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The simulation results of the timing properties of a plastic scintillator are reported, when it is read by the WLS fiber. For the sake of completeness, we are beforehand with a simplified formula describing the light propagation in a fiber, and thereafter present the simulation results as the distributions for t1-t0 as well as t1+t2 to see the time resolution with t1 and t2 the times appeared at both...
The light yield (LY) of a wavelength shifter (WLS) fiber embedded in a plastic scintillator plate was studied by the MC simulation using the Mathematica package to find its optimum length and fiber density in the shashlik mode. It was identified whether or not the light absorbed in a fiber has been once reflected at any surface. The partial LY with reflections at upper and lower surfaces as well as...
A new method of finding the DOI for the PET/PEM device is proposed. The idea behind this is based on the conventional position finding method utilizing the light attenuation in a piece of scintillator. Stronger dependence of the signal pulse height along the scintillator length is more favorable without much degrading the energy resolution, and this can be realized by the present idea. To verify the...
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