Sensitivity of plastic scintillating fiber optic for X and γ radiation, a simulation study

Abstract

This article introduces and gives the basic performance characteristics of an optical fiber radiation sensing system. Some fundamental characteristics of plastic scintillating fiber (PSF) for electromagnetic radiation (X- and γ-ray) in the energy range of 10–400 keV, are studied by using Geant4 simulation package. The main advantages of PSFs are their fast response, flexibility, and electromagnetic immunity. The PSF could be used as a nuclear radiation sensor or a detector for monitoring and imaging purposes. It is shown that the sensitivity of the PSF in low energy is good enough to use it as a pixel of imaging detector. In order to find quantum efficiency (QE), the energy deposition in fiber, the absorption, conversion, as well as the transfer efficiency is simulated.