Calibration of digital autoradiograph technique for quantifying rock porosity using C-14-PMMA method

Paul Sardini (1) , Laurent Caner (1) , Pierre Mossler (1) , Arnaud Mazurier , Karl-Heinz Hellmuth , Robert C. Graham, , Ann M. Rossi, , Marja Siitari-Kauppi

1 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]

Digital autoradiography (DA) based on phosphor plate imaging was tested for porosity quantification using C-14-PMMA method, and was compared to the classical film autoradiography (FA) method. Validation was undertaken by characterizing porosity evolution of moraine deposits of Lamarck granodiorite (eastern Sierra Nevada, USA). The connected porosities obtained with FA and DA are comparable to density measurements. Using adapted exposure times, DA is more accurate than FA for analysing large variations of porosity within a given sample, and is faster than FA.

Mots clés: Porosity; Moraine; Phosphor plate imaging; C-14-PMMA method; Autoradiography; Granodiorite

Domaines: Sciences de la Terre

Paul Sardini, Laurent Caner, Pierre Mossler, Arnaud Mazurier, Karl-Heinz Hellmuth, et al.. Calibration of digital autoradiograph technique for quantifying rock porosity using C-14-PMMA method . Journal of Radioanalytical and Nuclear Chemistry, 2015, 303, pp.11-23 ⟨10.1007/s10967-014-3617-9⟩. ⟨hal-01361731⟩