科研之友
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摘要
We searched for a temperature dependence of the half-life (T(1/2)) of (64)Cu embedded in natural copper. We did not observe any change in T(1/2) between room temperature and 12 K on the level of 0.25%. Some earlier studies had suggested an increased T(1/2) (by a few percent) for electron-capture and beta(-) decay dominated radioactive decays in a metallic environment at low temperature compared to measurements at room temperature. Our result is in excellent agreement with the recommended T(1/2) value for (64)Cu and with very recent studies on (198)Au.
- 出版日期2008-11
