Enhancement of β+-Decay Rate of 22Na in Metal Pd at Low Temperature

Lian Gang; Su Jun; Wang Bao-Xiang; Jiang Chao; Bai Xi-Xiang; Zeng Sheng; Zheng Yong-Nan; Zhu Sheng-Yun; Zhu Li-Hua; Liu Wei-Ping; Li Zhi-Hong; Wang You-Bao; Guo Bing; Li Yun-Ju; Qin Xing

doi:10.1088/0256-307X/25/1/020

Chinese Physics Letters

Enhancement of β⁺-Decay Rate of ²²Na in Metal Pd at Low Temperature

Lian Gang¹, Su Jun¹, Wang Bao-Xiang¹, Jiang Chao¹, Bai Xi-Xiang¹, Zeng Sheng¹, Zheng Yong-Nan¹, Zhu Sheng-Yun¹, Zhu Li-Hua¹, Liu Wei-Ping¹, Li Zhi-Hong¹, Wang You-Bao¹, Guo Bing¹, Li Yun-Ju¹ and Qin Xing¹

2008 Chinese Physical Society and IOP Publishing Ltd
Chinese Physics Letters, Volume 25, Number 1 Citation Lian Gang et al 2008 Chinese Phys. Lett. 25 70 DOI 10.1088/0256-307X/25/1/020

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lgang@ciae.ac.cn

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¹ China Institute of Atomic Energy, PO Box 275(46), Beijing 102413

Dates

Received 16 October 2007

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Abstract

Temperature dependence of nuclear decays in metallic environments is a controversial issue. We measured the temperature dependence of the β⁺-decay half-life of²²Na implanted into the metal host of palladium. It is found that the β⁺ -decay half-life of²²Na in the metal Pd cooled to T = 15 K is shorter by 0.46(14)% than that at room temperature. The result is consistent in sign with, but clearly smaller than, the estimated one by the Debye model.

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