Improved measurement of the 02+→01+ E0 transition strength for Se 72 using the SPICE spectrometer

Abstract

The selenium isotopes lie at the heart of a tumultuous region of the nuclear chart where shape coexistence effects grapple with neutron-proton pairing correlations, triaxiality, and the impending proton drip line. In this work, a study of Se72 by internal conversion electron and γ-ray spectroscopy was undertaken with the SPICE and TIGRESS arrays. New measurements of the branching ratio and lifetime of the 02+ state were performed, yielding a determination of ρ2(E0;02+→01+)=29(3) milliunits. Two-state mixing calculations were performed that highlighted the importance of interpretation of such E0 strength values in the context of shape coexistence.

Metadata

Authors/Creators:

Smallcombe, J.
Garnsworthy, A. B.
Korten, W.
Singh, P.
Ali, F. A.
Andreoiu, C.
Ansari, S.
Ball, G. C.
Barton, C. J. https://orcid.org/0000-0001-5125-9619
Bhattacharjee, S. S.
Bowry, M.
Caballero-Folch, R.
Chester, A.
Gillespie, S. A. (sg581@york.ac.uk)
Grinyer, G. F.
Hackman, G.
Jones, C. (cej103@york.ac.uk)
Melon, B.
Moukaddam, M.
Nannini, A.
Ruotsalainen, P.
Starosta, K.
Svensson, C. E.
Wadsworth, R. https://orcid.org/0000-0002-4187-3102
Williams, J. (jw1945@york.ac.uk)

Dates:

Accepted: 12 July 2022
Published: 19 July 2022

Institution:

The University of York

Academic Units:

The University of York > Faculty of Sciences (York) > Physics (York)
The University of York > Faculty of Sciences (York) > Chemistry (York)
The University of York > Faculty of Sciences (York) > Electronic Engineering (York)

Funding Information:

Funder	Grant number
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)	ST/P003885/1
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)	ST/L005727/1
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)	ST/V001035/1

Depositing User:

Pure (York)

Date Deposited:

09 Sep 2022 12:00

Last Modified:

04 Feb 2024 01:19

Published Version:

https://doi.org/10.1103/PhysRevC.106.014312

Status:

Published

Refereed:

Yes