Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (5): 50403-050403.doi: 10.11889/j.0253-3219.2016.hjs.39.050403

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Theoretical simulation and experimental research of the light output function of liquid scintillator EJ339A

WANG Tingting1, WANG Liang2, MO Zhaohong2, ZHAO Deshan2, XIONG Zhonghua2   

  1. 1. Science and Technology on Surface Physics and Chemistry Laboratory, China Academy of Engineering Physics, Jiangyou 621907, China;
    2. Institute of Material Research, China Academy of Engineering Physics, Mianyang 621700, China
  • Received:2015-10-15 Revised:2016-03-15 Online:2016-05-10 Published:2016-05-12

Abstract:

Background: The light output function is an elementary aspect for neutron spectrometry measured by an organic scintillator to unfold the neutron spectrum from the pulse height distribution. Purpose: This paper aims to investigate the properties of a boron-loaded liquid scintillator EJ339A, using photon sources and neutrons from a 252Cf source. Methods: The light output was defined using Compton electron spectra. Pulse shape discrimination(PSD) and time of flight(TOF) were used to distinguish neutron and γ-rays. Combining theoretical modeling and experimental research, four different gamma sources are applied to achieve equivalent calibration of electronic energy, namely 22Na, 133Ba, 137Cs, and 60Co, respectively. Accordingly, based on TOF method, 252Cf, a spontaneous fission neutron source, is treated as several quasi-monoenergetic neutron sources under different time-windows. Results: The electron light output scale was calibrated by the measured detector response. Neutrons deposit energy in the detector and give a light output function with the neutron energy in the range of 1.9?7.8MeV. Conclusion: It shows that experimental data of light output function are in good agreement with simulation result in the low energy section, while discrepancies arise in the high energy section.

Key words: Liquid scintillator, Light output function, Energy calibration

CLC Number: 

  • TL812+.2