RADIATION PROTECTION ›› 2022, Vol. 42 ›› Issue (5): 395-401.

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Calculation and analysis of gamma-ray exposure buildup factor for common double-layer materials

LI Hua, WEI Ziyang, ZHAO Yuan, LIU Liye, LI Hui, WEI Jiafu   

  1. China Institute for Radiation Protection, Shanxi Provincial Key Laboratory forTranslational Nuclear Medicine and Precision Protection, Taiyuan 030006
  • Received:2021-11-15 Online:2022-09-20 Published:2022-10-17

Abstract: Based on Geant4, a calculation program for the buildup factors of the double-layer materials was developed and the exposure buildup factor database of double-layer combination for some common materials (water, iron, lead and concrete) at nuclear facility site were calculated and established. Meanwhile, some calculation results are compared with corresponding simulation data of empirical formula with good reliability and the main reasons for their difference are analyzed. The results show that the buildup factor data of the double-layer materials calculated by Geant4 are relatively in good agreement with simulation results of the empirical formula. And most of the deviations among them are within 10%, which verifies the reliability of the calculation results of the buildup factors for the double-layer materials by Geant4. The work of this paper can provide underlying data basis for the related simulation of radiation protection field.

Key words: buildup factor, Geant4, double layer medium, point-kernel integral, exposure

CLC Number: 

  • TL72