Two-dimensional neutron imaging method using scintillators with wavelength shifting fibers
Two-dimensional neutron imaging method using scintillators with wavelength shifting fibers
复制标题
使用波长移动光纤闪烁体的二维中子成像方法
DOI：
10.1016/s0168-9002(01)02072-1
复制
发表时间：
2002
影响因子：
1.4
通讯作者：
M. Nakazawa
中科院分区：
文献类型：
--
作者：
K. Toh;K. Toh;M. Katagiri;K. Sakasai;M. Matsubayashi;A. Birumachi;H. Takahashi;M. Nakazawa
我们开发了一种二维中子成像方法，利用波长移位（WLS）光纤的矩形闪烁体，用于下一代高强度脉冲中子源的中子散射实验。在该方法中，在纵向和横向设置矩形闪烁体，并在这些闪烁体的四面设置WLS光纤。在闪烁体中产生的发光被四根光纤吸收，并通过多阳极光电倍增管检测波长偏移的发光。入射中子的位置由四个信号的重合决定。利用5mm×5mm×2mmt6Li玻璃闪烁体和0.5mm∅WLS光纤进行初步实验，得出热中子探测效率为13%。利用4×46Li玻璃闪烁体阵列中子探测系统进行扫描实验，得到了入射中子束串扰<10%的清晰点。
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 5mm×5mm×2mmt6Li glass scintillators and 0.5mm∅ WLS fibers, it was concluded that detection efficiency for thermal neutron was 13%. By scanning experiment using a 4×46Li glass scintillator array neutron detection system, we obtained the clear spot of incident neutron beam that the cross talk was <10%.