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 (1): 3 doi: 10.1007/s41365-019-0717-9


Attenuation coefficients of gamma and X-rays passing through six materials

Xue-Dou Su1, Gao-Long Zhang 1, 2,  Shou-Ping Xu 3, Wei-Wei Qu 4, Lin Song1 , Yu-Hua Huang1 , Ben Wang 1, Yi-Feng Wang 1 , Ze-Tao Zhang 1, Wu-Fu Xu1, Ming-Li Wang1   

  1. 1School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
    2Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing 100083, China
    3Department of Radiation Oncology, PLA General Hospital, Beijing 100853, China
    4State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou 215123, China
  • Received:2019-08-19 Revised:2019-10-16 Accepted:2019-11-09
  • Contact: Gao-Long Zhang
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. 11475013, 11975040 and U1832130).
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Xue-Dou Su, Gao-Long Zhang, Shou-Ping Xu, Wei-Wei Qu, Lin Song, Yu-Hua Huang, Ben Wang, Yi-Feng Wang, Ze-Tao Zhang, Wu-Fu Xu, Ming-Li Wang. Attenuation coefficients of gamma and X-rays passing through six materials.Nuclear Science and Techniques, 2020, 31(1): 3     doi: 10.1007/s41365-019-0717-9

Abstract: The aim of this study was to determine the attenuation of gamma and X-rays with different energies caused by passage through different materials. To this end, different materials with a range of atomic numbers were chosen to measure gamma and X-ray attenuation coefficients and to explore the mechanisms of interaction of gamma and X-rays with matter of various kinds. It is shown that the attenuation coefficients first decrease and then increase with increase in the radiation (photon) energy. The attenuation of gamma and X-rays passing through materials with high atomic number is greater than that in materials with low atomic number. The attenuation minimum is related to the atomic number of the irradiated materials. The larger the atomic number is, the lower the energy corresponding to attenuation minimum is. Photoelectric and Compton effects are the main processes when gamma rays pass through individual materials with high and low atomic numbers, respectively. Therefore, for radiotherapy and radiation protection, different methods should be considered and selected for the use of gamma and X-rays of different energies for use in different materials.

Key words: Attenuation coefficient, Interaction mechanisms, Gamma rays, High-energy X-rays, Therapy and protection