RADIATION PROTECTION ›› 2023, Vol. 43 ›› Issue (S1): 1-7.

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Research on the influence of 56Fe evaluation cross section of different databases on shielding calculation

CHI Xiaomiao, HAN Yi, CHEN Faguo, MA Xiangyu, SHEN Huaya   

  1. China Institute for Radiation Protection, Taiyuan 030006
  • Received:2022-12-07 Online:2023-08-15 Published:2023-09-14

Abstract: 56Fe evaluation cross sections are still being updated at home and abroad. In order to evaluate the applicability and accuracy of 56Fe cross sections in various evaluation libraries and different versions of the same evaluation library in shielding calculation, this paper selects the FE DIA100 R150 benchmark with the evaluation the cross-section data quality of 56Fe in different evaluation libraries. And based on the CENDL-3.2 evaluation library, the sensitivity analysis of 56Fe stable isotopes was carried out, and the influence of key reaction channel sections of 56Fe on shielding calculation was studied. Some main conclusions are drawn as follows. 1) Due to the lack of accuracy of the elastic scattering cross section and inelastic scattering cross section of 56Fe, there are large differences between the calculated values of various evaluation libraries and the experimental measurements in the energy regions of 1.20-1.70 MeV and 10.00-17.00 MeV. 2) The (n, n) and (n, n′)d reaction cross-sections in 56Fe are the most sensitive factors to the influence of shielding calculations. 3) In CENDL-3.2, the cross section value of 56Fe(n, n) is higher than the real value in the energy region of 0.01-0.10 MeV.

Key words: 56Fe, shielding calculations, evaluation nuclear database, sensitivity analysis

CLC Number: 

  • TL328