Coexistence of chiral symmetry and pseudospin symmetry in one nucleus: triplet bands in 105Ag. (13th February 2019)

• Record Type: Journal Article
• Authors: Jia, Hui; Qi, Bin; Liu, Chen; Wang, Shou-Yu
• Is Part Of: Journal of physics. Volume 46:Number 3(2019)
• Publication Date: 2019-02-13
• Subjects: chiral doublet bands -- pseudospin doublet bands -- relativistic mean-field (RMF) theory -- particle rotor model (PRM); Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/ab025c
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: The nearly degenerate triplet bands with the π g 9 / 2 − 1 ⨂ ν h 11 / 2 ( g 7 / 2 − 1, d 5 / 2 − 1 ) configuration in 105 Ag are studied via the relativistic mean-field (RMF) theory and the multiparticle plus rotor model (MPRM). The configuration-fixed constrained triaxial RMF calculations exhibit pseudospin symmetry in single-particle spectra and triaxial shape coexistence. The experimental excitation energies and electromagnetic transition probabilities for the triplet bands are well reproduced by the MPRM calculations. The first and second lowest energy bands of the triplet bands are interpreted as pseudospin doublet bands, and the second and third bands are interpreted as chiral doublet bands. The chiral doublet bands show the same phase in the B ( M 1)/ B ( E 2) staggering, while the pseudospin doublet bands hold the opposite phase. Such triplet bands in 105 Ag provide the first example for the coexistence of chiral symmetry and pseudospin symmetry in one single nucleus.