Optimisation of light output from zinc sulphide scintillators for fast neutron radiography
被引:14
作者:
Rahmanian, H
论文数: 0引用数: 0
h-index: 0
机构:
Univ Witwatersrand, Dept Phys, Schonland Res Ctr, ZA-2050 Wits, Johannesburg, South AfricaUniv Witwatersrand, Dept Phys, Schonland Res Ctr, ZA-2050 Wits, Johannesburg, South Africa
Rahmanian, H
[1
]
Watterson, JIW
论文数: 0引用数: 0
h-index: 0
机构:
Univ Witwatersrand, Dept Phys, Schonland Res Ctr, ZA-2050 Wits, Johannesburg, South AfricaUniv Witwatersrand, Dept Phys, Schonland Res Ctr, ZA-2050 Wits, Johannesburg, South Africa
Watterson, JIW
[1
]
机构:
[1] Univ Witwatersrand, Dept Phys, Schonland Res Ctr, ZA-2050 Wits, Johannesburg, South Africa
fast neutron radiography;
imaging scintillator;
ZnS(Ag) based scintillator;
quantum efficiency;
proton recoil;
light output;
D O I:
10.1016/S0168-583X(98)00052-4
中图分类号:
TH7 [仪器、仪表];
学科分类号:
0804 ;
080401 ;
081102 ;
摘要:
Fast neutron radiography (FNA) is a promising new application for small accelerators. The potential effectiveness of this technique depends on the development of suitable imaging detectors for fast neutrons. Zinc sulphide based scintillators have the largest light output per event in the family of imaging scintillators used so far in fast neutron radiography. but zinc sulphide is not transparent to its own light. This paper investigates different aspects of this scintillator in order to establish the factors affecting the light output, Zinc sulphide screens were prepared by suspending ZnS(Ag) particles at different concentration in a hydrogen rich matrix. The light output of these scintillators have been tested in fast neutron fields generated by the Li-7(p,n)Be-7 and D(d,n)He-3 reactions. The light output was detected using a CCD camera coupled to the scintillator screen by an optical fiber through an image intensifier. The results are presented in the form of graphs for different sets of particle sizes and concentrations. A comparison has been made with a simple theoretical model. (C) 1998 Elsevier Science B.V.