基于半经验法多球中子谱仪校准

Abstract

Abstract: A new method for calibrating Bonner Sphere Spectrometer by using semi-empirical method to deduct neutron scattering background was proposed. The detection efficiency of the He-3 proportional counters in each neutron sphere of Bonner Sphere Spectrometer was calibrated by using a thermal neutron reference radiation device. The reference ²⁴¹Am-Be neutron source was measured separately by each neutron sphere of the Bonner Sphere Spectrometer, and the fluence response of each neutron sphere was given by using the semi-empirical method to deduct the scattering. Combining the results of two experiments, the energy spectrum of ²⁴¹Am-Be neutron field was obtained and the fluence calibration factor of the spectrometer was given. The results also verify the ability of calibrated Bonner Sphere Spectrometer to measure fast neutron field.

Key words: Bonner Sphere Spectrometer, calibration, neutron energy spectrum, semi-empirical method

CLC Number:

TL817

SUN Bowen, ZENG Zhi, ZHANG Hui, MA Hao, LI Junli. Calibration of Bonner Sphere Spectrometer using semi-empirical method[J].RADIATION PROTECTION, 2024, 44(2): 120-125.

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Calibration of Bonner Sphere Spectrometer using semi-empirical method

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