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@article{2273041,
author = {Jánský, Jaroslav and Janda, Jiří and Košťál, Michal and Matěj, Zdeněk and Bílý, Tomáš and Mazánková, Věra and Mravec, Filip and Cvachovec, František},
article_location = {SWITZERLAND},
article_number = {2},
doi = {http://dx.doi.org/10.3390/qubs6020018},
keywords = {neutron spectrometry; neutron discrimination; light output; organic scintillators; mono-energetic neutrons},
language = {eng},
issn = {2412-382X},
journal = {QUANTUM BEAM SCIENCE},
title = {Response to Mono-Energetic Neutrons and Light Output Function for Liquid Organic Scintillators PYR5/DIPN and THIO5/DIPN},
url = {https://www.mdpi.com/2412-382X/6/2/18},
volume = {6},
year = {2022}
}
TY - JOUR
ID - 2273041
AU - Jánský, Jaroslav - Janda, Jiří - Košťál, Michal - Matěj, Zdeněk - Bílý, Tomáš - Mazánková, Věra - Mravec, Filip - Cvachovec, František
PY - 2022
TI - Response to Mono-Energetic Neutrons and Light Output Function for Liquid Organic Scintillators PYR5/DIPN and THIO5/DIPN
JF - QUANTUM BEAM SCIENCE
VL - 6
IS - 2
SP - 1-7
EP - 1-7
PB - MDPI
SN - 2412382X
KW - neutron spectrometry
KW - neutron discrimination
KW - light output
KW - organic scintillators
KW - mono-energetic neutrons
UR - https://www.mdpi.com/2412-382X/6/2/18
N2 - Liquid organic scintillators are important devices for measurements of neutron radiation. Currently, large-scale liquid organic scintillators have capabilities of detecting neutrons, but the determination of the neutron energy spectra is a challenge. This work aims to measure the responses of two liquid two-component scintillators to mono-energetic neutron radiation and to determine their light output function, which is necessary for proper neutron energy spectra determination. Both scintillators are composed of the solvent di-iso-propyl-naphthalene (DIPN) mixed isomers. The first scintillator, labeled PYR5/DIPN, contains the luminophore 1-phenyl-3-(2,4,6-trimethylphenyl)-2-pyrazoline with a concentration of 5 g/L. The second scintillator labeled THIO5/DIPN contains the luminophore 2,5-bis(5-tert-butyl-benzoxazol-2-yl)thiophene also with a concentration of 5 g/L. The responses to neutron energies of 1.5 MeV, 2.5 MeV, and 19 MeV are measured at PTB in Braunschweig. The responses to neutron energies of 2.45 MeV and 14 MeV were measured at CTU in Prague using DD and DT reactions. The responses to a silicon filtered beam were measured at Research Centre Rez. The measurements were processed using a two-parameter spectrometric system NGA-01 to discriminate neutrons from gamma rays. The obtained responses are dominated by recoil protons from elastic collisions of neutrons with hydrogen atoms. The edge of the response of recoil protons gives information about the light output of neutrons, compared to gamma rays for the same radiation energy. The light output function for protons in the PYR5/DIPN scintillator is L(E-p) = 0.6294E(p) - 1.00(1 - exp(-0.4933E(p)(0.95))). The light output function for protons in the THIO5/DIPN scintillator is L (E-p) = 0.6323E(p) - 1.00(1 - exp(-0.4986E(p)(0.9883))). The light output functions well resemble the standard shape, and they are quite similar to each other. That suggests a weak influence of the luminophore on the light output function. The light output functions are ready to be incorporated to the response matrix for the neutron energy spectra determination.
ER -
JÁNSKÝ, Jaroslav, Jiří JANDA, Michal KOŠŤÁL, Zdeněk MATĚJ, Tomáš BÍLÝ, Věra MAZÁNKOVÁ, Filip MRAVEC a František CVACHOVEC. Response to Mono-Energetic Neutrons and Light Output Function for Liquid Organic Scintillators PYR5/DIPN and THIO5/DIPN. \textit{QUANTUM BEAM SCIENCE}. SWITZERLAND: MDPI, 2022, roč.~6, č.~2, s.~1-7. ISSN~2412-382X. Dostupné z: https://dx.doi.org/10.3390/qubs6020018.
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