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

被引：11

作者：

Mukherjee, G. ^{[1
]}

Chowdhury, P. ^{[1
]}

Kondev, F. G. ^{[2
]}

Walker, P. M. ^{[3
]}

Dracoulis, G. D. ^{[4
]}

D'Alarcao, R. ^{[1
]}

Shestakova, I. ^{[1
]}

Abu Saleem, K. ^{[2
]}

Ahmad, I. ^{[2
]}

Carpenter, M. P. ^{[2
]}

Heinz, A. ^{[2
]}

Janssens, R. V. F. ^{[2
]}

Khoo, T. L. ^{[2
]}

Lauritsen, T. ^{[2
]}

Lister, C. J. ^{[2
]}

Seweryniak, D. ^{[2
]}

Wiedenhoever, I. ^{[2
]}

Cullen, D. M. ^{[5
]}

Wheldon, C. ^{[6
]}

Balabanski, D. L. ^{[7
]}

Danchev, M. ^{[7
]}

Goon, T. M. ^{[7
]}

Hartley, D. J. ^{[7
]}

Riedinger, L. L. ^{[7
]}

Zeidan, O. ^{[7
]}

Riley, M. A. ^{[8
]}

Kaye, R. A. ^{[9
]}

Sletten, G. ^{[10
]}

机构：

[1] Univ Massachusetts Lowell, Dept Phys, Lowell, MA 01854 USA

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

[4] Australian Natl Univ, Dept Nucl Phys, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia

[5] Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England

[6] Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England

[7] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[8] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[9] Purdue Univ Calumet, Dept Chem Phys, Hammond, IN 46323 USA

[10] Niels Bohr Inst, DK-2100 Copenhagen, Denmark

来源：

PHYSICAL REVIEW C | 2010年 / 82卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

FORBIDDEN TRANSITIONS; RESIDUAL INTERACTIONS; ROTATIONAL BANDS; STATES;

D O I：

10.1103/PhysRevC.82.054316

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The structure and decay properties of high-K isomers in Hf-176 have been studied using beam sweeping techniques and the Gammasphere multidetector array. A new Delta K = 8 decay branch, from a K-pi = 22(-), six-quasiparticle, isomeric (t(1/2) = 43 mu s) state at 4864 keV to the 20(-) state of a K-pi = 14(-) band, has been identified. The reduced hindrance factor per degree of K forbiddenness for this decay is measured to be unusually low (f(nu) = 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 K-pi = 16(+) intrinsic state, is reassigned as the J(pi) = 16(+) member of the band based on the K-pi = 15(+) state at 3080 keV. The systematics of f(nu) values as a function of the degree of forbiddenness is discussed in light of this change.

引用

页数：6

共 14 条

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