Fast-timing lifetime measurements of the 33/2+ and 25/2− states in 189Hg: oblate excitations. (1st May 2022)

• Record Type: Journal Article
• Authors: Zheng, Y; Li, C B; Wu, X G; Ma, H L; Zhu, L H; Li, T X; Huang, Z Y; Chen, H; He, C Y; Fan, Q W; Li, G S; Chen, Q M; Zhong, J; Hu, S P; Li, H W; Wang, J L; Liu, J J; Wu, Y H; Luo, P W
• Is Part Of: Journal of physics. Volume 49:Number 5(2022)
• Publication Date: 2022-05-01
• Subjects: lifetime measurement -- fast-timing techniques -- Nilsson–Strutinsky–Bogoliubov model; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/ac58b0
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: The lifetimes of the I π = 33/2 + and I π = 25/2 − states with E x = 2674.6 keV and E x = 1917.3 keV, respectively, in 189 Hg have been determined by using the fast-timing techniques with the HPGe and LaBr3 :Ce array via the 175 Lu( 19 F, 5 n ) 189 Hg reaction at a beam energy of 100 MeV. The deduced B ( E 2) strengths have been discussed in relation to the systematics of the previously reported B ( E 2) strengths in the heavy mercury isotopes. The transition quadrupole moments Q t are derived from present experimental data. The Q t values together with the excitation energies of the (+, 0)(+, 1/2) and (+, 0)(−, 1/2) bands are interpreted in terms of the Nilsson–Strutinsky–Bogoliubov model (CNSB) calculations suggesting oblate excitations in 189 Hg.