Abstract
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.
Highlights
This study aims to further develop the 14C-PMMA porosity calculation method with a novel autoradiography technique, the Micro-pattern gas detector autoradiography (MPGDA)
MPGDA technique using 14C-PMMA method for porosity determination and pore structure characterization was investigated on a series of rock samples showing hydrothermal alteration
The porosities of the samples were measured by the 14C-PMMA method using two different autoradiographic techniques for 14C detection; storage phosphor autoradiography (SPA) and MPGDA
Summary
This study aims to further develop the 14C-PMMA porosity calculation method with a novel autoradiography technique, the Micro-pattern gas detector autoradiography (MPGDA). The image of the connected pore network can be produced by exposing the impregnated sample surface on a photographic film. This brief description corresponds to the 14C polymethylmethacrylate (14C-PMMA) autoradiography method[2,3,4] and will be used for porosity analysis in this work. Four kinds of technologies have been developed: (1) storage phosphor autoradiography (SPA) using phosphor imaging plates (IP) composed of alkali halide material (e.g. BaFBr:Eu2+)[14,15,16], (2) gaseous detector allowing to count electronic charge induced by radiation-gas interaction (ionization)[17,18,19,20,21], (3) semi-conductor sensor able to convert radiation or optical signal into electric signal such as CCD (Charged Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor)[22,23,24,25], and (4) scintillation based detec-
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
