Evaluation of the gamma-ray spectrum transmitted upon alteration in scintillator shading

Abstract

This paper deals with determining the properties of optical fibres required for transmitting energy spectra in ionising radiation measurements by scintillation. Specifically, optical fibres that provide the communication link between the scintillator and the photosensitive electronic devices. The primary objective is focused on the basic diameter and numerical aperture values required for efficient transmission of energy spectra. An iris mechanism gradually shaded the scintillator crystal, simulating the optical fibre diameter. The results can be used to calculate the numerical aperture to achieve this goal. This way, we can establish basic properties for further energy spectra measurements with optical fibres.