TY - JOUR
T1 - Comparative study on fluorescence decay time of doped ZnO crystals under α and β excitation
AU - Chen, Liang
AU - Ruan, Jinlu
AU - Xu, Mengxuan
AU - He, Shiyi
AU - Hu, Jing
AU - Zhang, Zhongbing
AU - Liu, Jinliang
AU - Ouyang, Xiaoping
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/7/21
Y1 - 2019/7/21
N2 - To acquire the direct time response of ZnO crystals to high energy particles, a dual-channels single photon correlation (DCSPC) system based on the measurement of the autocorrelation function of the fluoresce temporal profile was employed. The measuring resolution of the DCSPC system calibrated by Cerenkov luminescence is 46 ps. With this DCSPC system, the fast decay time constants of ZnO:Ga, ZnO:In and ZnO:Sc under charged particle alpha and beta excitation were successfully measured, which are 1.56 ns, 0.48 ns, 0.12 ns, and 1.11 ns, 0.40 ns, 0.10 ns, respectively. For all the three samples, it is found that the decay time constants under beta excitation are faster than those under alpha excitation, indicating that ZnO crystal is a fast scintillation material with pulse shape discrimination (PSD) ability. This would be applied in selective detection of mixed radiation field, particularly where high counting rate is required.
AB - To acquire the direct time response of ZnO crystals to high energy particles, a dual-channels single photon correlation (DCSPC) system based on the measurement of the autocorrelation function of the fluoresce temporal profile was employed. The measuring resolution of the DCSPC system calibrated by Cerenkov luminescence is 46 ps. With this DCSPC system, the fast decay time constants of ZnO:Ga, ZnO:In and ZnO:Sc under charged particle alpha and beta excitation were successfully measured, which are 1.56 ns, 0.48 ns, 0.12 ns, and 1.11 ns, 0.40 ns, 0.10 ns, respectively. For all the three samples, it is found that the decay time constants under beta excitation are faster than those under alpha excitation, indicating that ZnO crystal is a fast scintillation material with pulse shape discrimination (PSD) ability. This would be applied in selective detection of mixed radiation field, particularly where high counting rate is required.
KW - Dual-channels single photon correlation (DCSPC) system
KW - Fluorescence decay time
KW - Time response
KW - ZnO crystals
UR - https://www.scopus.com/pages/publications/85065040928
U2 - 10.1016/j.nima.2019.04.095
DO - 10.1016/j.nima.2019.04.095
M3 - 文章
AN - SCOPUS:85065040928
SN - 0168-9002
VL - 933
SP - 71
EP - 74
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ER -