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Chinese Physics C> 1996, Vol. 20> Issue(S1) : 31-32 

Synthesis and Identification of the New Neutron-Deficient Isotope 235Am in the Transuranium Region

  •  1 Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou, China;

  •  2 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China

  • A new neutron-deficient isotope235Am was synthesized in the reaction of 238Pu(p,4n)235Am by using 35 MeV proton bombarding 238Pu target. The products were transported by the He-jet system. The Am was separated from the reaction products using the radiochemistry method. The γ-ray of 235Pu and X-ray of Np following the EC decay of 235Am were observed. Based on the growth-decay curve of X-ray of Np and the X-γ coincidence measurements, the synthesis of 235Am was confirmed for the first time. The measured half-life of 235Am is 15 ±5 min.
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Guo Junsheng, Gan Zaiguo, Liu Hongye, Shi Lijun, Yang Wefan, Mou Wantong, Guo Tianrui, Fang Kerning, Shen Shuifa, Yuan Shuanggui, Zhong Jiquan, Zhang Xueqian, Qin Zhi, Ma Ruichang, Wang Shuhong, Kong Dengming and Qiao Jimin. Synthesis and Identification of the New Neutron-Deficient Isotope 235Am in the Transuranium Region[J]. Chinese Physics C, 1996, 20(S1): 31-32.
Guo Junsheng, Gan Zaiguo, Liu Hongye, Shi Lijun, Yang Wefan, Mou Wantong, Guo Tianrui, Fang Kerning, Shen Shuifa, Yuan Shuanggui, Zhong Jiquan, Zhang Xueqian, Qin Zhi, Ma Ruichang, Wang Shuhong, Kong Dengming and Qiao Jimin. Synthesis and Identification of the New Neutron-Deficient Isotope 235Am in the Transuranium Region[J]. Chinese Physics C, 1996, 20(S1): 31-32. shu
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Received: 1995-12-29
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    Supported by the National Natural Science Foundation of China and the Foundation of the Chinese Academy of Sciences.

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Synthesis and Identification of the New Neutron-Deficient Isotope 235Am in the Transuranium Region

  • 1 Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou, China;
  • 2 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
  • Received Date: 1995-12-29
Fund Project:  Supported by the National Natural Science Foundation of China and the Foundation of the Chinese Academy of Sciences.

Abstract: A new neutron-deficient isotope235Am was synthesized in the reaction of 238Pu(p,4n)235Am by using 35 MeV proton bombarding 238Pu target. The products were transported by the He-jet system. The Am was separated from the reaction products using the radiochemistry method. The γ-ray of 235Pu and X-ray of Np following the EC decay of 235Am were observed. Based on the growth-decay curve of X-ray of Np and the X-γ coincidence measurements, the synthesis of 235Am was confirmed for the first time. The measured half-life of 235Am is 15 ±5 min.

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