{"id":1105,"date":"2021-07-13T12:29:42","date_gmt":"2021-07-13T10:29:42","guid":{"rendered":"http:\/\/127.0.0.1\/?page_id=1105"},"modified":"2025-06-04T17:27:03","modified_gmt":"2025-06-04T15:27:03","slug":"structure-atomes-molecules-ions","status":"publish","type":"page","link":"http:\/\/www.lac.universite-paris-saclay.fr\/?page_id=1105","title":{"rendered":"OR 1 : Structure : atomes, mol\u00e9cules, ions"},"content":{"rendered":"<div  class=\"wp-block-ultimate-post-heading ultp-block-d3d715\"><div class=\"ultp-block-wrapper\"><div class=\"ultp-heading-wrap ultp-heading-style9 ultp-heading-center\"><h1 class=\"ultp-heading-inner\"><span>Structure : atomes, mol\u00e9cules, ions<\/span><\/h1><\/div><\/div><\/div>\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<div id=\"section-g-m1s3rif\" class=\"wp-block-gutentor-e1 section-g-m1s3rif gutentor-element gutentor-element-advanced-text text-align-justify-desktop text-align-justify-tablet text-align-justify-mobile\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Cette OR transverse s\u2019int\u00e9resse aux propri\u00e9t\u00e9s intrins\u00e8ques d\u2019atomes (alcalins, alcalino-terreux, lanthanides \u2026) et de mol\u00e9cules diatomiques\/triatomiques compos\u00e9es de diff\u00e9rentes combinaisons de ces atomes. Par des m\u00e9thodes de chimie quantique (codes d\u00e9velopp\u00e9s localement ou codes commerciaux), nous calculons la structure \u00e9lectronique, les courbes\/surfaces d&#8217;\u00e9nergie potentielle, les polarisabilit\u00e9s statiques et dynamiques, la structure fine\/hyperfine, les moments dipolaires \u00e9lectriques permanents et de transition de ces particules.<\/p><\/div><\/div>\n\n\n<div class=\"wp-block-ub-content-toggle wp-block-ub-content-toggle-block\" id=\"ub-content-toggle-block-d787c0fd-b08f-40fb-86cf-55d29fe49137\" data-mobilecollapse=\"false\" data-desktopcollapse=\"true\" data-preventcollapse=\"false\" data-showonlyone=\"false\">\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-0-d787c0fd-b08f-40fb-86cf-55d29fe49137\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-d787c0fd-b08f-40fb-86cf-55d29fe49137\" style=\"color: #000000; \">Structure \u00e9lectronique<\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-0-d787c0fd-b08f-40fb-86cf-55d29fe49137\">\n\n<div id=\"section-g-811m5tp\" class=\"wp-block-gutentor-e1 section-g-811m5tp gutentor-element gutentor-element-advanced-text\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Strcuture \u00e9lectronique<\/p><\/div><\/div>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-1-d787c0fd-b08f-40fb-86cf-55d29fe49137\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-d787c0fd-b08f-40fb-86cf-55d29fe49137\" style=\"color: #000000; \">Courbes d&#8217;\u00e9nergie potentielle<\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-1-d787c0fd-b08f-40fb-86cf-55d29fe49137\">\n\n<div id=\"section-g-7sukbkh\" class=\"wp-block-gutentor-e1 section-g-7sukbkh gutentor-element gutentor-element-advanced-text text-align-justify-desktop text-align-justify-tablet text-align-justify-mobile\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Le 2\u00e8me volet consiste \u00e0 progresser dans l\u2019\u00e9tude des mol\u00e9cules constitu\u00e9es d\u2019un atome alcalin (A) et d\u2019un atome lanthanides (La) qui poss\u00e8dent un moment dipolaire \u00e9lectrique et magn\u00e9tique. L\u2019objectif central \u00e0 long terme de cette \u00e9tude est la d\u00e9termination des moyens de cr\u00e9er de telles mol\u00e9cules dans le r\u00e9gime ultra\u2010froid, afin d\u2019\u00e9tablir des bases pour le d\u00e9veloppement d\u2019une nouvelle plate\u2010forme potentielle pour la simulation quantique, en tant que pierre angulaire d\u2019un syst\u00e8me quantique fortement corr\u00e9l\u00e9 o\u00f9 des dimensions synth\u00e9tiques pourraient \u00eatre mises en oeuvre.<\/p><\/div><\/div>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-2-d787c0fd-b08f-40fb-86cf-55d29fe49137\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-d787c0fd-b08f-40fb-86cf-55d29fe49137\" style=\"color: #000000; \">Surface d&#8217;\u00e9nergie potentielle<\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-2-d787c0fd-b08f-40fb-86cf-55d29fe49137\">\n\n<div id=\"section-g-27q4hy5\" class=\"wp-block-gutentor-e1 section-g-27q4hy5 gutentor-element gutentor-element-advanced-text text-align-justify-desktop text-align-justify-tablet text-align-justify-mobile\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">La compr\u00e9hension compl\u00e8te des collisions in\u00e9lastiques entre les mol\u00e9cules polaires ultra\u2010froides responsables de la dur\u00e9e de vie limit\u00e9e des \u00e9chantillons de ces mol\u00e9cules n\u00e9cessite de cerner le r\u00f4le et les caract\u00e9ristiques du complexe transitoire \u00e0 deux mol\u00e9cules (Na2Rb2)* form\u00e9 pendant la collision \u00e0 deux corps. Le succ\u00e8s de notre \u00e9tude ouvrira la porte au contr\u00f4le de r\u00e9actions chimiques ultra\u2010froides et \u00e0 la formation d\u2019agr\u00e9gats ultra\u2010froids. Cette \u00e9tude constituera une partie de la th\u00e8se de Charbel Karam.<\/p><\/div><\/div>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-3-d787c0fd-b08f-40fb-86cf-55d29fe49137\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-d787c0fd-b08f-40fb-86cf-55d29fe49137\" style=\"color: #000000; \">Couplages fins et hyperfins<\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-3-d787c0fd-b08f-40fb-86cf-55d29fe49137\">\n\n<div id=\"section-g-p155rpg\" class=\"wp-block-gutentor-e1 section-g-p155rpg gutentor-element gutentor-element-advanced-text text-align-justify-desktop text-align-justify-tablet text-align-justify-mobile\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Le dernier volet concerne l\u2019obtention des termes de couplage spin\u2010orbite (SO) pour les ions mol\u00e9culaires alcalin\u2010alcalino\u2010terreux. La prise en compte de cette interaction est cruciale pour expliquer de nombreux processus observ\u00e9s exp\u00e9rimentalement en \u00e9tudiant l\u2019interaction entre un gaz d\u2019atome alcalin ultra\u2010froid et un ion alcalino\u2010terreux. L\u2019analyse fine des processus collisionnelles met en lumi\u00e8re plusieurs chemins de r\u00e9action possible comme l\u2019\u00e9change de charge ou l\u2019\u00e9change d\u2019excitation \u00e9lectronique. Dans de nombreux cas les mod\u00e8les th\u00e9oriques qui ne prennent pas en compte le couplage SO entre les \u00e9tats singlets et les \u00e9tats triplets ne peuvent expliquer les taux de r\u00e9action observ\u00e9s.<\/p><\/div><\/div>\n\n<\/div>\n\t\t<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\"><div  class=\"wp-block-ultimate-post-heading ultp-block-49476c\"><div class=\"ultp-block-wrapper\"><div class=\"ultp-heading-wrap ultp-heading-style1 ultp-heading-left\"><h2 class=\"ultp-heading-inner\"><span>Membres<\/span><\/h2><\/div><\/div><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li><b>R. VEXIAU<\/b><br><a href=\"mailto:goulven.quemener@universite-paris-saclay.fr\" target=\"_blank\" rel=\"noreferrer noopener\">romain.vexiau_at_cnrs.fr<\/a><br><br><\/li>\n\n\n\n<li style=\"font-size:16px\">N. BOULOUFA<br><a href=\"mailto:nadia.bouloufa@u-psud.fr\" target=\"_blank\" rel=\"noreferrer noopener\">nadia.bouloufa_at_universite-paris-saclay.fr<\/a><br><br><\/li>\n\n\n\n<li style=\"font-size:16px\">O. DULIEU<br><a href=\"mailto:olivier.dulieu@universite-paris-saclay.fr\" target=\"_blank\" rel=\"noreferrer noopener\">olivier.dulieu_at_universite-paris-saclay.fr<\/a><br><br><\/li>\n\n\n\n<li style=\"font-size:16px\">L. WIESENFELD<br><a href=\"mailto:romain.vexiau@universite-paris-saclay.fr\" target=\"_blank\" rel=\"noreferrer noopener\">laurent.wiesenfeld_at_universite-paris-saclay.fr<\/a><br><\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n<div style=\"gap: 20px;\" class=\"align-button-center ub-buttons orientation-button-row ub-flex-wrap wp-block-ub-button\" id=\"ub-button-3c3978ec-7cec-4bca-83c1-82115fe28f45\"><div class=\"ub-button-container\">\n\t\t\t<a href=\"?page_id=779\" target=\"_self\" rel=\"nofollow\" class=\"ub-button-block-main  \" role=\"button\" style=\"--ub-button-background-color: transparent; --ub-button-color: #7797b1; --ub-button-border: 3px solid #7797b1; --ub-button-hover-color: #2e5473; --ub-button-hover-border: 3px solid #2e5473; padding-top: 10px; padding-right: 10px; padding-bottom: 10px; padding-left: 10px; border-top-left-radius: 60px;; border-top-right-radius: 60px;; border-bottom-left-radius: 60px;; border-bottom-right-radius: 60px;; \">\n\t\t\t\t<div class=\"ub-button-content-holder\" style=\"flex-direction: row\">\n\t\t\t\t\t<span class=\"ub-button-block-btn\">Retour<\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/a>\n\t\t<\/div><\/div>\n\n\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp;<\/p>\n","protected":false},"author":1,"featured_media":2666,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1105","page","type-page","status-publish","has-post-thumbnail","hentry"],"featured_image_src":"http:\/\/www.lac.universite-paris-saclay.fr\/wp-content\/uploads\/2021\/08\/medium-1.png","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>OR 1 : Structure : atomes, mol\u00e9cules, ions - LAC<\/title>\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.lac.universite-paris-saclay.fr\/?page_id=1105\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"OR 1 : Structure : atomes, mol\u00e9cules, ions - LAC\" \/>\n<meta name=\"twitter:description\" content=\"&nbsp;\" \/>\n<meta name=\"twitter:image\" content=\"http:\/\/www.lac.universite-paris-saclay.fr\/wp-content\/uploads\/2021\/08\/medium-1.png\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"http:\/\/www.lac.universite-paris-saclay.fr\/?page_id=1105\",\"url\":\"http:\/\/www.lac.universite-paris-saclay.fr\/?page_id=1105\",\"name\":\"OR 1 : Structure : atomes, mol\u00e9cules, ions - 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