高速中性子計測用ZnS系Scintillatorの研究
1958 年 27 巻 1 号 p. 38-41
詳細
1958 年 27 巻 1 号 p. 38-41
As ZnS(Ag) -paraffin scintillator is known to be suitable for the measurement of fast neutron under high background of γ-rays, investigations are, Made on the following details of -the scintillator: (a) rise time and decay time of scintillation, (b) influence of scintillator -thickness, (c) influence of ZnS-paraffin mixing ratio upon the pulse height distribution.
The scintillator thickness between 1.3 and 4mm give no difference on the pulse height .distribution. The optimum mixing ratio of ZnS: paraffin is found to lie between 1 and 2. In observed samples, ZnS(Ag) for the radar tube proved to have best characteristics. Contraryto the photoluminescence, the decay of ZnS(Cu) is so rapid that it is nearly comparable to -that of ZnS-(Ag), being about 1μ sec for neutrons and 0.2μ sec for γ-rays.
