Physics & Astronomy Faculty Work

Title

K-Hindered Decay of a Six-Quasiparticle Isomer in 176Hf

Document Type

Article

Publication Date

2010

Publication Title

Physical Review C

Volume Number

82

Issue Number

5

DOI

10.1103/PhysRevC.82.054316

Abstract

The structure and decay properties of high-K isomers in 176Hf have been studied using beam sweeping techniques and the Gammasphere multidetector array. A new ΔK=8 decay branch, from a Kπ=22−, six-quasiparticle, someric (t1/2=43μs) state at 4864 keV to the 20− state of a Kπ=14−band, has been identified. The reduced hindrance factor per degree of K forbiddenness for this decay is measured to be unusually low (fν=3.2), which suggests K mixing in the states involved. The deduced interaction matrix elements are discussed within the context of relevant K-mixing scenarios. The 3266-keV state, previously interpreted as a Kπ=16+ intrinsic state, is reassigned as the Jπ=16+ member of the band based on the Kπ=15+ state at 3080 keV. The systematics of fνvalues as a function of the degree of forbiddenness is discussed in light of this change.

Comments

Additional authors: M.P. Carpenter, A. Heinz, R.V.F. Janssens, T.L. Khoo, T. Lauritsen, C.J. Lister, D. Seweryniak, I. Wiedenoever, D.M. Cullen, C. Wheldon, D.L. Balabanski, M. Danchev, T.M. Goon, D.J. Hartley, L.L. Riedinger, O. Zeidan, M.A. Riley, G. Sletten

ISSN

0556-2813

First Page

54316

Last Page

54321

Link Out URL

https://doi.org/10.1103/PhysRevC.82.054316

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