Affiliation:
1. Xi’an Jiaotong University, Xi’an 710049, China
Abstract
To address the problem that the energy response of the plastic scintillator detector is very low in the low energy range, this paper proposes a method to optimize the energy response characteristics by combining the CaWO4 energy compensation layer and the genetic algorithm. First, the energy deposition of X/γ rays in a plastic scintillator with a CaWO4 energy compensation layer is modeled and simulated using MCNP software; then, the thickness and hollow radius of the compensation layer are optimized by using genetic algorithm to run this simulation program. The results show that after adding a CaWO4 compensation layer with a thickness of 45 µm and a hollow radius of 1 cm at the front of the plastic scintillator, its energy response characteristics are consistent in the range of 50 keV to 1.5 MeV, which meets the requirement of IEC 61584:2001 for the energy response coefficient less than ±30%. The maximum deviation of the energy response coefficient at the energy point of 0.662 MeV is reduced from 44% to 13%.
Subject
General Physics and Astronomy
Cited by
2 articles.
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