The Long-term Stability of Liquid Organic Scintillators Used for Gamma-neutron Separation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG45__%2F23%3A00557235" target="_blank" >RIV/60162694:G45__/23:00557235 - isvavai.cz</a>
Result on the web
<a href="http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=23" target="_blank" >http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=23</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TNS.2021.3111635" target="_blank" >10.1109/TNS.2021.3111635</a>
Alternative languages
Result language
angličtina
Original language name
The Long-term Stability of Liquid Organic Scintillators Used for Gamma-neutron Separation
Original language 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 dissolved in the cocktail or presented during scintillator encapsulation. Oxygen is a well-known quenching agent causing a significant reduction of light yield. 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 luminophores 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. It was proven that all investigated cocktails suffered from different deterioration of the light yield in the investigated period, especially those containing a low concentration of luminophore. On the other hand, the gamma-neutron separation was improving up to the 100th day of measurement. 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. It was observed that even after 30 years, this cocktail was still able to discriminate gammas from neutrons.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20305 - Nuclear related engineering; (nuclear physics to be 1.3);
Result continuities
Project
<a href="/en/project/LTAUSA18198" target="_blank" >LTAUSA18198: ADAR - Accelerator Driven Advanced Reactor</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE Transactions on Nuclear Science
ISSN
0018-9499
e-ISSN
1558-1578
Volume of the periodical
69
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
768-776
UT code for WoS article
000803113800026
EID of the result in the Scopus database
2-s2.0-85114743021