Application of a hybrid method for efficiency calibration of a NaI detector

K M El-Kourghly; W El-Gammal; M S El-Tahawy; M Abdelati; A Abdelsalam; W Osman

doi:10.1016/j.apradiso.2021.109632

Application of a hybrid method for efficiency calibration of a NaI detector

Appl Radiat Isot. 2021 May:171:109632. doi: 10.1016/j.apradiso.2021.109632. Epub 2021 Feb 19.

Authors

K M El-Kourghly¹, W El-Gammal², M S El-Tahawy², M Abdelati², A Abdelsalam³, W Osman³

Affiliations

¹ Nuclear Safeguards and Physical Protection Department, Egyptian Nuclear and Radiological Regulatory Authority (ENRRA), Cairo, Egypt. Electronic address: eaea_nsncrc@yahoo.com.
² Nuclear Safeguards and Physical Protection Department, Egyptian Nuclear and Radiological Regulatory Authority (ENRRA), Cairo, Egypt.
³ Physics Department, Faculty of Science, Cairo University, Giza, Egypt.

PMID: 33636440
DOI: 10.1016/j.apradiso.2021.109632

Abstract

A previously proposed hybrid analytical-numerical method for efficiency calibration of a NaI detector for a point γ-source is extended and applied for other shapes of sources. The shapes include line, disk, and cylindrical sources of various dimensions and locations with respect to the right circular cylindrical NaI detector. The results obtained by this method have been evaluated through comparison with Monte Carlo (MC) calculations. A relative maximum difference of 3.5% is found between the two methods.

Keywords: Analytical method; Monte Carlo; Peak efficiency; Scintillators; Total efficiency; γ-sources.