Characterization of 2"x 2"LaBr3(Ce) scintillators for fast-timing spectroscopy

被引：0
|
作者：
Sahoo, Dhananjaya [1 ]
Madhu [1 ]
Deo, A. Y. [1 ]
Yashraj [2 ]
Ghosh, U. S. [2 ]
Bala, Indu [2 ]
Singh, R. P. [2 ]
Yadav, Prince Raj [2 ]
Kumar, Mohit [2 ]
Jhingan, A. [2 ]
Jain, Mamta [2 ]
机构：
[1] Indian Inst Technol Roorkee, Dept Phys, Roorkee 247667, India
[2] Interuniv Accelerator Ctr, Aruna Asaf Ali Marg, New Delhi 110067, India
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2025年 / 1074卷
关键词：
LaBr3(Ce) scintillator; Hamamatsu R2083 PMT; Energy response; GEANT4; simulation; Time resolution; Constant Fraction Discriminator; TIME RESOLUTION; EXCITED-STATES; GAMMA; LIFETIMES; CRYSTALS; HPGE; DETECTORS; ARRAY; PS;
D O I：
10.1016/j.nima.2025.170308
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The present study primarily reports on the complete characterization of 2 '' x 2 '' LaBr3(Ce) scintillators coupled to fast Hamamatsu R2083 photomultiplier tubes (PMTs). The energy characteristics of the detector, such as linearity response, energy resolution, and intrinsic efficiency, are thoroughly investigated using standard radioactive sources (137Cs, 60Co, and 152Eu). The experimentally measured energy spectra and the intrinsic efficiency are compared with the GEANT4 simulations, indicating an overall good agreement between the measured and simulated results. In addition, the timing characteristics of the detectors are studied with a 60Co source. The time resolution is optimized by varying the PMT bias voltages and Constant Fraction Discriminator (CFD) delays. The best time resolution for an individual LaBr3(Ce) scintillator coupled to R2083 PMT is measured to be 243(2) ps for 1173-1332 keV gamma-ray energies. The measured time resolution is compared with the best values reported for different sizes of LaBr3(Ce) scintillators coupled to various PMTs.
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页数：8
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