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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 7-ray spectroscopic method. The behaviors of the growth and decay of 853.7 and 865.0 keV-γrays of 237Pa decay were observed. The half-life of 237Th was determined to be 4.69±0.60 nun.
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 The chemistry of thorium fractions were studied by the 7-ray spectroscopic method. The behaviors of the growth and decay of 853.7 and 865.0 keV-γrays of 237 Pa decay were observed. The half-life of 237Th was determined to be 4.69 ± 0.60 nun.