Abstract： Remeasurement of the half-life of 79Se has been carried out with the projectile x-ray detection (PXD) in accelerator mass spectrometry. We made two major improvements over our earlier 79Se half-life determination [Nucl. Instrum. Methods B 123 (1997) 403]. Fristly, the PXD technique has been used for separation of 79Se and 75Se from 79Br and 75As isobars respectively. Secondly, the half-life of 79Se has been measured relative to the known precise half-life of 75Se (119.79 ± 0.04d). A more reliable half-life of 79Se measured with the PXD technique is (2.95 ± 0.38)x105y, about a factor of one lower than the previous value, 1.1 x 106y. The problems in the previous measurement are discussed.
JIANG Song-Sheng;HE Ming;DIAO Li-Jun;GUO Jing-Ru;WU Shao-Yong. Remeasurement of the Half-Life of 79Se with the Projectile X-Ray Detection Method[J]. 中国物理快报, 2001, 18(6): 746-749.
JIANG Song-Sheng, HE Ming, DIAO Li-Jun, GUO Jing-Ru, WU Shao-Yong. Remeasurement of the Half-Life of 79Se with the Projectile X-Ray Detection Method. Chin. Phys. Lett., 2001, 18(6): 746-749.
WANG Shou-Yu;MA Ying-Jun;T. Komatsubara;LIU Yun-Zuo;ZHANG Yu-Hu;K. Furuno;T. Hayakawa;J. Mukai;Y. Iwata;T. Morikawa;G. B. Hagemann;G. Sletten;J. Nyberg;D. Jerrestam;H. J. Jensen;J. Espino;J. Gascon;N. GjФrup;B. Cederwall;P. O. TjФm. Structure of the πg7/2 [404] 7/2+ Band in Odd Proton Nucleus 123I[J]. 中国物理快报, 2004, 21(6): 1024-1026.
[10]
LI Guang-Sheng;MENG Rui;ZHU Li-Hua;ZHANG Zhen-Long;WANG Yue;WANG Zhi-Min;WEN Shu-Xian;LU Jing-Bin;ZHAO Guang-Yi;LI Xian-Feng;WEN Li-Jun;ZHENG Yong-Nan;ZHENG Yong;LIU Yun-Zuo;YUAN Guan-Jun;YANG Chun-Xiang. Lifetimes of Excited Levels in 131Ce[J]. 中国物理快报, 2004, 21(3): 461-463.
[11]
DONG Ke-Jun;HE Ming;WU Shao-Yong;YUE Dong-Fang;YOU Qu-Bo;BAO Yi-Wen;GUAN Yong-Jing;ZHENG Yuan-Feng;YIN Xin-Yi;WANG Hui-Juan;LI Guo-Qiang;YANG Yao-Yun;XU Guo-Ji;HU Yue-Ming; JIANG Shan. Application of 41Ca Tracer and Its AMS Measurement in
CIAE[J]. 中国物理快报, 2004, 21(1): 51-53.
2001, Vol. 18 
