(1) Institute of Modem Physics, Chinese Academy of Sciences, 730000 Lanzhou, China;(2) Institute of High Energy Physics, Chinese Academy of Sciences, 100039 Beijing, China
Abstract:
A new transuranium neutron-deficient isotope235Am was produced by 35 MeV proton to bombard the rare radioactive238Pu target. The products were transported and collected by the He-jet system. The Am isotopes were separated and purified by radiochemistry method and the y-ray, X-ray and y-X(y) coincidence of the samples was measured. The synthesis of235Am was definitely identified. Its measured half-life is (15±5) min. Project supported by the National Natural Science Foundation of China and the Chinese Academy of Sciences.