2014
Journal Article
Title

Resolution of chiral conundrum in ยน06Ag: Doppler-shift lifetime investigation

Abstract
The nature of the chiral candidate bands in ยน06Ag, one of only two known examples of candidates which actually cross, is investigated experimentally and theoretically. Lifetimes have been determined for these bands in ยน06Ag using the Doppler-shift attenuation method with the g-detector array AFRODITE. The level scheme of ยน06Ag has been extended, and three negative-parity bands have been observed to high spins. Configurations were assigned to the negative-parity bands based on a quasiparticle alignment analysis and on configuration-fixed constrained relativistic mean field calculations. The excitation energies, B(M1) and B(E2) values, as well as B(M1)/B(E2) ratios have been compared with results of particle-rotor model calculations. From the investigations, it is concluded that the three close-lying negative-parity bands are a two-quasiparticle high-K band and a pair of four-quasiparticle bands. The proposal that the two lowest-lying bands are chiral partners has not been confirmed.
Author(s)
Lieder, Evgenia O.  
iThemba LABS, Somerset West, South Africa / Fraunhofer INT, Euskirchen, Germany
Lieder, R.M.
iThemba LABS, Somerset West, South Africa
Bark, R.A.
iThemba LABS, Somerset West, South Africa
Chen, Q.B.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China
Zhang, S.Q.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China
Meng, J.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China / School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, China / Department of Physics, University of Stellenbosch, Stellenbosch, South Africa
Lawrie, E.A.
iThemba LABS, Somerset West, South Africa
Lawrie, J.J.
iThemba LABS, Somerset West, South Africa
Bvumbi, S.P.
iThemba LABS, Somerset West, South Africa
Kheswa, N.Y.
iThemba LABS, Somerset West, South Africa
Ntshangase, S.S.
iThemba LABS, Somerset West, South Africa
Madiba, T.E.
iThemba LABS, Somerset West, South Africa
Masiteng, P.L.
iThemba LABS, Somerset West, South Africa
Mullins, S.M.
iThemba LABS, Somerset West, South Africa
Murray, S.
iThemba LABS, Somerset West, South Africa
Papka, P.
iThemba LABS, Somerset West, South Africa
Roux, D.G.
Department of Physics and Electronics, Rhodes University, Grahamstown, South Africa
Shirinda, O.
iThemba LABS, Somerset West, South Africa
Zhang, Z.H.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China
Zhao, P.W.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China
Li, Z.P.
School of Physical Science and Technology, Southwest University, Chongqing, China
Peng, J.
Department of Physics, Beijing Normal University, Beijing, China
Qi, B.
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Shandong University, Weihai, China
Wang, S.Y.
Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Shandong University, Weihai, China
Xiao, Z.G.
Department of Physics, Tsinghua University, Beijing, China / Collaborative Innovation Center of Quantum Matter, Beijing, China
Xu, C.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China
Journal
DOI
Language
English