K-hindered decay of a six-quasiparticle isomer in Hf176

G. Mukherjee; P. Chowdhury; F. G. Kondev; P. M. Walker; G. D. Dracoulis; R. D'Alarcao; I. Shestakova; K. Abu Saleem; I. Ahmad; M. P. Carpenter; A. Heinz; R. V.F. Janssens; T. L. Khoo; T. Lauritsen; C. J. Lister; D. Seweryniak; I. Wiedenhoever; D. M. Cullen; C. Wheldon; D. L. Balabanski; M. Danchev; T. M. Goon; D. J. Hartley; L. L. Riedinger; O. Zeidan; M. A. Riley; R. A. Kaye; G. Sletten

doi:10.1103/PhysRevC.82.054316

K-hindered decay of a six-quasiparticle isomer in Hf₁₇₆

G. Mukherjee^*, P. Chowdhury, F. G. Kondev, P. M. Walker, G. D. Dracoulis, R. D'Alarcao, I. Shestakova, K. Abu Saleem, I. Ahmad, M. P. Carpenter, A. Heinz, R. V.F. Janssens, T. L. Khoo, T. Lauritsen, C. J. Lister, D. Seweryniak, I. Wiedenhoever, D. M. Cullen, C. Wheldon, D. L. BalabanskiM. Danchev, T. M. Goon, D. J. Hartley, L. L. Riedinger, O. Zeidan, M. A. Riley, R. A. Kaye, G. Sletten

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 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
DOIs	https://doi.org/10.1103/PhysRevC.82.054316
Publication status	Published - 29 Nov 2010

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Mukherjee, G., Chowdhury, P., Kondev, F. G., Walker, P. M., Dracoulis, G. D., D'Alarcao, R., Shestakova, I., Abu Saleem, K., Ahmad, I., Carpenter, M. P., Heinz, A., Janssens, R. V. F., Khoo, T. L., Lauritsen, T., Lister, C. J., Seweryniak, D., Wiedenhoever, I., Cullen, D. M., Wheldon, C., ... Sletten, G. (2010). K-hindered decay of a six-quasiparticle isomer in Hf₁₇₆. Physical Review C - Nuclear Physics, 82(5), Article 054316. https://doi.org/10.1103/PhysRevC.82.054316

@article{8017ab205eaa4446a4b81b44efe0d915,

title = "K-hindered decay of a six-quasiparticle isomer in Hf176",

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 Kondev, {F. G.} and Walker, {P. M.} and Dracoulis, {G. D.} and R. D'Alarcao and I. Shestakova and {Abu Saleem}, K. and I. Ahmad and Carpenter, {M. P.} and A. Heinz and Janssens, {R. V.F.} and Khoo, {T. L.} and T. Lauritsen and Lister, {C. J.} and D. Seweryniak and I. Wiedenhoever and Cullen, {D. M.} and C. Wheldon and Balabanski, {D. L.} and M. Danchev and Goon, {T. M.} and Hartley, {D. J.} and Riedinger, {L. L.} and O. Zeidan and Riley, {M. A.} and Kaye, {R. A.} and G. Sletten",

year = "2010",

month = nov,

day = "29",

doi = "10.1103/PhysRevC.82.054316",

language = "English",

volume = "82",

journal = "Physical Review C - Nuclear Physics",

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Mukherjee, G, Chowdhury, P, Kondev, FG, Walker, PM, Dracoulis, GD, D'Alarcao, R, Shestakova, I, Abu Saleem, K, Ahmad, I, Carpenter, MP, Heinz, A, Janssens, RVF, Khoo, TL, Lauritsen, T, Lister, CJ, Seweryniak, D, Wiedenhoever, I, Cullen, DM, Wheldon, C, Balabanski, DL, Danchev, M, Goon, TM, Hartley, DJ, Riedinger, LL, Zeidan, O, Riley, MA, Kaye, RA & Sletten, G 2010, 'K-hindered decay of a six-quasiparticle isomer in Hf₁₇₆', Physical Review C - Nuclear Physics, vol. 82, no. 5, 054316. https://doi.org/10.1103/PhysRevC.82.054316

TY - JOUR

T1 - K-hindered decay of a six-quasiparticle isomer in Hf176

AU - Mukherjee, G.

AU - Chowdhury, P.

AU - Kondev, F. G.

AU - Walker, P. M.

AU - Dracoulis, G. D.

AU - D'Alarcao, R.

AU - Shestakova, I.

AU - Abu Saleem, K.

AU - Ahmad, I.

AU - Carpenter, M. P.

AU - Heinz, A.

AU - Janssens, R. V.F.

AU - Khoo, T. L.

AU - Lauritsen, T.

AU - Lister, C. J.

AU - Seweryniak, D.

AU - Wiedenhoever, I.

AU - Cullen, D. M.

AU - Wheldon, C.

AU - Balabanski, D. L.

AU - Danchev, M.

AU - Goon, T. M.

AU - Hartley, D. J.

AU - Riedinger, L. L.

AU - Zeidan, O.

AU - Riley, M. A.

AU - Kaye, R. A.

AU - Sletten, G.

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.

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U2 - 10.1103/PhysRevC.82.054316

DO - 10.1103/PhysRevC.82.054316

M3 - Article

SN - 0556-2813

VL - 82

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 5

M1 - 054316

ER -

K-hindered decay of a six-quasiparticle isomer in Hf₁₇₆

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