Synthesis and Identification of the New Neutron-Deficient Isotope <sup>235</sup>Am in the Transuranium Region

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; Qiao Jimin

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

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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.
- transuranium nuclide ,
- new isotope ,
- radiochemistry separation ,
- half-life

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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.

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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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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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.

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

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