8-12 July 2013
Africa/Johannesburg timezone
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194Tl as the first example revealing chiral symmetry breaking in the pair of four-quasiparticle bands

Presented by Dr. Paulus MASITENG on 10 Jul 2013 from 17:40 to 18:40
Type: Poster Presentation
Session: Poster2
Track: Track B - Nuclear, Particle and Radiation Physics

Abstract

A study of <sup>194</sup>Tl has revealed the presence of two strongly coupled negative-parity rotational bands up to the 24<sup>-</sup> and 23<sup>-</sup> states, respectively. These two bands are associated with the two-quasiparticle configuration at lower spins and the four-quasiparticle configuration at higher spins. The two 4-quasiparticle bands show exceptionally close near-degeneracy in the excitation energies as well as close similarity in their alignments and <i>B(M1)/B(E2)</i> reduced transition probability ratios. This is one of the best cases of near degeneracy in partner bands observed to date, probably resulting from a chiral geometry in the angular momentum space. This is the first pair of 4-quasiparticle bands associated with chiral symmetry.

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Co-authors

  • Dr. Elena LAWRIE iThemba LABS, National Research Foundation, P.O. Box 722, 7129 Somerset West, South Africa
  • Mr. Marius RAMASHIDZHA University of the Western Cape, Private Bag X17, 7535 Bellville, South Africa
  • Dr. RA BARK iThemba LABS, National Research Foundation, P.O. Box 722, 7129 Somerset West, South Africa
  • Dr. BG CARLSON Division of Mathematical Physics,, 221 00 Lund, Sweden LTH, Lund University
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