Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (9): 91 doi: 10.1007/s41365-020-00800-y


Preparation of large-area isotopic magnesium targets for the 25Mg(p, γ)26Al experiment at JUNA

Chen Chen1,2 • Yun-Ju Li2 • Hao Zhang2 • Zhi-Hong Li2,3   

  1. 1 School of Physics, Zhengzhou University, Zhengzhou 451400, China
    2 China Institute of Atomic Energy, P. O. Box 275(10), Beijing 102413, China
    3 School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 101408, China
  • Received:2020-06-11 Revised:2020-07-03 Accepted:2020-07-11
  • Contact: Yun-Ju Li
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. 11490563, 11575292 and 11205247); the National Key Research and Development Project (No. 2016YFA0400502), and Continuous Basic Scientific Research Project (No. WDJC-2019-13).
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Chen Chen, Yun-Ju Li, Hao Zhang, Zhi-Hong Li. Preparation of large-area isotopic magnesium targets for the 25Mg(p, γ)26Al experiment at JUNA.Nuclear Science and Techniques, 2020, 31(9): 91     doi: 10.1007/s41365-020-00800-y

Abstract: To study the 25Mg(𝑝,𝛾)26Al  reaction at the Jinping Underground Nuclear Astrophysics laboratory, a large-area 25Mg target with a uniform thickness is needed. A rotating unit is used to ensure the uniformity of the target thickness during evaporation. After many attempts, 19 targets with diameters of 40 mm and a non-uniformity of 8.4% were prepared simultaneously. The rate of material utilization was approximately 4.7 times higher than that obtained using a conventional evaporation method.

Key words: Vacuum evaporation, Substrate rotation, Uniformity, Material utilization