期刊
PHYSICS LETTERS B
卷 819, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2021.136438
关键词
Betadecay; Totalabsorption spectroscopy; Shape coexistence
资金
- Spanish Ministerio de Economia y Competitividad [FPA2011-24553, FPA2014-52823C2-1-P, FPA2017-83946-C2-1-P, FPA2017-87568-P]
- Ministerio de Ciencia e Innovacion [PID2019-104714GB-C21, RTI2018098868-B-100]
- program Severo Ochoa [SEV-2014-0398]
- ENSAR [262010]
- European Union [654002]
- CPAN Consolider-Ingenio 2010 Programme [CSD2007-00042]
- TUBITAK2219 Abroad Research Fellowship Programme
- Max-Planck-Partner group
- STFC (UK) council [ST/P005314/1]
- National Science Center, Poland [2019/35/D/ST2/02081]
- National Research, Development and Innovation Fund of Hungary under the K18 funding scheme [K 128729, NN128072]
- MCI/AEI/FEDER, UE (Spain) [PGC2018-093636-B-I00]
The Gamow-Teller strength distribution of the decay of Hg-186 into Au-186 has been determined for the first time, showing predominantly prolate components in both parent and daughter nuclei. The study also developed a new approach for analyzing X-ray gated total absorption spectra.
The Gamow-Teller strength distribution of the decay of Hg-186 into Au-186 has been determined for the first time using the total absorption gamma spectroscopy technique and has been compared with theoretical QRPA calculations using the SLy4 Skyrme force. The measured Gamow-Teller strength distribution and the half-life are described by mixing oblate and prolate configurations independently in the parent and daughter nuclei. In this theoretical framework the best description of the experimental beta strength is obtained with dominantly prolate components for both parent Hg-186 and daughter Au-186. The approach also allowed us to determine an upper limit of the oblate component in the parent state. The complexity of the analysis required the development of a new approach in the analysis of the X-ray gated total absorption spectrum. (C) 2021 The Authors. Published by Elsevier B.V.
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