Design and Fabrication of Metal/Dielectric Multi-layers for the Suppression of Slow Scintillation Component of BaF_2

The fastest inorganic scintillators--BaF2 has f as t and slow scintillation components. The intensity of the slow scintillation com ponent is 4～6 times higher than that of fast one, so tremendous signal pileup i s ineluctable under the condition of high counting rate. In order to enhance the fastslow ratio in the scintillation spectrum of BaF2, a metal/dielectric mu ltilayer is designed and fabricated to suppress the slow scintillation compone nt by taking full advantage of the property that the fast and slow components ar e in different wavelength regions. The experimental result shows that the multi layers can enhance the fastslow ratio very much, γradiation damage tests with total doses of 0.1 MGy show a small effect on the multilayers.