Title

Study on the effect of the self-attenuation coefficient on γ-ray detector efficiency calculated at low and high energy regions

Document Type

Article

Abstract

The present work used the efficiency transfer method used to calculate the full energy peak efficiency (FEPE) curves of the (2"*2" & 3"*3") NaI (Tl) detectors based on the effective solid angle subtended between the source and the detector. The study covered the effect of the self attenuation coefficient of the source matrix (with a radius greater than the detector's radius) on the detector efficiency. 152 An Eu aqueous radioactive source covering the energy range from 121.78 keV up to 1408.01 keV was used. In this study an empirical formula was deduced to calculate the difference between the measured and the calculated efficiencies [without self attenuation] at low and high energy regions. A proper balance between the measured and calculated efficiencies [with self attenuation] was achieved with discrepancies less than 3%, while reaching 39% for calculating values [without self attenuation] due to working with large sources, or for low photon energies.

Publication Date

1-1-2014

Faculty

Faculty of Applied Health Sciences Technology

Subject Area

Physical Sciences, General Energy

Indexed in Scopus

yes

DOI

https://doi.org/10.5516/NET.04.2013.077

Volume

46

Keywords

Full Energy Peak Efficiency (FEPE), NaI (Tl) Detectors, New Empirical Formula and Efficiency Transfer Method, Self Attenuation Coefficient

ISSN

17385733

eISSN

2234358X

Link to Full Text

Share

COinS