THE HIGH-SPIN STRUCTURE OF PO-202 AND PO-204 AND SYSTEMATIC FEATURES OF THE EVEN POLONIUM ISOTOPES

被引：17
|
作者：
FANT, B [1 ]
WECKSTROM, T [1 ]
KALLBERG, A [1 ]
机构：
[1] MANNE SIEGBAHN INST PHYS,S-10405 STOCKHOLM,SWEDEN
来源：
PHYSICA SCRIPTA | 1990年 / 41卷 / 05期
关键词：
D O I：
10.1088/0031-8949/41/5/005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The high-spin structure of 202, 204Po was studied using the 196, 198Pt(12C, 6n) and 204Pb(α, 4n) reactions at a beam energy of 100 and 52-54 MeV, respectively. In-beam conversion electron and γ-ray spectroscopy measurements including γγ(t) coincidence, γ(t) and angular distributions were performed. The level scheme of 202Po was extended to spin 21 h and the excitation energy 5.5 MeV while levels in 204Po were observed at 5.9 MeV with a spin of 20 h. The previously observed isomeres in 202Po and 204Po were confirmed and in addition to these a Jπ = 13− level with the half-life 9(3) ns was observed in 204Po at 3387.3 keV. The expected configuration of this state is πh9/22 ⊗ vf5/2-1 i13/2-1. A shell-model description of the observed excited states is given. © 1990 IOP Publishing Ltd.
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页码：652 / 659
页数：8
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