Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe

Abstract

High-spin nuclear isomers in (Formula presented.) nuclei between doubly magic (Formula presented.) Ca and (Formula presented.) Ni provide an excellent testing ground for the nuclear shell model and questions related to isospin symmetry breaking in the vicinity of the proton drip line. The purpose of the present study is to investigate the possibility of weak electromagnetic decay branches along the decay paths of the 6526-keV (Formula presented.) isomer in (Formula presented.) Fe. The isomer was strongly populated by means of the fusion-evaporation reaction (Formula presented.) Mg((Formula presented.) Ar, (Formula presented.)) (Formula presented.) Fe. The Gammasphere array was used to detect (Formula presented.) -ray cascades emitted from the isomeric state. By means of (Formula presented.) coincidences, weak non-yrast decay branches can be discriminated, with the isomer’s half-life confirmed at (Formula presented.) ns. The yrast (Formula presented.) (Formula presented.) cross-over transition was interrogated. The observations are compared with shell-model calculations.

Metadata

Authors/Creators:	Böhm, Paul Hrabar, Yuliia Rudolph, Dirk Golubev, Pavel Sarmiento, Luis G. Albers, Helena M. Anderson, John T. Bentley, Michael A. https://orcid.org/0000-0001-8401-3455 Carpenter, Michael P. Chiara, Christopher J. Copp, Patrick A. Forsberg, Ulrika Huang, Tianheng Jayatissa, Heshani Lauritsen, Torben Müller-Gatermann, Claus Pereira-Lopez, Xesus Reviol, Walter Seweryniak, Darek Stolze, Sanna Uthayakumaar, Sivahami Wilson, Gemma L. (gw713@york.ac.uk) Wu, Jin
Copyright, Publisher and Additional Information:	Funding Information: This research was funded in part by the Swedish Research Council (Vetenskapsrådet, VR 2016-3969 and VR 2022-3828), the Crafoord Foundation in Lund (Grant 20180630), the U.S. Department of Energy, Office of Science, Office of Nuclear Physics (Contract No. DE-AC02-06CH11357), and the UKRI Science and Technology Facilities Council under grant numbers ST/P003885/1 and ST/V001035/1. Funding Information: We would like to thank the ATLAS accelerator crew for their supreme efforts. This research used resources of ANL’s ATLAS facility, which is a U.S. Department of Energy Office of Science User Facility. The isotope(s) used in this research were supplied by the U.S. Department of Energy Office of Science by the Isotope Program in the Office of Nuclear Physics. Publisher Copyright: © 2023 by the authors.
Keywords:	electromagnetic transitions, nuclear isomer, nuclear shell model
Dates:	Accepted: 22 August 2023 Published: 24 August 2023
Institution:	The University of York
Academic Units:	The University of York > Faculty of Arts and Humanities (York) > History (York) The University of York > Faculty of Sciences (York) > Physics (York)
Depositing User:	Pure (York)
Date Deposited:	15 Nov 2023 12:30
Last Modified:	04 Feb 2024 01:25
Published Version:	https://doi.org/10.3390/atoms11090116
Status:	Published
Refereed:	Yes
Identification Number:	https://doi.org/10.3390/atoms11090116
Related URLs:	http://www.scopus.com/inward/record.url?...

Download

Published Version

Filename: atoms_11_00116_v2.pdf

Description: Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe

Licence: CC-BY 2.5

CLICK TO DOWNLOAD

CORE (COnnecting REpositories)

Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe

Abstract

Metadata

Download

Published Version

Export

Statistics