Experimental apparatus at KUR-ISOL to identify isomeric transitions from fission products, and decay spectroscopy of ¹⁵¹Ce

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• 作者：Y. Kojima ; M. Shibata ; A. Taniguchi ; Y. Kawase ; R. Doi ; A. Nagao and K. Shizuma
• 关键词：Radioactivity ¹⁵¹Ce [from ] ; yle="text-decoration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJM-4K3CY3J-B&_mathId=mml31&_user=10&_cdi=5314&_rdoc=36&_handle=V-WA-A-W-YC-MsSAYVA-UUA
• 刊名：Nuclear Instruments and Methods in Physics Research Section A ; Accelerators ; Spectrometers ; Detectors and Associated Equipment
• 出版年：2006
• 期刊代码：41_01689002
• 类别：ph
• 出版时间：1 August 2006
• 卷：564
• 期：1
• 页码：275-282
• 文件大小：246 K

摘要

Decay studies on ¹⁵¹Ce have been performed using the on-line isotope separator connected to the Kyoto University Reactor. In addition to conventional yle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJM-4K3CY3J-B&_mathId=mml27&_user=10&_cdi=5314&_rdoc=36&_handle=V-WA-A-W-YC-MsSAYVA-UUA-U-AAZCBUBVCB-AAZWYYVWCB-VBBWBBWA-YC-U&_acct=C000050221&_version=1&_userid=10&md5=d672d7925f26abb0e6bd1ce2b1ccdbb7" title="Click to view the MathML source">γ and conversion electron spectroscopy, yle="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TJM-4K3CY3J-B&_mathId=mml28&_user=10&_cdi=5314&_rdoc=36&_handle=V-WA-A-W-YC-MsSAYVA-UUA-U-AAZCBUBVCB-AAZWYYVWCB-VBBWBBWA-YC-U&_acct=C000050221&_version=1&_userid=10&md5=d6c149e1a8e9d7b5e6cb40a14080bf79" title="Click to view the MathML source">β-gated measurements were carried out on mass-separated ¹⁵¹Ce to identify an isomeric transition. From the analysis of the obtained data, the half-life of the isotope was ascertained to be 1.76(6) s and a decay scheme containing six excited levels was constructed for the first time. The excited level at 35.1 keV in ¹⁵¹Pr was found to be a long-lived state (a half-life of approximately or longer).