uranium-235\/\"><span>ur\u00e2nio 235<\/span><\/a><span>\u00a0altamente enriquecido\u00a0\u00a0\u00a0para detectar n\u00eautrons.\u00a0Os n\u00eautrons\u00a0\u00a0<\/span><strong><span>n\u00e3o ionizam diretamente<\/span><\/strong><span>\u00a0\u00a0e geralmente precisam ser\u00a0\u00a0<\/span><strong><span>convertidos<\/span><\/strong><span>\u00a0\u00a0em part\u00edculas carregadas antes de serem detectadas.\u00a0Um\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/thermal-neutron\/\"><span>n\u00eautron t\u00e9rmico<\/span><\/a><span>\u00a0\u00a0causar\u00e1 a\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/fission\/\"><span>fiss\u00e3o de<\/span><\/a><span>\u00a0um \u00e1tomo de ur\u00e2nio-235\u00a0\u00a0, com os dois\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/fission\/fission-fragments\/\"><span>fragmentos de fiss\u00e3o<\/span><\/a><span>\u00a0\u00a0produzidos com alta\u00a0\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/what-is-kinetic-energy\/\"><span>energia cin\u00e9tica<\/span><\/a><span>\u00a0\u00a0e causando ioniza\u00e7\u00e3o do g\u00e1s arg\u00f4nio no detector.\u00a0Uma vantagem do uso de revestimento de ur\u00e2nio-235 em vez do boro-10 \u00e9 que os fragmentos de fiss\u00e3o t\u00eam uma energia muito maior do que a part\u00edcula alfa de uma rea\u00e7\u00e3o de boro.\u00a0Portanto\u00a0<\/span><strong><span>As c\u00e2maras de fiss\u00e3o<\/span><\/strong><span>\u00a0\u00a0s\u00e3o\u00a0\u00a0<\/span><strong><span>muito sens\u00edveis<\/span><\/strong><span>\u00a0\u00a0ao fluxo de n\u00eautrons e isso permite que as c\u00e2maras de fiss\u00e3o operem em\u00a0\u00a0<\/span><strong><span>campos gama mais altos do<\/span><\/strong><span>\u00a0\u00a0que uma c\u00e2mara de \u00edons descompensada com revestimento de boro.<\/span><\/p>\n<h3><span>Folhas de ativa\u00e7\u00e3o e fios de fluxo<\/span><\/h3>\n<p><span>Os n\u00eautrons podem ser detectados usando\u00a0<\/span><strong><span>folhas de ativa\u00e7\u00e3o<\/span><\/strong><span>\u00a0e\u00a0<\/span><strong><span>fios de fluxo<\/span><\/strong><span>\u00a0.\u00a0Este m\u00e9todo \u00e9 baseado na ativa\u00e7\u00e3o de n\u00eautrons, onde uma amostra analisada \u00e9\u00a0<\/span><strong><span>primeiro irradiada<\/span><\/strong><span>\u00a0com n\u00eautrons para produzir\u00a0<\/span><strong><span>radionucl\u00eddeos espec\u00edficos<\/span><\/strong><span>\u00a0.\u00a0O decaimento radioativo desses radionucl\u00eddeos produzidos \u00e9 espec\u00edfico para cada elemento (nucl\u00eddeo).\u00a0Cada nucl\u00eddeo emite os\u00a0<\/span><strong><span>raios gama caracter\u00edsticos<\/span><\/strong><span>\u00a0que s\u00e3o medidos usando\u00a0<\/span><strong><span>espectroscopia gama<\/span><\/strong><span>\u00a0, onde os raios gama detectados em uma energia espec\u00edfica s\u00e3o indicativos de um radionucl\u00eddeo espec\u00edfico e determinam as concentra\u00e7\u00f5es dos elementos.<\/span><\/p>\n<p><span>Os materiais selecionados para folhas de ativa\u00e7\u00e3o s\u00e3o, por exemplo:<\/span><\/p>\n<ul>\n<li><strong><span>\u00edndio,<\/span><\/strong><\/li>\n<li><strong><span>ouro,<\/span><\/strong><\/li>\n<li><strong><span>r\u00f3dio,<\/span><\/strong><\/li>\n<li><strong><span>ferro<\/span><\/strong><\/li>\n<li><strong><span>alum\u00ednio \u2009<\/span><\/strong><\/li>\n<li><strong><span>ni\u00f3bio<\/span><\/strong><\/li>\n<\/ul>\n<p><span>Esses elementos t\u00eam\u00a0<\/span><strong><span>grandes se\u00e7\u00f5es transversais<\/span><\/strong><span>\u00a0para a\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/nuclear-engineering-fundamentals\/neutron-nuclear-reactions\/neutron-capture-radiative-capture\/\"><span>captura radiativa de n\u00eautrons<\/span><\/a><span>\u00a0.\u00a0O uso de m\u00faltiplas amostras de absorvedores permite a caracteriza\u00e7\u00e3o do espectro de energia de n\u00eautrons.\u00a0A ativa\u00e7\u00e3o tamb\u00e9m permite a recrea\u00e7\u00e3o de uma exposi\u00e7\u00e3o hist\u00f3rica a n\u00eautrons.\u00a0Os dos\u00edmetros de acidentes por criticidade comercialmente dispon\u00edveis geralmente utilizam esse m\u00e9todo.\u00a0Medindo a\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/radioactivity-nuclear-decay\/\"><span>radioatividade<\/span><\/a><span>\u00a0de folhas finas, podemos determinar a quantidade de n\u00eautrons a que as folhas foram expostas.<\/span><\/p>\n<p><strong><span>Os fios de fluxo<\/span><\/strong><span>\u00a0podem ser usados \u200b\u200bem reatores nucleares para medir os perfis de fluxo de n\u00eautrons do reator.\u00a0Princ\u00edpios s\u00e3o os mesmos.\u00a0O fio ou a folha \u00e9 inserido diretamente no\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-reactor-core\/\"><span>n\u00facleo<\/span><\/a><span>\u00a0do\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-reactor-core\/\">reator<\/a>\u00a0, permanece no n\u00facleo pelo per\u00edodo de tempo necess\u00e1rio para a ativa\u00e7\u00e3o no n\u00edvel desejado.\u00a0Ap\u00f3s a ativa\u00e7\u00e3o, o fio ou a pel\u00edcula de fluxo \u00e9 rapidamente removido do n\u00facleo do reator e a atividade \u00e9 contada.\u00a0As folhas ativadas tamb\u00e9m podem discriminar os n\u00edveis de energia, colocando uma cobertura sobre a folha para filtrar (absorver) certos n\u00eautrons do n\u00edvel de energia.\u00a0Por exemplo, o\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/glossary\/cadmium\/\"><span>c\u00e1dmio<\/span><\/a><span>\u00a0\u00e9 amplamente utilizado para absorver n\u00eautrons t\u00e9rmicos em filtros de n\u00eautrons t\u00e9rmicos.<\/span><\/p>\n<h2><span>Detec\u00e7\u00e3o de n\u00eautrons r\u00e1pidos<\/span><\/h2>\n<p><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/fast-neutrons-high-energy-neutrons\/\"><strong><span>N\u00eautrons r\u00e1pidos<\/span><\/strong><\/a><span>\u00a0s\u00e3o n\u00eautrons de<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/what-is-kinetic-energy\/\"><span>\u00a0energia cin\u00e9tica<\/span><\/a><span>\u00a0maiores que 1 MeV (~ 15.000 km \/ s).\u00a0Nos reatores nucleares, esses n\u00eautrons s\u00e3o geralmente chamados de n\u00eautrons de fiss\u00e3o.\u00a0Os n\u00eautrons de fiss\u00e3o t\u00eam uma distribui\u00e7\u00e3o de energia de Maxwell-Boltzmann com uma energia m\u00e9dia (para<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-fuel\/uranium\/uranium-235\/\"><span>\u00a0fiss\u00e3o de 235U<\/span><\/a><span>\u00a0) 2 MeV.\u00a0Dentro de um<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-reactor\/\"><span>\u00a0reator nuclear,<\/span><\/a><span>\u00a0os n\u00eautrons r\u00e1pidos s\u00e3o reduzidos \u00e0s energias t\u00e9rmicas atrav\u00e9s de um processo chamado<\/span><a href=\"https:\/\/www.nuclear-power.com\/neutron-moderator\/\"><span>\u00a0modera\u00e7\u00e3o de n\u00eautrons<\/span><\/a><span>\u00a0.\u00a0Esses n\u00eautrons tamb\u00e9m s\u00e3o produzidos por processos nucleares, como fiss\u00e3o nuclear ou<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/nuclear-reactions\/\"><span>\u00a0rea\u00e7\u00f5es<\/span><\/a><span>\u00a0(\u0251, n).<\/span><\/p>\n<p><span>Em geral, existem muitos\u00a0<\/span><strong><span>princ\u00edpios de detec\u00e7\u00e3o<\/span><\/strong><span>\u00a0e muitos tipos de detectores.\u00a0Mas \u00e9 preciso acrescentar que a\u00a0<\/span><strong><span>detec\u00e7\u00e3o de n\u00eautrons r\u00e1pidos<\/span><\/strong><span>\u00a0\u00e9 uma disciplina muito sofisticada, pois a se\u00e7\u00e3o transversal dos n\u00eautrons r\u00e1pidos \u00e9 muito menor do que na faixa de energia dos n\u00eautrons lentos.\u00a0Os n\u00eautrons r\u00e1pidos s\u00e3o frequentemente detectados pela modera\u00e7\u00e3o (desacelera\u00e7\u00e3o) das energias t\u00e9rmicas.\u00a0No entanto, durante esse processo, as informa\u00e7\u00f5es sobre a energia original do n\u00eautron, sua dire\u00e7\u00e3o de viagem e o tempo de emiss\u00e3o s\u00e3o perdidas.<\/span><\/p>\n<h3><span>Recoil de pr\u00f3tons &#8211; detectores de recuo<\/span><\/h3>\n<p><span>O tipo mais importante de detectores para n\u00eautrons r\u00e1pidos s\u00e3o aqueles que detectam diretamente\u00a0<\/span><strong><span>part\u00edculas de recolhimento<\/span><\/strong><span>\u00a0, em particular\u00a0<\/span><strong><span>pr\u00f3tons de recolhimento<\/span><\/strong><span>\u00a0resultantes da dispers\u00e3o el\u00e1stica (n, p).\u00a0De fato, apenas os n\u00facleos de hidrog\u00eanio e h\u00e9lio s\u00e3o leves o suficiente para aplica\u00e7\u00e3o pr\u00e1tica.\u00a0Neste \u00faltimo caso, as part\u00edculas de recuo s\u00e3o detectadas em um detector.\u00a0Os n\u00eautrons podem transferir mais energia para os n\u00facleos leves.\u00a0Este m\u00e9todo \u00e9 apropriado para detectar n\u00eautrons r\u00e1pidos, permitindo a detec\u00e7\u00e3o de n\u00eautrons r\u00e1pidos sem um\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/neutron-moderator\/\"><span>moderador<\/span><\/a><span>\u00a0.\u00a0Este m\u00e9todo permite que a energia do n\u00eautron seja medida juntamente com a flu\u00eancia do n\u00eautron, ou seja, o detector pode ser usado como um espectr\u00f4metro.\u00a0Os detectores r\u00e1pidos de n\u00eautrons t\u00edpicos s\u00e3o\u00a0<\/span><strong><span>cintiladores l\u00edquidos<\/span><\/strong><span>, detectores de g\u00e1s nobre \u00e0 base de h\u00e9lio-4 e detectores de pl\u00e1stico (cintiladores).\u00a0Por exemplo, o pl\u00e1stico tem um alto teor de hidrog\u00eanio, portanto, \u00e9 \u00fatil para\u00a0<\/span><strong><span>detectores r\u00e1pidos de n\u00eautrons<\/span><\/strong><span>\u00a0, quando usado como cintilador.<\/span><\/p>\n<h3><span>Espectr\u00f4metro de esferas Bonner<\/span><\/h3>\n<p><span>Existem v\u00e1rios m\u00e9todos para detectar n\u00eautrons lentos e poucos m\u00e9todos para detectar n\u00eautrons r\u00e1pidos.\u00a0Portanto, uma t\u00e9cnica para medir n\u00eautrons r\u00e1pidos \u00e9 convert\u00ea-los em<\/span><br \/>\n<span>n\u00eautrons\u00a0lentos\u00a0e depois medir os n\u00eautrons lentos.\u00a0Um dos m\u00e9todos poss\u00edveis \u00e9 baseado nas\u00a0<\/span><strong><span>esferas de Bonner<\/span><\/strong><span>\u00a0.\u00a0O m\u00e9todo foi descrito pela primeira vez em 1960 por Ewing e Tom W. Bonner e emprega detectores t\u00e9rmicos de n\u00eautrons (geralmente cintiladores inorg\u00e2nicos como o\u00a0<\/span><sup><span>6<\/span><\/sup><span>\u00a0LiI) embutidos em esferas moderadoras de tamanhos diferentes. \u00a0<\/span><strong><span>As esferas de Bonner<\/span><\/strong><span>\u00a0t\u00eam sido amplamente utilizadas para a medi\u00e7\u00e3o de espectros de n\u00eautrons com energias de n\u00eautrons variando de t\u00e9rmicas a pelo menos 20 MeV.\u00a0Um espectr\u00f4metro de n\u00eautrons de esfera Bonner (BSS) consiste em um detector de n\u00eautrons t\u00e9rmicos, um conjunto de\u00a0<\/span><strong><span>inv\u00f3lucros esf\u00e9ricos de polietileno<\/span><\/strong><span>e duas cascas de chumbo opcionais de v\u00e1rios tamanhos.\u00a0Para detectar n\u00eautrons t\u00e9rmicos, um\u00a0detector de\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0He ou cintiladores inorg\u00e2nicos como\u00a0<\/span><sup><span>6<\/span><\/sup><span>\u00a0LiI podem ser usados.\u00a0Os cintiladores LiGlass s\u00e3o muito populares na detec\u00e7\u00e3o de n\u00eautrons t\u00e9rmicos.\u00a0A vantagem dos cintiladores LiGlass \u00e9 a estabilidade e a grande variedade de tamanhos.<\/span><\/p>\n<h3><span id=\"Detection_of_Alpha_Beta_and_Gamma_Radiation_using_Scintillation_Counter\"><span>Detec\u00e7\u00e3o de n\u00eautrons usando o contador de cintila\u00e7\u00e3o<\/span><\/span><\/h3>\n<p><strong><span>Os contadores de cintila\u00e7\u00e3o<\/span><\/strong><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\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/radiation-protection\/protection-from-exposures\/radioactive-contamination\/\"><span>contamina\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\/atomic-nuclear-physics\/fundamental-particles\/neutron\/interactions-neutrons-matter\/\"><strong><span>N\u00eautrons<\/span><\/strong><\/a><span>\u00a0.\u00a0Como os n\u00eautrons s\u00e3o\u00a0<\/span><strong><span>\u00a0part\u00edculas eletricamente neutras,<\/span><\/strong><span>\u00a0\u00a0elas est\u00e3o sujeitas principalmente a\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-interactions-fundamental-forces\/strong-interaction-strong-force\/\"><span>\u00a0fortes for\u00e7as nucleares,<\/span><\/a><span>\u00a0\u00a0mas n\u00e3o a for\u00e7as el\u00e9tricas.\u00a0Portanto, os n\u00eautrons<\/span><strong><span>\u00a0n\u00e3o<\/span><\/strong><span>\u00a0s\u00e3o\u00a0<strong>\u00a0diretamente ionizantes<\/strong>\u00a0\u00a0e geralmente precisam ser\u00a0<\/span><strong><span>\u00a0convertidos<\/span><\/strong><span>\u00a0\u00a0em part\u00edculas carregadas antes de serem detectados.\u00a0Geralmente, todo tipo de detector de n\u00eautrons deve estar equipado com conversor (para converter a radia\u00e7\u00e3o de n\u00eautrons em radia\u00e7\u00e3o detect\u00e1vel comum) e um dos detectores de radia\u00e7\u00e3o convencionais (detector de cintila\u00e7\u00e3o, detector de gases, detector de semicondutores, etc.). \u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/fast-neutrons-high-energy-neutrons\/\"><span>Os n\u00eautrons r\u00e1pidos<\/span><\/a><span>\u00a0\u00a0(&gt; 0,5 MeV) dependem principalmente do pr\u00f3ton de recuo nas rea\u00e7\u00f5es (n, p).\u00a0Materiais ricos em hidrog\u00eanio, por exemplo,\u00a0<\/span><strong><span>\u00a0cintiladores pl\u00e1sticos<\/span><\/strong><span>, portanto, s\u00e3o mais adequados para sua detec\u00e7\u00e3o.\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/thermal-neutron\/\"><span>Os n\u00eautrons t\u00e9rmicos<\/span><\/a><span>\u00a0\u00a0dependem de rea\u00e7\u00f5es nucleares, como as rea\u00e7\u00f5es (n, \u03b3) ou (n, \u03b1), para produzir ioniza\u00e7\u00e3o.\u00a0Materiais como LiI (Eu) ou silicatos de vidro s\u00e3o, portanto, particularmente adequados para a detec\u00e7\u00e3o de n\u00eautrons t\u00e9rmicos.\u00a0A vantagem dos cintiladores 6LiGlass \u00e9 a estabilidade e a grande variedade de tamanhos.<\/span><\/li>\n<\/ul>\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>Os n\u00eautrons n\u00e3o ionizam diretamente e geralmente precisam ser convertidos em part\u00edculas carregadas antes de serem detectadas.\u00a0Detec\u00e7\u00e3o de n\u00eautrons.\u00a0Dosimetria de Radia\u00e7\u00e3o Geralmente, todo tipo de detector de n\u00eautrons deve estar equipado com conversor e um dos detectores de radia\u00e7\u00e3o convencionais. Fonte: large.stanford.edu A detec\u00e7\u00e3o de n\u00eautrons\u00a0\u00e9 muito espec\u00edfica, uma\u00a0vez que os n\u00eautrons s\u00e3o\u00a0part\u00edculas eletricamente neutras;\u00a0\u00a0portanto, &#8230; <a title=\"O que \u00e9 detec\u00e7\u00e3o de n\u00eautrons &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-deteccao-de-neutrons-definicao\/\" aria-label=\"More on O que \u00e9 detec\u00e7\u00e3o de n\u00eautrons &#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 detec\u00e7\u00e3o de n\u00eautrons - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Os n\u00eautrons n\u00e3o ionizam diretamente e geralmente precisam ser convertidos em part\u00edculas carregadas antes de serem detectadas. Detec\u00e7\u00e3o de n\u00eautrons. 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-deteccao-de-neutrons-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 detec\u00e7\u00e3o de n\u00eautrons - Defini\u00e7\u00e3o\" \/>\n<meta property=\"og:description\" content=\"Os n\u00eautrons n\u00e3o ionizam diretamente e geralmente precisam ser convertidos em part\u00edculas carregadas antes de serem detectadas. Detec\u00e7\u00e3o de n\u00eautrons. Dosimetria de Radia\u00e7\u00e3o\" \/>\n<meta property=\"og:url\" content=\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-deteccao-de-neutrons-definicao\/\" \/>\n<meta property=\"og:site_name\" content=\"Radiation Dosimetry\" \/>\n<meta property=\"article:published_time\" content=\"2020-06-13T02:32:18+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-07-20T10:43:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/neutron-detection-300x232.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\">\n\t<meta name=\"twitter:data1\" content=\"Nick Connor\">\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\">\n\t<meta name=\"twitter:data2\" content=\"11 minutos\">\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.radiation-dosimetry.org\/#website\",\"url\":\"https:\/\/www.radiation-dosimetry.org\/\",\"name\":\"Radiation Dosimetry\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/www.radiation-dosimetry.org\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-BR\"},{\"@type\":\"ImageObject\",\"@id\":\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-deteccao-de-neutrons-definicao\/#primaryimage\",\"inLanguage\":\"pt-BR\",\"url\":\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/neutron-detection-300x232.png\"},{\"@type\":\"WebPage\",\"@id\":\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-deteccao-de-neutrons-definicao\/#webpage\",\"url\":\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-deteccao-de-neutrons-definicao\/\",\"name\":\"O que \\u00e9 detec\\u00e7\\u00e3o de n\\u00eautrons - Defini\\u00e7\\u00e3o\",\"isPartOf\":{\"@id\":\"https:\/\/www.radiation-dosimetry.org\/#website\"},\"primaryImageOfPage\":{\"@id\":\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-deteccao-de-neutrons-definicao\/#primaryimage\"},\"datePublished\":\"2020-06-13T02:32:18+00:00\",\"dateModified\":\"2020-07-20T10:43:54+00:00\",\"author\":{\"@id\":\"https:\/\/www.radiation-dosimetry.org\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\"},\"description\":\"Os n\\u00eautrons n\\u00e3o ionizam diretamente e geralmente precisam ser convertidos em part\\u00edculas carregadas antes de serem detectadas. Detec\\u00e7\\u00e3o de n\\u00eautrons. Dosimetria de Radia\\u00e7\\u00e3o\",\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"http:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-deteccao-de-neutrons-definicao\/\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.radiation-dosimetry.org\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\",\"name\":\"Nick Connor\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","_links":{"self":[{"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/posts\/17406"}],"collection":[{"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/comments?post=17406"}],"version-history":[{"count":0,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/posts\/17406\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/media?parent=17406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/categories?post=17406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.radiation-dosimetry.org\/pt-br\/wp-json\/wp\/v2\/tags?post=17406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}