MC Simulates the Detection Efficiency of Different Sizes of BaClBr(Eu)

Abstract

The performance of a new BaClBr(Eu) scintillator discovered in recent years was studied. The photon yield and detection efficiency of different sizes of the theoretical model of the BaClBr(Eu) detector were calculated by the MCNP program, and compared with the traditional NaCl(Tl) detector. Studies have found that the detection efficiency of the scintillator detector increases as the size of the scintillator increases. When the γ-ray energy is 662 KeV, the photon yield of the BaClBr(Eu) detector is lower than that of the NaCl(Tl) detector, and the light yield difference is 6.21% - 3.15%. The detection efficiency of BaClBr(Eu) scintillator is higher than that of NaCl(Tl) scintillator, and the relative efficiency is 11.7% - 22.52%. Simulating the effect of different ray energy on the photon yield and detection efficiency of the scintillator under the same crystal size, it is found that the photon yield of the BaClBr(Eu) scintillator is between the NaCl(Tl) and CsI(Tl) scintillator detectors. The detection efficiency of low-energy rays is close to that of NaCl(Tl), and the detection efficiency of high-energy rays is much higher than that of NaCl(Tl). The detection efficiency of the high and low ray energy range is close to that of the CsI(Tl) detector.