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Half-life measurement of neutron-rich isotope 237Th

Half-life measurement of neutron-rich isotope 237Th

XU Yan-Bing
XIAO Yong-Hou
YANG Wei-Fan
YUAN Shuang-Gui
HE Jian-Jun
XIONG Bing
MA Tao-Tao
Nuclear Science and TechniquesVol.12, No.4pp.284-288Published in print 01 Nov 2001
44100

60 MeV/u 18O ions were used to bombard natural uranium targets, and the heavy neutron-rich isotope 237Th was produced via multi-nucleon transfer reaction and dissipative fragmentation of the heavy target. A relatively fast radiochemical procedure was used to separate thorium from the mixture of uranium and complex reaction products. The chemically separated thorium fractions were studied by the γ-ray spectroscopic method. The behaviors of the growth and decay of 853.7 and 865.0 keV γ rays of 237Pa decay were observed. The half-life of 237Th was determined to be 4.69±0.60 min.

237ThHalf-lifeMulti-nucleon transferRadiochemical separation
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