First Observation for Isotope 265Bh(Z=107)

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GAN Zai-Guo, FAN Hong-Mei, QIN Zhi, WU Xiao-Lei, GUO Jun-Sheng, LEI Xiang-Guo, DONG Cheng-Fu, XU Hua-Gen, CHEN Ruo-Fu, ZHANG Fu-Ming, GUO Bin, LIU Hong-Ye, WANG Hua-Lei, First Observation for Isotope 265Bh(Z=107)[J]. Chinese Physics C, 2004, 28(4): 332-334.
GAN Zai-Guo, FAN Hong-Mei, QIN Zhi, WU Xiao-Lei, GUO Jun-Sheng, LEI Xiang-Guo, DONG Cheng-Fu, XU Hua-Gen, CHEN Ruo-Fu, ZHANG Fu-Ming, GUO Bin, LIU Hong-Ye, WANG Hua-Lei, First Observation for Isotope 265Bh(Z=107)[J]. Chinese Physics C, 2004, 28(4): 332-334. shu
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Received: 2004-01-14
Revised: 1900-01-01
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First Observation for Isotope 265Bh(Z=107)

    Corresponding author: GAN Zai-Guo,
  • Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Department of Physics,Nanjing University,Nanjing 210008,China

Abstract: New isotope 265Bh(Z=107) was produced in bombardment of an 243Am target with 135MeV 26Mg ions at HIRFL. Identification was made by observation of correlated α particle decays between the new isotope 265Bh and its 261Db and 257Lr daughters with four pairs of detectors. A total of 8 correlated decay events of 265Bh and 4 decay events of 264Bh were identified. 265Bh decays with a 0.94+0.70-0.31s half-life by emission of α particle with an average energy of (9.24±0.05)MeV.

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