Effects of the length variations of LYSO and plastic optical fiber on the energy spectrum responses of a fiber-optic radiation sensor

Abstract

A scintillating fiber-optic radiation sensor (SFORS) having the flexible and in-sertable characteristics was developed for remote gamma-ray energy spectroscopy in narrow places. As a small sensing element, a cerium-doped lutetium yttrium orthosilicate (LYSO) crystal was used considering the many advantages of the LYSO such as high density, high effective Z-number, high light output, and good energy resolution. Using the fabricated SFORS, we measured the inherent gamma-ray energy spectrum of a Co-60 and then analyzed the effects of the length variations of a LYSO crystal and a plastic optical fiber (POF) on the energy spectrum responses of the SFORS.