The half-life of 198Au : High-precision measurement shows no temperature dependence |
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Authors: | J. R. Goodwin V. V. Golovko V. E. Iacob J. C. Hardy |
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Affiliation: | (1) Cyclotron Institute, Texas A&M University, 77843 College Station, TX, USA |
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Abstract: | We have measured the half-life of the β -decay of 198Au 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 0.04%, a finding that contradicts a recent report of a 3.6±1.0 % difference in the 198Au half-life when measured at essentially the same two temperatures. Our results for the half-life, 2.6949±0.0009 d at room temperature and 2.6953±0.0008 d at 19K, also agree well with previous precision room temperature measurements. |
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Keywords: | 21.10.Tg Lifetimes, 23.40.-s β decay double β decay electron and muon capture 27.80.+w 190 ⩽ A ⩽ 219 |
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