K-hindered decay of a six-quasiparticle isomer in 176Hf

G. Mukherjee; P. Chowdhury; F.G. Kondev; Geirr Sletten

doi:10.1103/PhysRevC.82.054316

K-hindered decay of a six-quasiparticle isomer in ¹⁷⁶Hf

G. Mukherjee, P. Chowdhury, F.G. Kondev, Geirr Sletten

Experimental Particle Physics

7 Citations (Scopus)

Abstract

The structure and decay properties of high-K isomers in Hf₁₇₆ have been studied using beam sweeping techniques and the Gammasphere multidetector array. A new ΔK=8 decay branch, from a Kπ=22⊃-, six-quasiparticle, isomeric (t_1/2=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 (f_ν=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 f_ν values as a function of the degree of forbiddenness is discussed in light of this change.

Original language	English
Article number	054316
Journal	Physical Review C (Nuclear Physics)
Volume	82
Issue number	5
Number of pages	6
ISSN	0556-2813
DOIs	https://doi.org/10.1103/PhysRevC.82.054316
Publication status	Published - 29 Nov 2010

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title = "K-hindered decay of a six-quasiparticle isomer in 176Hf",

abstract = "The structure and decay properties of high-K isomers in Hf176 have been studied using beam sweeping techniques and the Gammasphere multidetector array. A new ΔK=8 decay branch, from a Kπ=22⊃-, six-quasiparticle, isomeric (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 fν values as a function of the degree of forbiddenness is discussed in light of this change.",

author = "G. Mukherjee and P. Chowdhury and F.G. Kondev and Geirr Sletten",

year = "2010",

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doi = "10.1103/PhysRevC.82.054316",

language = "English",

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T1 - K-hindered decay of a six-quasiparticle isomer in 176Hf

AU - Mukherjee, G.

AU - Chowdhury, P.

AU - Kondev, F.G.

AU - Sletten, Geirr

PY - 2010/11/29

Y1 - 2010/11/29

N2 - The structure and decay properties of high-K isomers in Hf176 have been studied using beam sweeping techniques and the Gammasphere multidetector array. A new ΔK=8 decay branch, from a Kπ=22⊃-, six-quasiparticle, isomeric (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 fν values as a function of the degree of forbiddenness is discussed in light of this change.

AB - The structure and decay properties of high-K isomers in Hf176 have been studied using beam sweeping techniques and the Gammasphere multidetector array. A new ΔK=8 decay branch, from a Kπ=22⊃-, six-quasiparticle, isomeric (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 fν values as a function of the degree of forbiddenness is discussed in light of this change.

U2 - 10.1103/PhysRevC.82.054316

DO - 10.1103/PhysRevC.82.054316

M3 - Journal article

SN - 2469-9985

VL - 82

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 054316

ER -

K-hindered decay of a six-quasiparticle isomer in 176Hf

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K-hindered decay of a six-quasiparticle isomer in ¹⁷⁶Hf