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

MAJERLE, Mitja, ANSORGE, Martin, BÉM, Pavel, KOLIADKO, Daniil, MRÁZEK, Jaromír, NOVÁK, Jan, ŠIMEČKOVÁ, Eva, ŠTEFÁNIK, Milan, KOŠT’ÁL, Michal, MATĚJ, Zdeněk, CHOHAN, Haridev and WONG, Ocean (2023). Measurements of the neutron spectra from the p+Be neutron generator of the NPI CAS. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment: 168314.

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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 characterised 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.

Item Type: Article
Additional Information: ** Article version: AM ** Embargo end date: 31-12-9999 ** From Elsevier via Jisc Publications Router ** Licence for AM version of this article: This article is under embargo with an end date yet to be finalised. **Journal IDs: issn 01689002 **History: issued 26-04-2023; accepted 17-04-2023
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SWORD Depositor: Colin Knott
Depositing User: Colin Knott
Date Deposited: 02 May 2023 14:33
Last Modified: 20 Jun 2023 14:55

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