Possible chirality in the doubly-odd Tl-198 nucleus: Residual interaction at play - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2008

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

E.A. Lawrie
  • Function : Author
P.A. Vymers
  • Function : Author
J.J. Lawrie
  • Function : Author
R.A. Bark
  • Function : Author
R. Lindsay
  • Function : Author
G.K. Mabala
  • Function : Author
S.M. Maliage
  • Function : Author
P.L. Masiteng
  • Function : Author
S.M. Mullins
  • Function : Author
S.H.T. Murray
  • Function : Author
I. Ragnarsson
  • Function : Author
T.M. Ramashidzha
  • Function : Author
J.F. Sharpey-Schafer
  • Function : Author
O. Shirinda
  • Function : Author

Abstract

A candidate for chiral bands was found in (198)Tl 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.

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Dates and versions

in2p3-00854938 , version 1 (28-08-2013)

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E.A. Lawrie, P.A. Vymers, J.J. Lawrie, Ch. Vieu, R.A. Bark, et al.. Possible chirality in the doubly-odd Tl-198 nucleus: Residual interaction at play. Physical Review C, 2008, 78, pp.021305. ⟨10.1103/PhysRevC.78.021305⟩. ⟨in2p3-00854938⟩
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