EPJ

2024 Impact factor 2.8
EPJ A - Hadrons and Nuclei
Hadrons and Nuclei
Eur. Phys. J. A 7, 1-5

Short note

(EC+$\beta^{+}$) decay study of 128Ce

Li Zhankui1 - Xu Shuwei1 - Xie Yuanxiang1 - Zhang Tianmei1 - Ma Ruichang1 - Du Jinzhou2 - Guo Yingxiang1 - Ge Yuanxiu1 - Wang Chunfang1 - Guo Bing1 - Xing Jianping1

1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
2 Department of Modern Physics, Lanzhou University, Lanzhou 730000, P.R. China

Received: 29 September 1999 / Revised version: 5 November 1999 Communicated by D. Schwalm

Abstract
The (EC+ $\beta^{+}$) decay of 128Ce was reinvestigated in the 116Sn (16O, 4n) reaction by using a helium-jet tape transport system. The close half-lives of 128Ce and 129Ce made it difficult to separate the decay $\gamma $ rays of both nuclei apart. Instead of the excitation-function measurements, both reactions of 16O+116 Sn and 16O+117Sn were carried out, and from their comparisons, the decay $\gamma $ rays of 128Ce were clearly told from those of 129 Ce. Based on X-$\gamma $ and $\gamma $-$\gamma $ coincidence measurements, a detailed (EC+ $\beta^{+}$) decay scheme of 128Ce has been proposed, which revises the previous one.

PACS
23.20.Lv Gamma transitions and level energies - 23.40.-s $\beta$ decay; electron and muon capture - 27.60.+j $90 \leq A \leq 149$

Copyright Società Italiana di Fisica, Springer-Verlag 2000

Conference announcements