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Possible chirality in the doubly-odd Tl-198 nucleus: Residual interaction at play

Lawrie, E. A.; Vymers, P. A.; Lawrie, J. J.; Vieu, Ch.; Bark, R. A.; Lindsay, R.; Mabala, G. K.; Maliage, S. M.; Masiteng, P. L. and Mullins, S. M., et al. (2008) In Physical Review C (Nuclear Physics) 78(2).
Abstract
A candidate for chiral bands was found in Tl-198 for the first time in a mass region of oblate (or nonaxial with gamma >= 30 degrees) deformed nuclei. Two bands show very similar quasiparticle alignments, moments of inertia, and B(M1)/B(E2) ratios. They have a relative excitation energy of about 500 keV and different patterns of energy staggering. Calculations using the two-quasiparticle-plus-triaxial-rotor model with residual proton-neutron interaction included show that a triaxial deformation with gamma similar to 44 degrees agrees very well with all the experimental observations. Furthennore, considerable energy staggering for both partner bands was calculated for this pi h(9/2) circle times vi(13/2)(-1) configuration at gamma - 30... (More)
A candidate for chiral bands was found in Tl-198 for the first time in a mass region of oblate (or nonaxial with gamma >= 30 degrees) deformed nuclei. Two bands show very similar quasiparticle alignments, moments of inertia, and B(M1)/B(E2) ratios. They have a relative excitation energy of about 500 keV and different patterns of energy staggering. Calculations using the two-quasiparticle-plus-triaxial-rotor model with residual proton-neutron interaction included show that a triaxial deformation with gamma similar to 44 degrees agrees very well with all the experimental observations. Furthennore, considerable energy staggering for both partner bands was calculated for this pi h(9/2) circle times vi(13/2)(-1) configuration at gamma - 30 degrees, suggesting that chiral bands may have substantial energy staggering. (Less)
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Physical Review C (Nuclear Physics)
volume
78
issue
2
publisher
American Physical Society
external identifiers
  • wos:000259368700006
  • scopus:50649113460
ISSN
0556-2813
DOI
10.1103/PhysRevC.78.021305
language
English
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yes
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f7dbe66d-55da-4d84-97f1-92e96bf98e04 (old id 1287183)
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2009-01-28 09:47:06
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@article{f7dbe66d-55da-4d84-97f1-92e96bf98e04,
  abstract     = {A candidate for chiral bands was found in Tl-198 for the first time in a mass region of oblate (or nonaxial with gamma >= 30 degrees) deformed nuclei. Two bands show very similar quasiparticle alignments, moments of inertia, and B(M1)/B(E2) ratios. They have a relative excitation energy of about 500 keV and different patterns of energy staggering. Calculations using the two-quasiparticle-plus-triaxial-rotor model with residual proton-neutron interaction included show that a triaxial deformation with gamma similar to 44 degrees agrees very well with all the experimental observations. Furthennore, considerable energy staggering for both partner bands was calculated for this pi h(9/2) circle times vi(13/2)(-1) configuration at gamma - 30 degrees, suggesting that chiral bands may have substantial energy staggering.},
  author       = {Lawrie, E. A. and Vymers, P. A. and Lawrie, J. J. and Vieu, Ch. and Bark, R. A. and Lindsay, R. and Mabala, G. K. and Maliage, S. M. and Masiteng, P. L. and Mullins, S. M. and Murray, S. H. T. and Ragnarsson, Ingemar and Ramashidzha, T. M. and Schuck, C. and Sharpey-Schafer, J. F. and Shirinda, O.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {2},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {Possible chirality in the doubly-odd Tl-198 nucleus: Residual interaction at play},
  url          = {http://dx.doi.org/10.1103/PhysRevC.78.021305},
  volume       = {78},
  year         = {2008},
}