Time-of-Flight Measurements for Low-Energy Components of 45-MeV Quasi-Monoenergetic High-Energy Neutron Field from ${^7{\rm Li}({\rm p}, {\rm n})}$
| Autor: | Jun Nishiyama, Tetsuro Matsumoto, Yasuhiro Unno, H. Seito, Masayuki Hagiwara, Sho Nishino, Yoshiaki Shikaze, Akihiko Masuda, S. Kurashima, Michio Yoshizawa, Yoshihiko Tanimura, Hideki Harano, Hiroshi Yoshitomi |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Nuclear and High Energy Physics Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory Physics::Medical Physics Liquid scintillation counting Cyclotron Detector Scintillator Fluence law.invention Nuclear physics Time of flight Nuclear Energy and Engineering law Neutron detection Neutron Electrical and Electronic Engineering Nuclear Experiment |
| Zdroj: | IEEE Transactions on Nuclear Science. 62:1295-1300 |
| ISSN: | 1558-1578 0018-9499 |
| DOI: | 10.1109/tns.2015.2432273 |
| Popis: | A quasi-monoenergetic neutron field generated in the ${^7{\rm Li}({\rm p}, {\rm n})}$ reaction consists of a high-energy monoenergetic peak and a continuum to the low-energy region. In this study, the spectral fluence of the continuum was measured with the time-of-flight (TOF) method using a ${^6{\rm Li}}$ -glass scintillation detector and an organic liquid scintillation detector for the keV and MeV region, respectively. The neutron spectral fluence was determined down to the keV region by implementing a new beam chopping system and the results showed that the neutrons that came directly from the target had a lower energy limit about 100 keV. Discussions were made also on the effect of the time-independent neutrons which are assumed to be room-scattered neutrons. The obtained information is expected to contribute to understanding the quasi-monoenergetic high-energy neutron field and improvements of calibrating neutron detectors in the field. |
| Databáze: | OpenAIRE |
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