Investigation of the Behavior of Plate and Rod Plastic Scintillator Detectors in Source Positioning Based on Energy Spectrum Analysis

Kochakpour, Javad; Hosseini,, Seyed Abolfazl; Taheri, Ali; Askari, Mojtaba

doi:10.24200/nst.2025.1790.2101

Investigation of the Behavior of Plate and Rod Plastic Scintillator Detectors in Source Positioning Based on Energy Spectrum Analysis

Articles in Press

Document Type : Research Paper

Authors

javad kochakpour ¹

Seyed Abolfazl Hosseini, ²

Ali Taheri ³

Mojtaba Askari ⁴

¹ nstri/sharif university

² Department of Energy Engineering, Sharif University of Technology

³ Radiation Applications Research School, Nuclear Science and Technology Research Institute, P.O. Box:14155-1339 Tehran, Iran

⁴ Nuclear science and technology research institute

https://doi.org/10.24200/nst.2025.1790.2101

Abstract

Abstract: The aim of this study is to analyze and compare the spectral and spatial characteristics of plastic rod and plate detectors. In this context, the variations in the FWHM at the Compton edge of the energy spectrum at different source positions for both types of detectors were investigated. For this purpose, the energy spectra of the detectors were recorded at various source positions and analyzed separately. The dimensions of the rod detector were 5 × 50 cm, and the dimensions of the plate detector were 50 × 5 × 50 cm. The results show that as the distance between the source and the detector increases, the FWHM increases in both types of detectors; however, the change is more pronounced in the rod detector compared to the plate one. These differences are attributed to the geometric characteristics and photon scattering behavior in each detector. Furthermore, the results indicate that the rod detector have higher spatial resolution. These features could be useful in optimizing the geometric design of detectors for applications such as nuclear imaging, industrial tomography, and others.

Keywords

Position-Sensitive Detector

Large Plastic Scintillator

Energy spectrum

Compton Scattering

Main Subjects