{"id":34487,"date":"2023-11-03T16:15:25","date_gmt":"2023-11-03T15:15:25","guid":{"rendered":"https:\/\/karmaka.de\/?p=34487"},"modified":"2023-11-03T16:15:26","modified_gmt":"2023-11-03T15:15:26","slug":"half-life-of-the-nuclear-cosmochronometer-176lu-measured-with-a-windowless-4%cf%80-solid-angle-scintillation-detector","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=34487","title":{"rendered":"Half-life of the nuclear cosmochronometer 176Lu measured with a windowless 4\u03c0 solid angle scintillation detector<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Takehito Hayakawa, Toshiyuki Shizuma &amp; Tsuyoshi Iizuka<\/p>\n\n\n\n<p>Communications Physics, Volume 6, Article number: 299<br>Published: 03 November 2023<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s42005-023-01406-7\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.nature.com\/articles\/s42005-023-01406-7.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The 176Lu-176Hf nuclear decay is a powerful tool to measure the age of astrophysical and geological events and has been used as a \u201ccosmochronometer\u201d. However, the half-life values of 176Lu measured with various experiments differ significantly. Furthermore, the half-life values evaluated from Lu-Hf isochrons in meteorites and terrestrial rocks with known ages show two different values. Here we report half-life measurements using a method that is almost independent of various uncertainties. To the best of our knowledge this is the most accurate value of 176Lu half-life. We measure the total energy released from 176Lu decay using a windowless 4\u03c0 solid angle detector based upon bismuth germanate (BGO) scintillation crystals, where a natural Lu sample is located inside of the detector. The measured half-life of (3.719\u2009\u00b1\u20090.007)\u2009\u00d7\u20091010 yr corresponding to a decay constant of (1.864\u2009\u00b1\u20090.003)\u2009\u00d7\u200910\u221211 yr\u22121 is consistent with that obtained from the analysis of terrestrial rocks within the uncertainty.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Takehito Hayakawa, Toshiyuki Shizuma &amp; Tsuyoshi Iizuka Communications Physics, Volume 6, Article number: 299Published: 03 November 2023 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;The 176Lu-176Hf nuclear decay is a powerful tool to measure the age of&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[1964,1848],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34487"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=34487"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34487\/revisions"}],"predecessor-version":[{"id":34488,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34487\/revisions\/34488"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=34487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=34487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=34487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}