Do radioactive half-lives vary with the Earth-to-Sun distance?

被引：23
|
作者：
Hardy, J. C. [1 ]
Goodwin, J. R. [1 ]
Iacob, V. E. [1 ]
机构：
[1] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA
来源：
APPLIED RADIATION AND ISOTOPES | 2012年 / 70卷 / 09期
关键词：
Half-life; Time dependence; Au-198; LIFE;
D O I：
10.1016/j.apradiso.2012.02.021
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Recently, Jenkins, Fischbach and collaborators have claimed evidence that radionuclide half-lives vary systematically over a +/- 0.1% range as a function of the oscillating distance between the Earth and the Sun, based on multi-year activity measurements. We have avoided the time-dependent instabilities to which such measurements are susceptible by directly measuring the half-life of Au-198 (t(1/2)=2.695 d) on seven occasions spread out in time to cover the complete range of Earth-Sun distances. We observe no systematic oscillations in half-life and can set an upper limit on their amplitude of +/- 0.02%. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1931 / 1933
页数：3
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