Two-dimensional neutron imaging method using scintillators with wavelength shifting fibers

被引:2
作者
Toh, K
Katagiri, M
Sakasai, K
Matsubayashi, M
Birumachi, A
Takahashi, H
Nakazawa, M
机构
[1] Japan Atom Energy Res Ctr, Res Grp Pulsed Neutron Imaging, Adv Sci Res Inst, Tokai, Ibaraki 3191112, Japan
[2] Univ Tokyo, Bunkyo Ku, Tokyo 1138656, Japan
关键词
neutron; imaging; scintillator; wavelength shifting fiber; coincidence;
D O I
10.1016/S0168-9002(01)02072-1
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We have developed a two-dimensional neutron imaging method using rectangular scintillators with wavelength shifting (WLS) fibers for neutron scattering experiments using a next-generation high-intense pulsed-neutron source. In the method, rectangular scintillators are arranged at longitudinal direction and transverse direction and WLS fibers are arranged on the four sides of these scintillators. Luminescences generated in the scintillator are absorbed by the four fibers and wavelength-shifted luminescences are detected by multi-anode photomultipliers. The position of incident neutron is decided by coincidence of the four signals. By preliminary experiments using 5 min x 5 mm x 2 mm(t) Li-6 glass scintillators and 0.5mmcircle divide WLS fibers, it was concluded that detection efficiency for thermal neutron was 13%. By scanning experiment using a 4 x 4 Li-6 glass scintillator array neutron detection system, we obtained the clear spot of incident neutron beam that the cross talk was <10%. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:571 / 575
页数:5
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