Production and Assignment of a New Transuranium Neutron-Deficient Isotope 235Am
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SHI Li-jun,
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GUO Jun-sheng,
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LIU Hong-ye,
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GAN Zai-guo,
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YANG Wei-fan,
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MOU Wan-tong,
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GUO Tian-rui,
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SHEN Shui-fa,
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FANG Ke-ming,
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YUAN Shuang-gui,
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QIN Zhi,
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ZHANG Xue-qian,
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MA Rui-chang,
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ZHONG Ji-quan,
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WANG Shu-hong,
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KONG Deng-ming,
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QIAO Ji-min
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Abstract
A new transuranium neutron-deficient isotope 235Am was produced via the reaction of 238Pu ( p , 4n) 235Am by using a 35 MeV proton beam. The recoiled products were collected by a helium-jet and long-capillary system. Americium isotopes were separated out by a rapid radiochemical method. X-ray, γ-ray, and x-γ coincidence measurements were taken in the study. According to 235Pu decay γ-ray and Np K x-ray growth-decay property, 235Am was definitely identified and its half life is determined as 15 ± 5 min.
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