Measurement of the half-life of 198Au in a non-metal: High-precision measurement shows no host-material dependence

Details Measurement of the half-life of 198Au in a non-metal: High-precision measurement shows no host-material dependence Measurement of the half-life of 198Au in a non-metal: High-precision measurement shows no host-material dependence

2010-09-09

arxiv.org/abs/1009.1864v2

Phys.Rev.C82:044320,2010

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

10.1103/PhysRevC.82.044320

We have measured the half-life of the beta decay of 198Au to be 2.6948(9) d, with the nuclide sited in an insulating environment. Comparing this result with the half-life we measured previously with a metallic environment, we find the half-lives in both environments to be the same within 0.04%, thus contradicting a prediction that screening from a "plasma" of quasi-free electrons in a metal increases the half-life by as much as 7%.

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