Investigations of nuclear chirality at iThemba LABS  

作　　者：R.A.Bark E.A.Lawrie C.Liu S.Y.Wang 

机构地区：[1]iThemba Laboratory for Accelerator Based Sciences,National Research Foundation,P.O.Box 722,Somerset-West 7129,South Africa [2]Department of Physics,University of the Western Cape,Private Bag X17,7535,Bellville,South Africa [3]Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,Institute of Space Sciences,Shandong University,Weihai 264209,China

出　　处：《Frontiers of physics》2024年第2期7-38,共32页物理学前沿（英文版）

基　　金：supported by the National Research Foundation of South Africa under Grant Nos.65268,65581,75248,75357,76632,80977,88646,90741,91446,92791,92792,93531,103478,109134 and 116666;the Outstanding Youth Fund of the Natural Science Foundation of Shandong Province(No.ZR2020YQ07);the National Natural Science Foundation of China(Nos.U2167202,12075137,12075138,and 12225504).

摘　　要：Progress in the studies of chirality in atomic nuclei at iThemba LABS is reviewed.New regions of chirality,around mass 80 and 190 have been discovered using the AFRODITE array,specifically in the nuclei^(74)As,^(78,80,82)Br,^(81)Kr,and^(193,194,198)Tl.Many phenomena have been observed,including multiple chiral bands in the same nucleus,the coexistence of octupole correlations and nuclear chirality,and the coexistence of pseudo spin and nuclear chirality.The best example of chiral degeneracy to date was found in ^(194)Tl.The level scheme of ^(106)Ag has been revisited and interpreted in terms of two-and four-quasiparticle bands.Investigations using the particle-rotor model have shown that the fingerprints of chirality in the two-quasiparticle system only can occur in an idealised model description.For systems with a higher number of quasiparticles,the calculations showed that nuclear chirality can persist.

关 键 词：CHIRALITY high-spin states particle-rotor model 

分 类 号：O57[理学—粒子物理与原子核物理]