| Issue |
EPJ Web Conf.
Volume 253, 2021
ANIMMA 2021 – Advancements in Nuclear Instrumentation Measurement Methods and their Applications
|
|
|---|---|---|
| Article Number | 11004 | |
| Number of page(s) | 7 | |
| Section | Current Trends in Development of Radiation Detectors | |
| DOI | https://doi.org/10.1051/epjconf/202125311004 | |
| Published online | 19 November 2021 | |
https://doi.org/10.1051/epjconf/202125311004
The effect of the aging of liquid organic scintillators used for gamma-neutron separation
1
University of Defence, NBC Defence Institute, Vyškov, Czech Republic
2
University of Defence, Faculty of Military Technology, Department of Mathematics and Physics, Brno, Czech Republic
Corresponding author: jiri.janda@unob.cz
Published online: 19 November 2021
Since the beginning of using liquid scintillators for gamma-neutron separation, there have been many articles dealing with long-term degradation especially due to oxygen presented during scintillator encapsulation. The effect of aging of liquid organic scintillators namely EJ301, EJ309 (both Eljen Technology), and new custom-made cocktails based on 1-Phenyl-3-(2,4,6-trimethylphenyl)-2-pyrazoline and 2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene fluors were investigated for more than half a year. The research was focused on the Compton edge shifting of gamma particles since the position is proportional to the light yield of the selected scintillator. Furthermore, the gamma-neutron separation was observed and quantified using FOM (Figure Of Merit) for samples prepared and filled under normal and nitrogen atmosphere during the mentioned period. All stated parameters of liquid scintillator NE213 manufactured by Nuclear Enterprises Limited opened more than three decades ago were measured and used for comparison.
Key words: liquid organic scintillator / γ-n discrimination / long-term stability / scintillator aging
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.