{"id":69758,"date":"2018-03-09T23:14:14","date_gmt":"2018-03-09T23:14:14","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/a-journey-of-ultra-heavy-cosmic-ray-nuclei-vith-z-mayor-65-from-their-detection-at-the-earth-neightbourhood-back-to-their-nucleosynthesis-sites\/"},"modified":"2018-03-09T23:14:14","modified_gmt":"2018-03-09T23:14:14","slug":"a-journey-of-ultra-heavy-cosmic-ray-nuclei-vith-z-mayor-65-from-their-detection-at-the-earth-neightbourhood-back-to-their-nucleosynthesis-sites","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/a-journey-of-ultra-heavy-cosmic-ray-nuclei-vith-z-mayor-65-from-their-detection-at-the-earth-neightbourhood-back-to-their-nucleosynthesis-sites\/","title":{"rendered":"A journey of ultra heavy cosmic ray nuclei vith z mayor 65: from their detection at the earth neightbourhood back to their nucleosynthesis sites."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Joan Font Serra <\/strong><\/h2>\n<p>El experimento ultra heavy cosmic ray experiment (uhcre) fue montado a bordo del sat\u00e9lite long duration exposure facility (ldef) y tuvo como principal objetivo la detecci\u00f3n y posterior identificaci\u00f3n de rayos c\u00f3smicos ultrapesados con carga superior a 65 y energ\u00eda por nucle\u00f3n superior a los 3 gev\/n con una buena estad\u00edstica, mediante detectores s\u00f3lidos de trazas nucleares. parte de los detectores del uhcre han sido analizados en el grupo de f\u00edsica de les radiacions de la universitat aut\u00f3noma de barcelona permitiendo localizar y medir un total de 205 trazas originadas por iones c\u00f3smicos.  en los dos primeros cap\u00edtulos de la presente tesis se trata la identificaci\u00f3n de estos n\u00facleos pertenecientes a la radiaci\u00f3n c\u00f3smica usando un modelo de formaci\u00f3n de trazas latentes basado en la p\u00e9rdida de energ\u00eda restringida (rel) y un m\u00e9todo de identificaci\u00f3n basado en el gradiente fraccial de la velocidad reducida que ataque, lo que nos permite asignar una carga a cada una de las trazas medidas en los apilamientos de detectores del uhcre. Asimismo, se propone un nuevo modelo de formaci\u00f3n de traza latente basado en una modificaci\u00f3n del rel seg\u00fan el cual, se considera la posible contribuci\u00f3n de las colisiones cercanas a la formaci\u00f3n de la traza latente mediante la introducci\u00f3n de un nuevo par\u00e1metro. Usando datos experimentales del uhcre y de exposiciones en acelerador se ha posido estimar el valor de dicho par\u00e1metro.  por otra parte, en los dos \u00faltimos cap\u00edtulos se estudia la propagaci\u00f3n de estos n\u00facleos c\u00f3smicos a trav\u00e9s de la galaxia desde las regiones cercanas a la tierra, donde se han detectado, hacia atr\u00e1s hasta sus fuentes donde fueron sintetizados. Para ello, se ha usado un modelo de leaky box que consiste en una simplificaci\u00f3n del modelo de difusi\u00f3n y que se trata del modelo m\u00e1s usado en c\u00e1lculos de propagaci\u00f3n. Inicialmente las ecuaciones de transporte correspondientes al modelo de leaky box son resueltas<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>A journey of ultra heavy cosmic ray nuclei vith z mayor 65: from their detection at the earth neightbourhood back to their nucleosynthesis sites.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 A journey of ultra heavy cosmic ray nuclei vith z mayor 65: from their detection at the earth neightbourhood back to their nucleosynthesis sites. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Joan Font Serra <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 28\/07\/2004<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Carles Domingo Miralles<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Francisco Fern\u00e1ndez moreno <\/li>\n<li>jordi Isern vilaboy (vocal)<\/li>\n<li>M\u00aa dolores Rodr\u00edguez fr\u00edas (vocal)<\/li>\n<li>merc\u00e9 Ginjaume ejido (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Joan Font Serra El experimento ultra heavy cosmic ray experiment (uhcre) fue montado a bordo del sat\u00e9lite [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[130901,7103,152596,33969,152597,7331],"class_list":["post-69758","post","type-post","status-publish","format-standard","hentry","category-sin-categoria","tag-carles-domingo-miralles","tag-francisco-fernandez-moreno","tag-joan-font-serra","tag-jordi-isern-vilaboy","tag-merce-ginjaume-ejido","tag-ma-dolores-rodriguez-frias"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/69758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=69758"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/69758\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=69758"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=69758"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=69758"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}