Measurements of the neutron spectra from the p+Be neutron generator of the NPI CAS

0575276 - ÚJF 2024 RIV NL eng J - Článek v odborném periodiku
Majerle, Mitja - Ansorge, Martin - Bém, Pavel - Koliadko, Daniil - Mrázek, Jaromír - Novák, Jan - Šimečková, Eva - Štefánik, Milan - Košťál, M. - Matěj, Z. - Chohan, H. - Wong, O.
Measurements of the neutron spectra from the p+Be neutron generator of the NPI CAS.
Nuclear Instruments & Methods in Physics Research Section A. Roč. 1053, AUG (2023), č. článku 168314. ISSN 0168-9002. E-ISSN 1872-9576
Grant CEP: GA MŠMT EF16_013/0001812; GA MŠMT(CZ) 9D22001
GRANT EU: European Commission(BE) 101052200
Výzkumná infrastruktura: e-INFRA CZ II - 90254
Institucionální podpora: RVO:61389005
Klíčová slova: Fast neutron generator * Neutron spectrum measurement * Organic scintillator * Time-of-flight * Unfolding
Obor OECD: Nuclear related engineering
Impakt faktor: 1.4, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.nima.2023.168314

The Nuclear Physics Institute of the Czech Academy of Sciences (NPI CAS) operates several neutron sources, including a generator of a continuous spectrum of neutrons up to 33 MeV. Accelerated protons from the U-120M cyclotron are directed to an 8 mm thick beryllium target to produce the neutrons.In this work, the neutron spectrum at distances of 3-8 m was directly measured with NE213 and stilbene scintillator detectors in the forward, diagonal and perpendicular directions. At a distance of 50 cm from the Be target, the neutron spectrum was validated with a gold activation detector. From previous work, the neutron spectra at close distances were characterized for use in high-intensity irradiation. Both the newly measured spectra at large distances and the previously measured spectrum were simulated using the Monte Carlo code, MCNP6.2, with ENDF7PROT and JENDL-4.0/HE nuclear data libraries. The comparison of the simulated and experimentally measured spectra revealed several limitations of both libraries.
Trvalý link: https://hdl.handle.net/11104/0345046