21-25 June 2021
Clarion Congress Hotel Prague
Europe/Prague timezone
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The effect of the aging of liquid organic scintillators used for gamma-neutron separation

Not scheduled
20m
3rd floor (Clarion Congress Hotel Prague)

3rd floor

Clarion Congress Hotel Prague

Freyova 945/33, 190 00 Prague 9 - Vysočany
Poster 11 Current Trends in Development of Radiation Detectors

Speaker

Dr JANDA, Jiří (University of Defence in Brno)

Description

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 EJ 301, EJ309 (both Eljen Technology), and new house-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 NE 213 manufactured by Nuclear Enterprises Limited opened more than three decades ago were measured and used for comparison.

Primary authors

Dr JANDA, Jiří (University of Defence in Brno) JÁNSKÝ, Jaroslav (Univerzita Obrany) Prof. CVACHOVEC, František (University of Defence in Brno) Dr VĚRA, Mazánková (University of Defence in Brno)

Presentation Materials

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