Novel integral expressions for computing the full energy peak efficiency of gamma spectrometry systems

D Stanga; D Gurau

doi:10.1016/j.apradiso.2021.109689

Novel integral expressions for computing the full energy peak efficiency of gamma spectrometry systems

Appl Radiat Isot. 2021 Jun:172:109689. doi: 10.1016/j.apradiso.2021.109689. Epub 2021 Mar 16.

Authors

D Stanga¹, D Gurau²

Affiliations

¹ National Institute of R&D for Physics and Nuclear Engineering-Horia Hulubei (IFIN-HH), Bucharest-Magurele, P.O.Box MG-6, RO, 077125, Romania. Electronic address: doru@nipne.ro.
² National Institute of R&D for Physics and Nuclear Engineering-Horia Hulubei (IFIN-HH), Bucharest-Magurele, P.O.Box MG-6, RO, 077125, Romania.

PMID: 33756397
DOI: 10.1016/j.apradiso.2021.109689

Abstract

A new theoretical approach was developed for computing the FEP efficiency of HPGe and scintillation detectors using the concept of probability function. Thus integral expressions for the FEP efficiency were developed using three probability functions. Starting from the integral expression of the FEP efficiency and using integral means and Chebyshev functional, new expressions of the FEP efficiency, detector response, and self-attenuation factors were obtained. Also, the new approach provides new insights useful for gamma spectrometry measurements. Two practical applications of this approach are described.

Keywords: Full-energy peak efficiency; Gamma spectrometry; Monte Carlo method.