{"id":1229,"date":"2020-07-29T09:50:06","date_gmt":"2020-07-29T09:50:06","guid":{"rendered":"https:\/\/budker.uni-mainz.de\/?p=1229"},"modified":"2020-07-29T10:51:22","modified_gmt":"2020-07-29T10:51:22","slug":"detection-of-low-lying-atomic-states-in-actinium","status":"publish","type":"post","link":"https:\/\/budker.uni-mainz.de\/?p=1229","title":{"rendered":"Detection of low-lying atomic states in actinium"},"content":{"rendered":"\n

Two lowest-energy odd-parity atomic levels of the radioactive element actinium were observed in a laser-spectroscopy experiment at the Johannes Gutenberg University in Mainz, Germany, resolving a long-standing puzzle of \u201cmissing\u201d atomic states predicted by theory. <\/p>\n\n\n\n

The properties of these states (exact energies, lifetime, and hyperfine structure) were studied by the experimental team and found to be in agreement with atomic-structure calculations carried out by the theory members of the collaboration (including researchers from Germany, China, USA,  and Russia).<\/p>\n\n\n\n

The results of the work will help in understanding the complex atomic spectra of actinide atoms and may enable developing efficient laser-cooling and ionization schemes for actinium, with possible applications for high-purity medical-isotope production and future fundamental physics experiments.<\/p>\n\n\n\n

The experimental team included the members of the group of Prof. Dr. Klaus Wendt of JGU QUANTUM and our group.<\/p>\n\n\n\n

https:\/\/arxiv.org\/abs\/2005.03713<\/a><\/p>\n\n\n\n

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Spectrum of one of the newly observed transitions in actinium.<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

  • \"\"
    Actinium observed in Dmitry Budker’s house<\/figcaption><\/figure><\/li><\/ul><\/figure>\n","protected":false},"excerpt":{"rendered":"

    Two lowest-energy odd-parity atomic levels of the radioactive element actinium were observed in a laser-spectroscopy experiment at the Johannes Gutenberg University in Mainz, Germany, resolving a long-standing puzzle of \u201cmissing\u201d atomic states predicted by theory. The properties of these states (exact energies, lifetime, and hyperfine structure) were studied by the experimental team and found to […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1],"tags":[],"class_list":["post-1229","post","type-post","status-publish","format-standard","hentry","category-default"],"_links":{"self":[{"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/posts\/1229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1229"}],"version-history":[{"count":6,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/posts\/1229\/revisions"}],"predecessor-version":[{"id":1239,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=\/wp\/v2\/posts\/1229\/revisions\/1239"}],"wp:attachment":[{"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/budker.uni-mainz.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}