Fragmentation of the two-octupole phonon multiplet in 208Pb

被引：30
|
作者：
Ponomarev, VY [1 ]
von Neumann-Cosel, P [1 ]
机构：
[1] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.82.501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The properties of the lowest two-phonon states in Pb-208 built On the collective octupole vibration are studied within the quasiparticle phonon model. Calculations including up to three-phonon coupling yield a strong fragmentation of the 6(+) member of the multiplet, explaining the failure of recent heavy ion Coulomb excitation experiments used to observe this state. Some splitting of the 2(+) strength is predicted while the 0(+) and 4(+) members remain relatively pure. The present results also question the proposed signature for the two-octupole states of enhanced El decays to one-phonon states. [S0031-9007(98)08236-2].
引用
收藏
页码：501 / 504
页数：4
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