Correction for neutron self-shielding and gamma-ray self-absorption in prompt-gamma activation analysis for large and irregularly shaped samples. Issue 1 (11th November 2020)

• Record Type: Journal Article
• Authors: Szentmiklósi, László; Kis, Zoltán; Maróti, Boglárka; Horváth, László Zoltán
• Is Part Of: Journal of analytical atomic spectrometry. Volume 36:Issue 1(2021)
• Page Start: 103
• Page End: 110
• Publication Date: 2020-11-11
• Subjects: Atomic spectra -- Periodicals; Atomic absorption spectroscopy -- Periodicals; 543.0858
• DOI: 10.1039/d0ja00364f
• Languages: English
• ISSNs: 0267-9477

Abstract

Abstract : Prompt-gamma activation analysis (PGAA) has been extended and validated to measure large and irregularly shaped samples. The detailed sample geometry was implemented in the MCNP-model of the setup and accurate matrix-effect corrections were obtained. Abstract : Prompt-gamma activation analysis (PGAA) is a useful method to determine the elemental composition of bulky samples, where non-destructivity, representativity, and high metrological quality are of great importance. Voluminous samples significantly attenuate both the exciting neutron beam and the emerging gamma radiation within the sample. We have developed a generally applicable correction for the neutron self-shielding and gamma-ray self-absorption effect for large and irregularly shaped samples, based on digital geometry data and Monte Carlo simulations. The numerical correction gives results that agree well with those from destructive sampling.