Signature-dependent effects of gamma vibration on E2 transitions in rotating odd-A nuclei
1990; Elsevier BV; Volume: 519; Issue: 3 Linguagem: Inglês
10.1016/0375-9474(90)90446-s
ISSN1873-1554
Autores Tópico(s)Advanced Chemical Physics Studies
ResumoAbstract Signature-dependent effects of gamma vibration on properties of rotating odd-A nuclei are studied by means of the quasiparticle-vibration-coupling approach based on the cranking-plus-RPA formalism. In the first half of this paper, the signature dependence and the shell-filling dependence of both the quasiparticle-vibration-coupling wave function and of the E2 transitions in the γ = 0 case are discussed. The gamma-vibrational effect on B(E2: I → I − 2) is shown to be weaker than that on B(E2: I → − 1). In the second half, the vibrational effect on B(E2: I → I − 1) in γ ≠ 0 cases is shown to defeat the effect of the static gamma deformation of the rotating potential when γ(pot) is smaller than the zero-point amplitude γ0. A prediction is given for the signature and the shell-filling dependence of B(E2: I → I − 1) and for the sign change of E2 M1 mixing ratio in an experimentally accessible isotope chain, 159–169Yb.
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