Alpha-decay characteristics of neutron-deficient Po-190, Bi-189 and Pb-186 isotopes

被引：22
作者：
Andreyev, AN
Bijnens, N
Enqvist, T
Huyse, M
Kuusiniemi, P
Leino, M
Trzaska, WH
Uusitalo, J
VanDuppen, P
机构：
[1] UNIV LOUVAIN,INST KERN & STRALINGSFYS,B-3001 LOUVAIN,BELGIUM
[2] UNIV JYVASKYLA,DEPT PHYS,FIN-40351 JYVASKYLA,FINLAND
来源：
ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI | 1997年 / 358卷 / 01期
关键词：
D O I：
10.1007/s002180050276
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 neutron-deficient Po-190 and Bi-189 isotopes have been produced in the 2n respectively p2n channels of the Ti-48 + Sm-144 reaction. Cross sections for different reaction channels are given. For Po-190, improved values of alpha-energy E-alpha = 7550(15) keV and half-life T-1/2 = 1.9(-0.4)(+0.6) ms were measured. By using correlated alpha-decay chains an alpha-branching ratio of 0.50(25) was deduced for Pb-186. The reduced alpha-width systematic is extended for both of these isotopes, confirming a persistence of the saturation towards the lighter Po isotopes and the absence of any anomalies for the neutron-deficient Pb isotopes. For Bi-189 improved values of E-alpha = 7300(15) keV and T-1/2 = 4.8(5) ms were measured.
引用
收藏
页码：63 / 68
页数：6
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