DISTRIBUTION OF 2-PHONON STRENGTH IN EVEN N = 82 NUCLEI

被引：96

作者：

GRINBERG, M

STOYANOV, C

机构：

[1] Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, 1784 Sofia

来源：

NUCLEAR PHYSICS A | 1994年 / 573卷 / 02期

关键词：

D O I：

10.1016/0375-9474(94)90169-4

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The fragmentation of two-phonon components in the structure of the low-lying states in Ba-138, Ce-140, Nd-142 and 144Sm is investigated in the framework of the quasiparticle-phonon model. The level energies and the transitions relevant to the members of quadrupole-octupole and octupole-octupole two-phonon multiplets are calculated and compared to experiment in the case of 144Sm. For the other N = 82 nuclei considered in the paper, predictions are given. The two-phonon-character of the first 1- state is confirmed on the basis of calculations including a large one-, two- and three-phonon basis. A B(E1; 1(1)- --> g.s.) value of the order of 10(-3) W.u. is obtained taking into account the influence of the giant dipole resonance. Several E1, E2 and E3 transitions are calculated which give additional information on the properties of the two-phonon states in the N = 82 region.

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页码：231 / 244

页数：14

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