Shape coexistence and high-K states in 74Se populated following the β decay of 74Br
Artikel i vetenskaplig tidskrift, 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.

Författare

E.A. McCutchan

C.J. Lister

T. Ahn

V. Anagnostatou

N.G. Cooper

M. Elvers

P. Goddard

Andreas Martin Heinz

Chalmers, Teknisk fysik, Subatomär fysik

G. Ilie

D. Radeck

D. Savran

V. Werner

Physical Review C - Nuclear Physics

0556-2813 (ISSN) 1089-490X (eISSN)

Vol. 87

Ämneskategorier

Subatomär fysik

Fundament

Grundläggande vetenskaper

DOI

10.1103/PhysRevC.87.014307