Work

Pb-210 in volume samples: self-attenuation and scattering problems

Year: 2025

Type: article

Abstract: In this work we study the effect of the matrix of the source on the spectrum and on the full energy peak efficiency for low energy photons. Using realistic simulations carried out with PENELOPE 2018, including detector resolution, we show that small angle Compton scattering does contribute to the peak count rate, implying the dependence of the matrix effects on the linear attenuation coefficient μ and also on the scattering cross section. We show that the effect of Compton scattering can be removed from the apparent peak, resulting a "clean" peak depending only on μ. We apply the procedure for the evaluation of μ on the basis of uncollimated transmission measurements and subsequently use it for the calculation of self-attenuation corrections. We analyze measurements carried out in IFIN-HH in the context of an intercomparison exercise.

Source: Applied Radiation and Isotopes

DOI: 10.1016/j.apradiso.2025.112165

Authors: Octavian Sima, Daniela Gurau

Institutions: University of Bucharest, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering

Language: English

Topic: Radioactive Decay and Measurement Techniques

Subfield: Radiation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,220

Funder: Consiliul National pentru Dezvoltare si Inovare