Shape coexistence and high-K states in 74Se populated following the β decay of 74Br
Journal article, 2013
Excited states in 74Se were populated following the ε/β + decay of 74Br, mainly from the J=K=4, 13.8-keV β-decaying isomer. Off-beam γ-ray spectroscopy was performed with the array of Clover HPGe detectors at WNSL Yale. Many new transitions were observed and rigorous spin assignments were made based on γ-γ angular correlations. The β-decay strength was found to proceed almost entirely to a few high-lying states near 4500 keV, which are consistent with deformed two-quasineutron high-K configurations. These doorway states then provide an effective tool for populating and identifying the lower prolate structures. Once categorized, the low-lying states of 74Se can be described as a set of near-spherical vibrational levels mixing strongly with a spectrum of prolate states which have an unperturbed bandhead near 1350 keV. © 2013 American Physical Society.
Author
E.A. McCutchan
Brookhaven National Laboratory
Argonne National Laboratory
C.J. Lister
University of Massachusetts Lowell
Argonne National Laboratory
T. Ahn
Yale University
V. Anagnostatou
University of Surrey
Yale University
N.G. Cooper
Yale University
M. Elvers
University of Surrey
University of Cologne
P. Goddard
University of Surrey
Yale University
Andreas Martin Heinz
Yale University
G. Ilie
Yale University
Institut de Physique des Materiaux, Bucarest-Magurele
D. Radeck
University of Cologne
Yale University
D. Savran
Yale University
Helmholtz
V. Werner
Yale University
Physical Review C - Nuclear Physics
24699985 (ISSN) 24699993 (eISSN)
Vol. 87 1Subject Categories
Subatomic Physics
Roots
Basic sciences
DOI
10.1103/PhysRevC.87.014307