Study on performance of Yttrium doped BaF2 scintillation detector [掺钇BaF2闪烁探测器性能研究]

作者：Wang H.; Liu F.; Wang Y.; Chen J.; Kuang P.; Zhang P.; Yu R.; Cao X.^*; Li Y.; Wang B.

来源：Nuclear Techniques, 2020, 43(3): 030401.

DOI：10.11889/j.0253-3219.2020.hjs.43.030401

• Energy/time resolution
• High intensity γ-ray
• Pileup
• Scintillation detector
• Yttrium doped BaF2 crystal

[Background] BaF2 scintillation detector is commonly used in low intensity γ-ray detection experiments, and it is easy to pileup during high intensity γ-ray detection. [Purpose] This study aims to investigate the performance of Yttrium doped BaF2 (Yttrium doped with 1 at%, atomic percentage) scintillation detector with main concern of pileup and time resolution for high intensity γ-ray detection. [Methods] The energy resolution and time properties of Yttrium doped BaF2 (Yttrium doped with 1 at%) scintillation detector were experimentally tested by using 0.511 MeV γ-ray generated after positron annihilation from 22Na source. As a comparison, the normal BaF2 detector was also tested. [Results] The experimental results show that the ratio of fast and slow components of Yttrium doped BaF2 crystal (1:1.1) is much higher than that of BaF2 crystal (1:5), but the energy resolution of Yttrium doped BaF2 detector (38%) is worse than that of BaF2 detector (19%). For high intensity γ-ray detection, the Yttrium doped BaF2 detector have better time resolution than the BaF2 detector. [Conclusions] The decrease of the slow component in Yttrium doped BaF2 crystal can shorten the time width of the detector output signal, hence reduce the signals' pileup and improve the time resolution of the detector in high count rate environment.

• 单位
  郑州大学