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Phys. Rev. C 75, 014308 (2007) [10 pages]

Smooth terminating bands in 112Te: Particle-hole induced collectivity

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E. S. Paul1, K. Starosta2,*, A. O. Evans1, A. J. Boston1, H. J. Chantler1, C. J. Chiara2,†, M. Devlin3,‡, A. M. Fletcher4, D. B. Fossan2, D. R. LaFosse3, G. J. Lane2,§, I. Y. Lee5, A. O. Macchiavelli5, P. J. Nolan1, D. G. Sarantites3, J. M. Sears2, A. T. Semple1, J. F. Smith2,4,**, C. Vaman2,††, A. V. Afanasjev6,7,8, and I. Ragnarsson7
1Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, United Kingdom
2Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794-3800, USA
3Department of Chemistry, Washington University, St. Louis, Missouri 63130, USA
4Schuster Laboratory, The University of Manchester, Brunswick Street, Manchester M13 9PL, United Kingdom
5Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
6Department of Physics and Astronomy, Mississippi State University, Mississippi 39762, USA
7Department of Mathematical Physics, Lund Institute of Technology, P.O. Box 118, S-22100 Lund, Sweden
8Laboratory of Radiation Physics, Institute of Solid State Physics, University of Latvia, LV 2169 Salaspils, Miera str. 31, Latvia

Received 15 August 2006; published 10 January 2007

The Gammasphere spectrometer, in conjunction with the Microball charged-particle array, was used to investigate high-spin states in 112Te via 58Ni(58Ni, 4pγ) reactions at 240 and 250 MeV. Several smooth terminating bands were established, and lifetime measurements were performed for the strongest one using the Doppler-shift attenuation method. Results obtained in the spin range 18-32ℏ yield a transition quadrupole moment of 4.0±0.5eb, which corresponds to a quadrupole deformation ɛ2=0.26±0.03; this value is significantly larger than the ground-state deformation of tellurium isotopes. It was also possible to extract a transition quadrupole moment for the yrast band in 114Xe, produced via the 58Ni (58Ni, 2pγ) reaction. A value of 3.0±0.5eb was found in the spin range 16-24ℏ, which corresponds to a quadrupole deformation ɛ2=0.19±0.03. Cranked Nilsson-Strutinsky calculations are used to interpret the results.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.75.014308
DOI:
10.1103/PhysRevC.75.014308
PACS:
21.10.Re, 23.20.Lv, 27.60.+j

*Present address: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824.

†Present address: Department of Chemistry, Washington University, St. Louis, Missouri 63130.

‡Present address: Los Alamos National Laboratory, Los Alamos, New Mexico 87545.

§Present address: Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia.

**Present address: School of Engineering and Science, University of Paisley, Paisley, PA1 2BE, United Kingdom.

††Present address: National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824.

 
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