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

被引：4

作者：

Majerle, Mitja ^{[1
]}

Ansorge, Martin ^{[1
]}

Bem, Pavel ^{[1
]}

Koliadko, Daniil ^{[1
]}

Mrazek, Jaromir ^{[1
]}

Novak, Jan ^{[1
]}

Simeckova, Eva ^{[1
]}

Stefanik, Milan ^{[1
]}

Kostal, Michal ^{[2
]}

Matej, Zdenek ^{[3
]}

Chohan, Haridev ^{[4
]}

Wong, Ocean ^{[4
,5
]}

机构：

[1] CAS, Nucl Phys Inst, Prague 25068, Czech Republic

[2] Res Ctr Rez, Prague 25068, Czech Republic

[3] Univ Def, Kounicova 65, Brno 61200, Czech Republic

[4] United Kingdom Atom Energy Author, Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England

[5] Sheffield Hallam Univ, Howard St, Sheffield S1 1WB, England

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2023年 / 1053卷

关键词：

Fast neutron generator; Neutron spectrum measurement; Organic scintillator; Time-of-flight; Unfolding; RADIATION-DAMAGE; NUCLEAR-SCIENCE; DATA LIBRARY; DETECTORS;

D O I：

10.1016/j.nima.2023.168314

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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.

引用

页数：9

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