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
China Institute of Atomic Energy, PO Box 275(46), Beijing 102413
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
China Institute of Atomic Energy, PO Box 275(46), Beijing 102413
摘要Temperature dependence of nuclear decays in metallic environments is a controversial issue. We measured the temperature dependence of the β+-decay half-life of 22Na implanted into the metal host of palladium. It is found that the β+-decay half-life of 22Na in the metal Pd cooled to T=15K 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.
Abstract：Temperature dependence of nuclear decays in metallic environments is a controversial issue. We measured the temperature dependence of the β+-decay half-life of 22Na implanted into the metal host of palladium. It is found that the β+-decay half-life of 22Na in the metal Pd cooled to T=15K 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.
LIAN Gang;SU Jun;WANG Bao-Xiang;JIANG Chao;BAI Xi-Xiang;ZENGSheng;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. Enhancement of β+-Decay Rate of 22Na in Metal Pd at Low Temperature[J]. 中国物理快报, 2008, 25(1): 70-72.
LIAN Gang, SU Jun, WANG Bao-Xiang, JIANG Chao, BAI Xi-Xiang, ZENGSheng, 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. Enhancement of β+-Decay Rate of 22Na in Metal Pd at Low Temperature. Chin. Phys. Lett., 2008, 25(1): 70-72.
[1] Raiola F et al%, Migliardi P, Lian G, Bonomo C, Gyurky G et al2002 Phys. Lett. B 547 193 [2] Raiola F et al 2004 Eur. Phys. J. A 19 283 [3] Raiola F et al 2005 J. Phys. G 31 1141 [4] Yuki H et al %, Kasagi J, Lipson A G, Ohtsuki T, Baba T1998 JETP Lett. 68 823 [5] Kasagi J et al 2002 J. Phys. Soc. Jpn. 712881 Kasagi J et al 2004 J. Phys. Soc. Jpn. 73 608 [6] Czerski K et al 2001 Europhys. Lett. 54 449 Czerski K, Huke A, Heide P and Ruprecht G 2004 Europhys.Lett. 68 363 [7] Cruz J et al 2005 Phys. Lett. B 624 181 [8] Zahnow D, Rolfs C, Schmidt S and Trautvetter H P 1997 Z.Phys. A 359 211 [9] Kettner\,K U, Becker H W, Strieder F and Rolfs C 2006 J.Phys. G 32 489 [10] Norman E B et al 2001 Phys. Lett. B 519 15 [11] Liu Z Y et al 2003 Chin. Phys. Lett. 20 829 [12] Zhou S H et al 2005 Chin. Phys. Lett. 22565 [13] Limata B N et al 2006 Eur. Phys. J. A 27(s01) 193 [14] Nir-El Y et al 2007 Phys. Rev. C 75 012801 [15] Jeppesen H B et al 2007 Eur. Phys. J. A 3231 [16] Wang B et al 2006 Eur. Phys. J. A 28 375 [17] Spillane T et al 2007 Eur. Phys. J. A 31203 [18] Limata B et al 2006 Eur. Phys. J. A 28 251 [19] Ruprecht G et al 2006 Proceedings of Science(International Symposium on Nuclear Astrophysics: Nuclei in theCosmos IX 171, CERN) [20] Raiola F et al 2007 Eur. Phys. J. A 32 51 [21] Severijns N et al 2007 Phys. Rev. C 76024304 [22] Stone N J et al 2007 Nucl. Phys. A 793 1
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2008, Vol. 25 
