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Identification of a new neutron-deficient isotope235Am

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Abstract

A neutron deficient isotope235Am has been produced via the reaction238Pu(p,4n)235Am by 35MeV proton bombardment of238Pu. The reaction products were transported by the He-jet-recoil-transport apparatus. Radiochemical separations were performed by liquid-liquid extraction to isolate the americium fraction from the mixture of the reaction products. The chemically separated Am fractions were used for the X- and gamma-ray measurements. A new neutron-deficient isotope235Am was definitely identified from the growth and decay of its daughter, 25.3·min235Pu and X-γ coincidence measurements. The235Am half-life was determined to be 15±5 min.

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Authors and Affiliations

  1. Institute of Modern Physics, Chinese Academy of Sciences, 73000, Lanzhou, P.R. China

    Yang Weifan, Guo Junsheng, Mou Wantong, Fang Keming, Gan Zaiguo, Li Hongye, Shi Lijun, Shen Shuifa & Yuan Shuanggui

  2. Institute of High Energy Physics, Chinese Academy of Sciences, 100039, Beijing, P.R. China

    Wang Shuhong, Kong Denming & Qiao Jimin

Authors
  1. Yang Weifan
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  2. Guo Junsheng
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  3. Mou Wantong
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  4. Fang Keming
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  5. Gan Zaiguo
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  6. Li Hongye
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  7. Shi Lijun
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  8. Shen Shuifa
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  9. Yuan Shuanggui
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  10. Wang Shuhong
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  11. Kong Denming
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  12. Qiao Jimin
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Weifan, Y., Junsheng, G., Wantong, M. et al. Identification of a new neutron-deficient isotope235Am. J Radioanal Nucl Chem 240, 379–381 (1999). https://doi.org/10.1007/BF02349184

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  • DOI: https://doi.org/10.1007/BF02349184

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