Experimental and Simulated Spectral Gamma-Ray Response of a NaI (Tl) Scintillation Detector used in Airborne Gamma-Ray Spectrometry

Abstract. 57 60 88 109 133 137 152Eu calibration point sources with known activities and source-detector geometries under laboratory conditions. In addition, empirical calibration and resolution functions were derived from these measurements combined with additional radiation measurements adopting natural uranium, thorium and potassium volume sources. The simulation results show superior accuracy and precision compared to previous AGRS simulation models with a median relative spectral error < 10 % for most of the radiation sources. Moreover, the implementation of a lower level discriminator model and detailed modelling of the laboratory result in a significant improvement in model accuracy for spectral energies < 100 keV compared to previous studies. Yet thorough statistical analysis incorporating statistical and systematic uncertainty estimates revealed statistically significant deviations between the simulated and measured spectra in the spectral region around the Compton edge, which could be attributed to the scintillator non-proportionality. These findings imply that the linear energy deposition model applied in this and previously developed AGRS simulation models should be revised and considered to be replaced by more accurate non-proportional models.

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch

Verweise und Beziehungen

• Erschienen in: Experimental and Simulated Spectral Gamma-Ray Response of a NaI (Tl) Scintillation Detector used in Airborne Gamma-Ray Spectrometry ; volume:57 ; year:2022 ; pages:89-107 ; extent:19 ; Advances in geosciences ; 57 (2022), 89-107 (gesamt 19)

Beteiligte, Orts- und Zeitangaben

• Urheber: Breitenmoser, David ; Butterweck, Gernot ; Kasprzak, Malgorzata Magdalena ; Yukihara, Eduardo Gardenali ; Mayer, Sabine

Weitere Informationen

• DOI: 10.5194/adgeo-57-89-2022
• URN: urn:nbn:de:101:1-2022063005235897472712
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 15.08.2025, 07:23 MESZ