Precise half-life measurement of the superallowed β+ emitter 38Ca

被引：21

作者：

Park, H. I. ^{[1
]}

Hardy, J. C. ^{[1
]}

Iacob, V. E. ^{[1
]}

Banu, A. ^{[1
]}

Chen, L. ^{[1
]}

Golovko, V. V. ^{[1
]}

Goodwin, J. ^{[1
]}

Horvat, V. ^{[1
]}

Nica, N. ^{[1
]}

Simmons, E. ^{[1
]}

Trache, L. ^{[1
]}

Tribble, R. E. ^{[1
]}

机构：

[1] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77845 USA

来源：

PHYSICAL REVIEW C | 2011年 / 84卷 / 06期

关键词：

POSITRON DECAYS;

D O I：

10.1103/PhysRevC.84.065502

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 half-life of Ca-38, a T-Z = -1 superallowed 0(+) -> 0(+) beta(+) emitter, has been measured to be 443.77(36) ms. In our experiment, pure sources of 38Ca were produced and the decay positrons were detected in a high-efficiency 4 pi proportional gas counter. Since the beta(+) decay of Ca-38 feeds K-38(m), which is itself a superallowed beta(+) emitter, the data were analyzed as a linked parent-daughter decay. Our result, with a precision of 0.08%, is a factor of 5 improvement on the best previous result.

引用

页数：8

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