Study of unfolded gamma spectra by using EJ309 liquid scintillator detector

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2021-08, Vol.1006, p.165407, Article 165407
• Main Authors: Zhang, Shuangjiao, Liu, Changqi, Yang, Xu, Huang, Chang, Xie, Qin, Hu, Zhijie, Hu, Zhiming, Han, Chao, Bai, Xiaohou, Huo, Dongying, Wu, Kang, Wang, Junrun, Zhang, Yu, Wei, Zheng, Yao, Zeen
• Format: Article
• Language: English
• Subjects: Gamma spectrum; Liquid scintillator detector; Monte Carlo simulation; Unfolding calculation
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2021.165407

The EJ309 liquid scintillator detector and the developed gamma spectrum unfolding procedure are used to study the complex gamma spectra. The EJ309 liquid scintillator detector is calibrated by using measured response functions of the standard gamma sources 133Ba, 137Cs, and 60Co, which are verified by Monte Carlo simulations for detector calibration accuracy. A gamma spectra unfolding procedure is developed based on the One-fold Gold algorithm, which is used for unfolding simulated complex gamma spectra, experimentally measured response function of 133Ba and 137Cs, and composed complex gamma spectra using measured response function of 133Ba and 137Cs with different relative intensities (RI). The data of unfolded gamma-ray spectra are compared with the standard data. The results show that the EJ309 liquid scintillator detector and the developed gamma spectra unfolding procedure can quantitative and qualitative analysis of complex gamma spectra with reasonable accuracy. •Gamma spectrum analysis based on the EJ309 liquid scintillator detector is studied.•An unfolding program of gamma spectra has been developed.•The unfolding results were in good agreement with the standard data of gamma-rays.•This work can obtain the energy and relative intensity of gamma-rays.•This work can provide the basis for obtaining gamma radionuclide information.