{"id":34509,"date":"1998-01-01T00:00:00","date_gmt":"1998-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/auto-atrapamiento-del-positron-y-estados-ligados-eh-en-cristales-ionicos\/"},"modified":"1998-01-01T00:00:00","modified_gmt":"1998-01-01T00:00:00","slug":"auto-atrapamiento-del-positron-y-estados-ligados-eh-en-cristales-ionicos","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/auto-atrapamiento-del-positron-y-estados-ligados-eh-en-cristales-ionicos\/","title":{"rendered":"Auto-atrapamiento del positron y estados ligados (e+,h-) en cristales ionicos."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Monge Alcazar Miguel Angel <\/strong><\/h2>\n<p>La presente tesis investiga la din\u00e1mica del positr\u00f3n en materiales i\u00f3nicos y la formaci\u00f3n de estados ligados (e+-h-). La investigaci\u00f3n se realiz\u00f3 en cristales de \u00f3xidos alcalinot\u00e9rreos (mgo y cao), y en el haluro alcalino lif. Se utilizaron cristales puros y conteniendo hidr\u00f3geno, deuterio o litio. La investigaci\u00f3n se llev\u00f3 a cabo en cristales conteniendo distintos tipos de defectos, como centros f (vacantes ani\u00f3nicas), centros v (vacantes cationicas), e iones h- o d-. La t\u00e9cnica experimental usada ha sido aniquilaci\u00f3n de positrones, determin\u00e1ndose experimentalmente la vida del positr\u00f3n y el ensanchamiento doppler. Se propone un modelo de positr\u00f3n auto-atrapado que permite explicar el comportamiento del positr\u00f3n en \u00f3xidos alcalinot\u00e9rreos, y determinar la diferencia de energ\u00eda entre el estado auto-atrapado y libre. Asimismo se han determinado los coeficientes de atrapamiento tanto en centros v y f, como en iones h-. La formaci\u00f3n de estados ligados (eq-h-) y (e+-d-), hidruro y deuteruro de positronio respectivamente, ha quedado experimentalmente demostrada en la matriz de mgo, para el cual se ha determinado la velocidad de disociaci\u00f3n del estado ligado (e+-h-) en hidr\u00f3geno y positronio. El diferente comportamiento del positr\u00f3n en lif respecto al observado en los \u00f3xidos alcalinot\u00e9rreos se explica por el diferente comportamiento de los excitones en ambas redes cristalinas.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Auto-atrapamiento del positron y estados ligados (e+,h-) en cristales ionicos.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Auto-atrapamiento del positron y estados ligados (e+,h-) en cristales ionicos. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Monge Alcazar Miguel Angel <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1998<\/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>Ramiro Pareja Pareja<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Francisco Javier Piqueras De Noriega <\/li>\n<li>Jos\u00e9 Garcia Sole (vocal)<\/li>\n<li>Victor Orera Clemente (vocal)<\/li>\n<li>\u00e1ngel Ibarra S\u00e1nchez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Monge Alcazar Miguel Angel La presente tesis investiga la din\u00e1mica del positr\u00f3n en materiales i\u00f3nicos y la [&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 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