Total absorption gamma-ray spectroscopy study of the beta-decay of Hg-186

Algora A., GANİOĞLU NUTKU E., Sarriguren P., Guadilla V., Fraile L., Nácher E., ...More

PHYSICS LETTERS B, vol.819, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 819
  • Publication Date: 2021
  • Doi Number: 10.1016/j.physletb.2021.136438
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, INSPEC, zbMATH, Directory of Open Access Journals
  • Keywords: Betadecay, Totalabsorption spectroscopy, Shape coexistence, CHARGE RADII, NUCLEAR, COEXISTENCE, MOMENTS, HG, TRANSITION, SHAPES, AU-186
  • Istanbul University Affiliated: Yes

Abstract

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.