DocumentCode :
88559
Title :
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})} Reaction
Author :
Masuda, A. ; Matsumoto, T. ; Harano, H. ; Tanimura, Y. ; Shikaze, Y. ; Yoshitomi, H. ; Nishino, S. ; Kurashima, S. ; Hagiwara, M. ; Unno, Y. ; Nishiyama, J. ; Yoshizawa, M. ; Seito, H.
Author_Institution :
Nat. Metrol. Inst. of Japan, Nat. Inst. of Adv. Ind. Sci. & Technol. (NMIJ/AIST), Tsukuba, Japan
Volume :
62
Issue :
3
fYear :
2015
fDate :
Jun-15
Firstpage :
1295
Lastpage :
1300
Abstract :
A quasi-monoenergetic neutron field generated in the 7Li(p, 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 6Li-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.
Keywords :
neutron detection; proton-nucleus reactions; time of flight spectroscopy; 7Li(proton,neutron); beam chopping system; lithium-6-glass scintillation detector; neutron detectors; neutron spectral fluence; organic liquid scintillation detector; quasi-monoenergetic high-energy neutron field; room-scattered neutrons; time-independent neutrons; time-of-flight measurements; time-of-flight method; Collimators; Cyclotrons; Detectors; Energy measurement; Liquids; Neutrons; Particle beams; High-energy neutrons; neutrons; quasi-monoenergetic neutron fields; spectrometry; time-of-flight method;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.2015.2432273
Filename :
7117468
Link To Document :
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