{"id":18261,"date":"2020-06-27T19:42:38","date_gmt":"2020-06-27T19:42:38","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/o-que-e-a-formula-de-compton-definicao\/"},"modified":"2020-07-24T10:46:35","modified_gmt":"2020-07-24T10:46:35","slug":"o-que-e-a-formula-de-compton-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-a-formula-de-compton-definicao\/","title":{"rendered":"O que \u00e9 a f\u00f3rmula de Compton &#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 f\u00f3rmula de Compton foi publicada em 1923 na Physical Review.\u00a0Compton explicou que o deslocamento dos raios X \u00e9 causado pelo momento de part\u00edculas dos f\u00f3tons.\u00a0Comprimento de onda de Compton<\/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<div class=\"su-spacer\"><\/div>\n<h2>Efeito Compton<\/h2>\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-spacer\"><\/div>\n<h2>F\u00f3rmula de dispers\u00e3o de Compton<\/h2>\n<figure id=\"attachment_11831\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-11831\"><img src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/compton-scattering.gif\" alt=\"Compton Scattering\" \/><figcaption id=\"caption-attachment-11831\" class=\"wp-caption-text\">Na dispers\u00e3o de Compton, o f\u00f3ton de raios gama incidente \u00e9 desviado atrav\u00e9s de um \u00e2ngulo respect em rela\u00e7\u00e3o \u00e0 sua dire\u00e7\u00e3o original.\u00a0Essa deflex\u00e3o resulta em uma diminui\u00e7\u00e3o na energia (diminui\u00e7\u00e3o na frequ\u00eancia do f\u00f3ton) do f\u00f3ton e \u00e9 chamado de efeito Compton.<br \/>\nFonte: hyperphysics.phy-astr.gsu.edu<\/figcaption><\/figure>\n<p>A f\u00f3rmula de Compton foi publicada em 1923 na Physical Review.\u00a0Compton explicou que o deslocamento dos raios X \u00e9 causado pelo momento de part\u00edculas dos f\u00f3tons.\u00a0A f\u00f3rmula de dispers\u00e3o de Compton \u00e9 a rela\u00e7\u00e3o matem\u00e1tica entre a mudan\u00e7a no comprimento de onda e o \u00e2ngulo de dispers\u00e3o dos raios-X.\u00a0No caso da dispers\u00e3o de Compton, o f\u00f3ton de frequ\u00eancia\u00a0<i>f<\/i>\u00a0colide com um el\u00e9tron em repouso.\u00a0Ap\u00f3s a colis\u00e3o, o f\u00f3ton ricocheteia o el\u00e9tron, liberando parte de sua energia inicial (dada pela f\u00f3rmula E = hf de Planck). Enquanto o el\u00e9tron ganha impulso (massa x velocidade), o\u00a0<strong>f\u00f3ton n\u00e3o pode diminuir sua velocidade<\/strong>\u00a0.\u00a0Como resultado da lei de conserva\u00e7\u00e3o do momento, o f\u00f3ton deve diminuir seu momento dado por:<a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Photon-momentum-formula.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-11876 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Photon-momentum-formula.png\" alt=\"Como resultado da lei de conserva\u00e7\u00e3o do momento, o f\u00f3ton deve diminuir seu momento dado por esta f\u00f3rmula.\" width=\"177\" height=\"59\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Photon-momentum-formula.png\" \/><\/a>Portanto, a diminui\u00e7\u00e3o do momento do f\u00f3ton deve ser traduzida em\u00a0<strong>diminui\u00e7\u00e3o da frequ\u00eancia<\/strong>\u00a0(aumento no comprimento de onda \u0394\u00a0<b>\u03bb = \u03bb &#8216;- \u03bb<\/b>\u00a0).\u00a0A mudan\u00e7a do comprimento de onda aumentou com o \u00e2ngulo de dispers\u00e3o, de acordo com\u00a0<strong>a f\u00f3rmula de Compton<\/strong>\u00a0:<strong><a href=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Compton-Scattering-Formula.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-11876 lazy-loaded\" src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Compton-Scattering-Formula.png\" alt=\"O deslocamento do comprimento de onda aumentou com o \u00e2ngulo de dispers\u00e3o de acordo com a f\u00f3rmula de Compton\" width=\"236\" height=\"64\" data-lazy-type=\"image\" data-src=\"https:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Compton-Scattering-Formula.png\" \/><\/a><\/strong>onde\u00a0<b>\u03bb<\/b>\u00a0\u00e9 o comprimento de onda inicial do f\u00f3ton\u00a0<b>\u03bb &#8216;<\/b>\u00a0\u00e9 o comprimento de onda ap\u00f3s a dispers\u00e3o,\u00a0<b>h<\/b>\u00a0\u00e9 a constante de Planck = 6,626 x 10\u00a0<sup>-34<\/sup>\u00a0Js\u00a0<b>m\u00a0<\/b><b><sub>e<\/sub><\/b>\u00a0\u00e9 a massa de repouso do el\u00e9tron (0,511 MeV)\u00a0<b>c<\/b>\u00a0\u00e9 a velocidade da luz\u00a0<b>\u0398<\/b>\u00a0\u00e9 o \u00e2ngulo de dispers\u00e3o . A mudan\u00e7a m\u00ednima no comprimento de onda (\u00a0<i>\u03bb \u2032<\/i>\u00a0&#8211;\u00a0<i>\u03bb<\/i>\u00a0) para o f\u00f3ton ocorre quando \u0398 = 0 \u00b0 (cos (\u0398) = 1) e \u00e9 pelo menos zero.\u00a0A varia\u00e7\u00e3o m\u00e1xima no comprimento de onda (\u00a0<i>\u03bb \u2032<\/i>\u00a0&#8211;\u00a0<i>\u03bb<\/i>) para o f\u00f3ton ocorre quando \u0398 = 180 \u00b0 (cos (\u0398) = &#8211; 1).\u00a0Neste caso, o f\u00f3ton transfere para o el\u00e9tron o m\u00e1ximo de momento poss\u00edvel. A varia\u00e7\u00e3o m\u00e1xima no comprimento de onda pode ser derivada da f\u00f3rmula de Compton:<a href=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Compton-length.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-11867 lazy-loaded\" src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Compton-length.png\" alt=\"A mudan\u00e7a m\u00e1xima no comprimento de onda pode ser derivada da f\u00f3rmula de Compton. Comprimento Compton\" width=\"561\" height=\"78\" data-lazy-type=\"image\" data-src=\"http:\/\/www.radiation-dosimetry.org\/wp-content\/uploads\/2019\/12\/Compton-length.png\" \/><\/a>A quantidade h \/ m\u00a0<sub>e<\/sub>\u00a0c \u00e9 conhecida como\u00a0<strong>comprimento<\/strong>\u00a0de\u00a0<strong>onda<\/strong>\u00a0do el\u00e9tron de\u00a0<strong>Compton<\/strong>\u00a0e \u00e9 igual a\u00a0<strong>2,43 \u00d7 10\u00a0<sup>\u221212<\/sup>\u00a0m<\/strong>\u00a0.<\/p>\n<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-default\"><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/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>A f\u00f3rmula de Compton foi publicada em 1923 na Physical Review.\u00a0Compton explicou que o deslocamento dos raios X \u00e9 causado pelo momento de part\u00edculas dos f\u00f3tons.\u00a0Comprimento de onda de Compton Efeito Compton F\u00f3rmula de dispers\u00e3o de Compton Na dispers\u00e3o de Compton, o f\u00f3ton de raios gama incidente \u00e9 desviado atrav\u00e9s de um \u00e2ngulo respect em &#8230; <a title=\"O que \u00e9 a f\u00f3rmula de Compton &#8211; defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/o-que-e-a-formula-de-compton-definicao\/\" aria-label=\"More on O que \u00e9 a f\u00f3rmula de Compton &#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 f\u00f3rmula de Compton - defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A f\u00f3rmula de Compton foi publicada em 1923 na Physical Review. 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