Pages: 283-293

Authors: Yixin Liu, Song Zhang, Yikun Qian, Yuchen Huang, Benjiang Mao, Peng Feng, and Zhiqiang Chen

Abstract

In order to study the feasibility of using lightweight ²⁴¹Am-Be radionuclide reference neutron radiation field for the calibration of neutron measurement instruments, this paper reported the Monte Carlo simulation work on free field reference neutron radiation, standard reference neutron radiation regulated by ISO-8529 series standards and minitype reference neutron radiation we designed. The distributions of dose equivalent rates and neutron energy spectrum in different conditions, such as different room types, different room sizes and different shield materials were the main simulation contents for analyzing the characteristics of the three types of reference neutron radiation. According to the simulation results, theoretical supports were provided for the discussion on the minitype reference neutron radiation for calibration purpose.

Key words: Monte Carlo, ²⁴¹Am-Be radionuclide source, reference neutron radiation, neutron energy spectrum, dose equivalent rate

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