Half-life of the electron-capture decay of Ru97: Precision measurement shows no temperature dependence
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We have measured the half-life of the electron-capture (ec) decay of Ru97 in a metallic environment, both at low temperature (19 K), 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 Be7 changes by 0.9%±0.2% under similar circumstances certainly cannot be generalized to other ec decays. Our results for the half-life of Ru97, 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 β - emitters Ru103 and Rh105 at both temperatures, and found them also to be unchanged. © 2009 The American Physical Society.
author list (cited authors)
Goodwin, J. R., Golovko, V. V., Iacob, V. E., & Hardy, J. C.