Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8168478 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2016 | 8 Pages |
Abstract
This paper formulates a quantitative answer to the following question: at hand specimen scale, how can alpha emitters in geo-materials be mapped quantitatively? In this study, we tested a new digital autoradiographic method (called the Beaverâ¢) based on a Micro Patterned Gaseous Detector (MPGD) in order to quantitatively map alpha emission at the centimeter scale rock section. Firstly, for two thin sections containing U-bearing minerals at secular equilibrium, we compared the experimental and theoretical alpha count rates, measured by the Beaver⢠and calculated from the uranium content, respectively. We found that they are very similar. Secondly, for a set of eight homemade standards made up of a mixture of inactive sand and low-radioactivity mud, we compared the count rates obtained by the Beaver⢠and by an alpha spectrometer. The results indicate (i) a linearity between both count rates, and (ii) that the count obtained by the Beaver⢠can be estimated from the count obtained by the alpha spectrometry using a factor of 0.82.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Paul Sardini, Axel Angileri, Michael Descostes, Samuel Duval, Tugdual Oger, Patricia Patrier, Nicolas Rividi, Marja Siitari-Kauppi, Hervé Toubon, Jérôme Donnard,