Half-life of the electron-capture decay of 97Ru: Precision measurement shows no temperature dependence

Details Half-life of the electron-capture decay of 97Ru: Precision measurement shows no temperature dependence Half-life of the electron-capture decay of 97Ru: Precision measurement shows no temperature dependence

2009-10-22

arxiv.org/abs/0910.4338v1

Phys.Rev.C80:045501,2009

Physics

Nuclear Physics

Nuclear Experiment

6 pages, 6 figures

Scientific paper

10.1103/PhysRevC.80.045501

We have measured the half-life of the electron-capture (ec) decay of 97Ru in a metallic environment, both at low temperature (19K), and also at room temperature. We find the half-lives at both temperatures to be the same within 0.1%. This demonstrates that a recent claim that the ec decay half-life for 7Be changes by $0.9% +/- 0.2% under similar circumstances certainly cannot be generalized to other ec decays. Our results for the half-life of 97Ru, 2.8370(14)d at room temperature and 2.8382(14)d at 19K, are consistent with, but much more precise than, previous room-temperature measurements. In addition, we have also measured the half-lives of the beta-emitters 103Ru and 105Rh at both temperatures, and found them also to be unchanged.

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