Configurations and decay hindrances of high- K states in Hf180

Tandel, S. K.; Chowdhury, P.; Kondev, F. G.; Janssens, R. V.  F.; Khoo, T. L.; Carpenter, M. P.; Lauritsen, T.; Lister, C. J.; Seweryniak, D.; Zhu, S.; Deacon, A.; Freeman, S. J.; Hammond, N. J.; Jones, G. D.; Moore, E. F.; Smith, J. F.

doi:10.1103/PhysRevC.94.064304

Title: Configurations and decay hindrances of high- $K$ states in ${}^{180}{Hf}$

Journal Article · Fri Dec 02 00:00:00 EST 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.94.064304· OSTI ID:1390818

Tandel, S. K. ^[1]; Chowdhury, P. ^[2]; Kondev, F. G. ^[3]; Janssens, R. V. F. ^[3]; Khoo, T. L. ^[3]; Carpenter, M. P. ^[3]; Lauritsen, T. ^[3]; Lister, C. J. ^[4]; Seweryniak, D. ^[3]; Zhu, S. ^[3]; Deacon, A. ^[5]; Freeman, S. J. ^[5]; Hammond, N. J. ^[3]; Jones, G. D. ^[6]; Moore, E. F. ^[3]; Smith, J. F. ^[5]

Univ. of Massachusetts, Lowell, MA (United States). Dept. of Physics; Univ. of Mumbai (India). Centre for Excellence in Basic Sciences (DAE)
Univ. of Massachusetts, Lowell, MA (United States). Dept. of Physics
Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Massachusetts, Lowell, MA (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Manchester (United Kingdom)
Univ. of Liverpool (United Kingdom)

Multi-quasiparticle high-K states, several of which are isomeric, were observed in Hf-180 with the Gammasphere array. We determined the lifetimes in the ns-μs range using centroid-shift and decay measurements within a mu s coincidence time window. The configurations of high-K states involve two and four quasiparticles, with states up to K^π = (18^-) established. High-K excitations are found to be progressively more favored with increasing excitation energy. The K quantum number is quite robust up to the highest spins observed, as evidenced by the large values of the reduced hindrance for isomeric decays. Furthermore, rotational bands built on three high-K states are identified, and the measured branching ratios in these sequences enable the assignment of underlying configurations. Multi-quasiparticle calculations using the Lipkin-Nogami approach for pairing, with blocking included, reproduce the observed high-K energies quite well.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357; FG02-94ER40848; FG02-94ER40834

OSTI ID:: 1390818

Alternate ID(s):: OSTI ID: 1334221

Journal Information:: Physical Review C, Vol. 94, Issue 6; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (29)

Resolution of the ${}^{179}{isomer}$ anomaly: Exposure of a Fermi-aligned s band Walker, P. M.; Dracoulis, G. D.; Byrne, A. P. Physical Review Letters, Vol. 67, Issue 4 https://doi.org/10.1103/PhysRevLett.67.433	journal	July 1991
Study of high-spin states in 181, 182Os Kutsarova, T.; Lieder, R. M.; Schnare, H. Nuclear Physics A, Vol. 587, Issue 1 https://doi.org/10.1016/0375-9474(94)00819-9	journal	May 1995
High- K isomers and rotational structures in ${}^{174}W$ Tandel, S. K.; Chowdhury, P.; Seabury, E. H. Physical Review C, Vol. 73, Issue 4 https://doi.org/10.1103/PhysRevC.73.044306	journal	April 2006
High- $K$ isomers in neutron-rich hafnium nuclei at and beyond the stability line D’Alarcao, R.; Chowdhury, P.; Seabury, E. H. Physical Review C, Vol. 59, Issue 3 https://doi.org/10.1103/PhysRevC.59.R1227	journal	March 1999
The generalized centroid shift method for lifetime measurements in heavy ion reactions Andrejtscheff, W.; Senba, M.; Tsoupas, N. Nuclear Instruments and Methods in Physics Research, Vol. 204, Issue 1 https://doi.org/10.1016/0167-5087(82)90087-4	journal	December 1982
Equilibrium deformations and excitation energies of single-quasiproton band heads of rare-earth nuclei Nazarewicz, W.; Riley, M. A.; Garrett, J. D. Nuclear Physics A, Vol. 512, Issue 1 https://doi.org/10.1016/0375-9474(90)90004-6	journal	May 1990
Rotational bands and particle-hole excitations at very high spin Bengtsson, Tord; Ragnarsson, Ingemar Nuclear Physics A, Vol. 436, Issue 1 https://doi.org/10.1016/0375-9474(85)90541-X	journal	March 1985
Evaluation of theoretical conversion coefficients using BrIcc Kibédi, T.; Burrows, T. W.; Trzhaskovskaya, M. B. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 589, Issue 2 https://doi.org/10.1016/j.nima.2008.02.051	journal	May 2008
Multi-quasiparticle states in the mass-180 region Jain, Kiran; Burglin, O.; Dracoulis, G. D. Nuclear Physics A, Vol. 591, Issue 1 https://doi.org/10.1016/0375-9474(95)00175-Z	journal	August 1995
Search for strongly deformed structures and observation of multiple nucleon alignments in ${}^{174}W$ Tandel, S. K.; Knox, A. J.; Parnell-Lampen, C. Physical Review C, Vol. 77, Issue 2 https://doi.org/10.1103/PhysRevC.77.024313	journal	February 2008
Configurations and hindered decays of $K$ isomers in deformed nuclei with $A > 100$ Kondev, F. G.; Dracoulis, G. D.; Kibédi, T. Atomic Data and Nuclear Data Tables, Vol. 103-104 https://doi.org/10.1016/j.adt.2015.01.001	journal	May 2015
The Radiations from Hafnium Burson, S. B.; Blair, K. W.; Keller, H. B. Physical Review, Vol. 83, Issue 1 https://doi.org/10.1103/PhysRev.83.62	journal	July 1951
Nuclear Ground-State Masses and Deformations Moller, P.; Nix, J. R.; Myers, W. D. Atomic Data and Nuclear Data Tables, Vol. 59, Issue 2, p. 185-381 https://doi.org/10.1006/adnd.1995.1002	journal	March 1995
Nuclear Data Sheets for A = 180 McCutchan, E. A. Nuclear Data Sheets, Vol. 126 https://doi.org/10.1016/j.nds.2015.05.002	journal	May 2015
Collective Oblate Rotation at High Spins in Neutron-Rich ${}^{180}{Hf}$ Tandel, U. S.; Tandel, S. K.; Chowdhury, P. Physical Review Letters, Vol. 101, Issue 18 https://doi.org/10.1103/PhysRevLett.101.182503	journal	October 2008
Intrinsic states and rotational bands in 176Ta and 178Ta Kondev, F. G.; Dracoulis, G. D.; Byrne, A. P. Nuclear Physics A, Vol. 632, Issue 4 https://doi.org/10.1016/S0375-9474(98)00010-4	journal	March 1998
Backbending in 180W: a t-band crossing Walker, P. M.; Yeung, K. C.; Dracoulis, G. D. Physics Letters B, Vol. 309, Issue 1-2 https://doi.org/10.1016/0370-2693(93)91496-A	journal	July 1993
K-forbidden transitions from multi-quasiparticle states Walker, P. M.; Cullen, D. M.; Purry, C. S. Physics Letters B, Vol. 408, Issue 1-4 https://doi.org/10.1016/S0370-2693(97)00819-8	journal	September 1997
Multi-quasiparticle and rotational structures in 179W: Fermi alignment, the ifK-selection rule and blocking Walker, P. M.; Dracoulis, G. D.; Byrne, A. P. Nuclear Physics A, Vol. 568, Issue 2 https://doi.org/10.1016/0375-9474(94)90209-7	journal	February 1994
CHICO, a heavy ion detector for Gammasphere Simon, M. W.; Cline, D.; Wu, C. Y. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 452, Issue 1-2 https://doi.org/10.1016/S0168-9002(00)00429-0	journal	September 2000
New Physics Opportunities at Gammasphere Janssens, Robert; Stephens, Frank Nuclear Physics News, Vol. 6, Issue 4 https://doi.org/10.1080/10506899609411095	journal	January 1996
Rotational and intrinsic states above the $K^{π} {= 25 / 2}^{-}, T_{1 / 2} = 25$ day isomer in $^{179} Hf$ Mullins, S. M.; Dracoulis, G. D.; Byrne, A. P. Physical Review C, Vol. 61, Issue 4 https://doi.org/10.1103/PhysRevC.61.044315	journal	March 2000
The Ame2012 atomic mass evaluation Wang, M.; Audi, G.; Wapstra, A. H. Chinese Physics C, Vol. 36, Issue 12 https://doi.org/10.1088/1674-1137/36/12/003	journal	December 2012
Multi-quasiparticle states in 179Ta and structural changes in the yrast line of the odd tantalum isotopes Kondev, F. G.; Dracoulis, G. D.; Byrne, A. P. Nuclear Physics A, Vol. 617, Issue 1 https://doi.org/10.1016/S0375-9474(97)00007-9	journal	April 1997
Collective rotation and vibration in neutron-rich ${}^{180, 182}{Hf}$ nuclei Ngijoi-Yogo, E.; Tandel, S. K.; Mukherjee, G. Physical Review C, Vol. 75, Issue 3 https://doi.org/10.1103/PhysRevC.75.034305	journal	March 2007
The GAMMASPHERE Lee, I-Yang Nuclear Physics A, Vol. 520 https://doi.org/10.1016/0375-9474(90)91181-P	journal	December 1990
Anomalous Isomeric Decays in ${}^{174}{Lu}$ as a Probe of $K$ Mixing and Interactions in Deformed Nuclei Dracoulis, G. D.; Kondev, F. G.; Lane, G. J. Physical Review Letters, Vol. 97, Issue 12 https://doi.org/10.1103/PhysRevLett.97.122501	journal	September 2006
Investigation of short-lived isomeric states with half-lives in the μs and ms region Brandi, K.; Engelmann, R.; Hepp, V. Nuclear Physics, Vol. 59, Issue 1 https://doi.org/10.1016/0029-5582(64)90111-7	journal	October 1964
Decay of high-spin isomers in Os nuclei by barrier penetration Chowdhury, P.; Fabricius, B.; Christensen, C. Nuclear Physics A, Vol. 485, Issue 1 https://doi.org/10.1016/0375-9474(88)90526-X	journal	August 1988

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