Electronic autoradiography of Ba-133 particle emissions; diffusion profiles in granitic rocks

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http://hdl.handle.net/10138/304403

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Muuri , E , Sorokina , T , Donnard , J , Billon , S , Helariutta , K , Koskinen , L , Martin , A & Siitari-Kauppi , M 2019 , ' Electronic autoradiography of Ba-133 particle emissions; diffusion profiles in granitic rocks ' , Applied Radiation and Isotopes , vol. 149 , pp. 108-113 . https://doi.org/10.1016/j.apradiso.2019.04.026

Title: Electronic autoradiography of Ba-133 particle emissions; diffusion profiles in granitic rocks
Author: Muuri, Eveliina; Sorokina, Tatiana; Donnard, Jerome; Billon, Sophie; Helariutta, Kerttuli; Koskinen, Lasse; Martin, Andrew; Siitari-Kauppi, Marja
Contributor: University of Helsinki, Geological disposal of spent nuclear fuel
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
Date: 2019-07
Language: eng
Number of pages: 6
Belongs to series: Applied Radiation and Isotopes
ISSN: 0969-8043
URI: http://hdl.handle.net/10138/304403
Abstract: The spatial distribution of barium activity in granitic rocks was measured with two autoradiography techniques; digital autoradiography using phosphor imaging plate technique (Fuji 5100) and filmless electronic autoradiography (i.e. The BeaQuant (TM)), which is based on a gas detector incorporated in a micromesh Parallel Ionization Multiplier (PIM). Rock cubes taken from a diffusion experiment that were in contact with Ba-133 tracer were measured to determine diffusion profiles. In addition, the spatial distribution of Ba-133 in the samples was determined. Polymethyl methacrylate standards for Ba-133 were developed to determine the counting efficiency for electronic autoradiography. Good visual correlation between the two autoradiography methods were obtained in this study. The results of the experiments presented here can be utilized in future studies on the diffusion behavior of barium in granitic rocks.
Subject: FREE-RADICAL POLYMERIZATION
THERMAL INITIATOR
OLKILUOTO
TRANSPORT
POROSITY
CESIUM
114 Physical sciences
116 Chemical sciences
1171 Geosciences
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