{"id":3281,"date":"2015-06-27T19:02:52","date_gmt":"2015-06-27T19:02:52","guid":{"rendered":"http:\/\/quiprocura.net\/w\/?post_type=portfolio&#038;p=3281"},"modified":"2016-02-05T19:42:07","modified_gmt":"2016-02-05T22:42:07","slug":"reacoes-nucleares","status":"publish","type":"portfolio","link":"https:\/\/quiprocura.net\/w\/portfolio-item\/reacoes-nucleares\/","title":{"rendered":"Rea\u00e7\u00f5es Nucleares"},"content":{"rendered":"<div  class='avia-builder-widget-area clearfix  avia-builder-el-0  el_before_av_image  avia-builder-el-first '><div id=\"text-35\" class=\"widget clearfix widget_text\">\t\t\t<div class=\"textwidget\"><h3>QuiProcura Qu\u00edmica<\/h3>\n<p><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-5517334625230773\"\n     crossorigin=\"anonymous\"><\/script><br \/>\n<!-- anuncio superior --><br \/>\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:728px;height:90px\"\n     data-ad-client=\"ca-pub-5517334625230773\"\n     data-ad-slot=\"3817602043\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<\/div>\n\t\t<\/div><\/div>\n<div  class='avia-image-container  av-styling-    avia-builder-el-1  el_after_av_sidebar  el_before_av_two_third  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img class='wp-image-3286 avia-img-lazy-loading-not-3286 avia_image' src='https:\/\/quiprocura.net\/w\/wp-content\/uploads\/2015\/06\/desintegracao1-800x321.png' alt='' title='desintegracao' height=\"321\" width=\"800\"  itemprop=\"thumbnailUrl\"  \/><\/div><\/div><\/div>\n<div class=\"flex_column av_two_third  flex_column_div av-zero-column-padding first  avia-builder-el-2  el_after_av_image  el_before_av_one_third  \" style='border-radius:0px; '><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><h1>Rea\u00e7\u00e3o Nuclear<\/h1>\n<p>A emiss\u00e3o natural de uma part\u00edcula, por um <strong>n\u00facleo at\u00f4mico inst\u00e1vel<\/strong>, seja ela, <strong>alfa<\/strong>, <strong>beta<\/strong>, <strong>n\u00eautron<\/strong>, <strong>pr\u00f3ton<\/strong>, etc, transforma o <strong>n\u00facleo<\/strong> de um determinado elemento qu\u00edmico em um novo n\u00facleo que corresponde \u00e0 um outro elemento qu\u00edmico. Assim , cada uma dessas <strong>desintegra\u00e7\u00f5es radioativas<\/strong> representa a transmuta\u00e7\u00e3o de um elemento em outro. <i>(Transmuta\u00e7\u00e3o tamb\u00e9m pode ser efetuada artificialmente).<\/i><\/p>\n<h2><strong>Transmuta\u00e7\u00e3o<\/strong><\/h2>\n<p>Em 1919, <strong>Rutherford<\/strong> bombardeou nitrog\u00eanio-14 com part\u00edculas alfa obtidas da <strong>desintegra\u00e7\u00e3o radioativa<\/strong> do r\u00e1dio. O resultado dessa experi\u00eancia foi a obten\u00e7\u00e3o de um novo nucl\u00eddeo (esp\u00e9cie constitu\u00edda de um n\u00ba definido de pr\u00f3tons e de n\u00eautrons, em seu n\u00facleo at\u00f4mico) e de \u00e1tomos de hidrog\u00eanio. Posteriormente, outro cientista, Blackett, demonstrou que o nucl\u00eddeo era o oxig\u00eanio-17.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.quiprocura.net\/Image1.jpg\" alt=\"\" width=\"296\" height=\"45\" \/><\/p>\n<p><strong>Part\u00edcula alfa<\/strong>(<span style=\"font-family: Symbol;\">\u00b5<\/span> ) ou n\u00facleo de \u00e1tomo de h\u00e9lio \u00e9 o mesmo, da\u00ed o uso do h\u00e9lio no lugar da part\u00edcula alfa.<\/p>\n<p>Nessa rea\u00e7\u00e3o existe um <strong>nucl\u00eddeo<\/strong> intermedi\u00e1rio inst\u00e1vel, que \u00e9 um n\u00facleo de fl\u00faor inst\u00e1vel que se desintegra com uma meia-vida de menos de 10<sup>-12<\/sup> s e sua desintegra\u00e7\u00e3o ocorre por <strong>emiss\u00e3o<\/strong> de um <strong>pr\u00f3ton<\/strong>, dando origem ao oxig\u00eanio-17 est\u00e1vel e o pr\u00f3ton da rea\u00e7\u00e3o anterior.<\/p>\n<p>Em muitos casos, o produto de uma rea\u00e7\u00e3o de <strong>bombardeio nuclear<\/strong> \u00e9 inst\u00e1vel e produz subsequente desintegra\u00e7\u00e3o radioativa. Por exemplo, quando o n\u00facleo de cobalto 59 \u00e9 bombardeado com um n\u00eautron de alta energia, \u00e9 formado <strong>cobalto 60<\/strong> que \u00e9 pouco est\u00e1vel, sendo esse transformado em mangan\u00eas 56 mais He. Por\u00e9m, o mangan\u00eas 56 produzido n\u00e3o \u00e9 est\u00e1vel, desintegrando-se com uma meia-vida de 2,6 h e formando-se o ferro 56, que \u00e9 est\u00e1vel.<\/p>\n<p>Esse \u00e9 um exemplo de <strong>radioatividade induzida<\/strong> ou <strong>artificial<\/strong>.<\/p>\n<\/div><\/section><\/div><div class=\"flex_column av_one_third  flex_column_div av-zero-column-padding   avia-builder-el-4  el_after_av_two_third  avia-builder-el-last  \" style='border-radius:0px; '><p><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock  '   itemprop=\"text\" ><p><b>Escrito por:<\/b> Miguel A. Medeiros<br \/>\n<b>Revisado\u00a0em:<\/b> 29 de junho de 2015<\/p>\n<\/div><\/section><br \/>\n<\/p><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":3286,"comment_status":"closed","ping_status":"open","template":"","tags":[55,56,67,69,68,57,66,54,474],"portfolio_entries":[48],"class_list":["post-3281","portfolio","type-portfolio","status-publish","has-post-thumbnail","hentry","tag-alfa","tag-beta","tag-cadeia","tag-desintegracao","tag-domino","tag-gama","tag-nucleo","tag-particula","tag-transmutacao","portfolio_entries-noticias"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Rea\u00e7\u00f5es Nucleares - QuiProcura<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/quiprocura.net\/w\/portfolio-item\/reacoes-nucleares\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rea\u00e7\u00f5es Nucleares - 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