First Observation for Isotope <SUP>265</SUP>Bh(Z=107)

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

Chinese Physics C> 2004, Vol. 28> Issue(4) : 332-334

First Observation for Isotope ²⁶⁵Bh(Z=107)

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Department of Physics,Nanjing University,Nanjing 210008,China

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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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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.

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Received: 2004-01-14
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2004-01-14
Accepted Date: 1900-01-01
Available Online: 2004-04-05

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.