Publication IC2MP
Utilisation du l’Autoradiographie électronique pour la cartographie quantitative de la porosité des roches par méthode 14C-PMMA
This study aims to further develop the 14C-PMMA porosity calculation method with a novel autoradiography technique, the Micro-pattern gas detector autoradiography (MPGDA). In this study, the MPGDA is compared with phosphor screen autoradiography (SPA). A set of rock samples from Martinique Island exhibiting a large range of connected porosities was used to validate the MPGDA method. Calculated porosities were found to be in agreement with ones from the SPA and the triple-weight method (TW). The filmless nature of MPGDA as well as straightforward determination of C-14 radioactivity from the source rock makes the porosity calculation less uncertain. The real-time visualization of radioactivity from C-14 beta emissions by MPGDA is a noticeable improvement in comparison to SPA.
Références
Delayre, C., Sammaljärvi, J., Billon, S. et al. Comparison of phosphor screen autoradiography and micro-pattern gas detector based autoradiography for the porosity of altered rocks. Sci Rep 10, 9455 (2020). https://doi.org/10.1038/s41598-020-65791-7