Real-time diffusivity measurements in liquids at several temperatures with one sample
Identifieur interne : 016329 ( Main/Repository ); précédent : 016328; suivant : 016330Real-time diffusivity measurements in liquids at several temperatures with one sample
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Abstract
Based on the methodology of Codastefano, Di Russo, and Zanza [Rev. Sci. Instrum. 48, 1650 (1977)], we have developed a technique for the in situ measurement of diffusivities in liquids at several temperatures with one sample. In this approach, which circumvents solidification of the diffusion sample prior to concentration profiling, the evolution of the concentration distribution of a radiotracer is followed in real time using two pairs of radiation detectors. A detailed description of the experiment setup and its optimization by computer simulations is given. In experiments with 114mIn/In, apparent self-diffusivities were obtained between 300 °C and 900 °C with an uncertainty of ±5%. By utilizing the different self-absorption characteristics of the 24- and 190-keV photons of 114mIn, transport in the bulk of the sample and near the container wall was investigated independently. No difference was found.
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Michael Banish</name></author><author><name sortKey="Rosenberger, Franz" uniqKey="Rosenberger F">Franz Rosenberger</name></author></titleStmt><publicationStmt><idno type="inist">98-0183456</idno><date when="1998-02">1998-02</date><idno type="stanalyst">PASCAL 98-0183456 AIP</idno><idno type="RBID">Pascal:98-0183456</idno><idno type="wicri:Area/Main/Corpus">017567</idno><idno type="wicri:Area/Main/Repository">016329</idno></publicationStmt><seriesStmt><idno type="ISSN">1063-651X</idno><title level="j" type="abbreviated">Phys. rev., E Stat. phys. plasmas fluids relat. interdiscip. topics</title><title level="j" type="main">Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Experimental study</term><term>Gamma-ray applications</term><term>Indium</term><term>Liquid metals</term><term>Self-diffusion</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>6610C</term><term>0785</term><term>0705F</term><term>Etude expérimentale</term><term>Autodiffusion</term><term>Indium</term><term>Application rayonnement gamma</term><term>Métal liquide</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Based on the methodology of Codastefano, Di Russo, and Zanza [Rev. Sci. Instrum. 48, 1650 (1977)], we have developed a technique for the in situ measurement of diffusivities in liquids at several temperatures with one sample. In this approach, which circumvents solidification of the diffusion sample prior to concentration profiling, the evolution of the concentration distribution of a radiotracer is followed in real time using two pairs of radiation detectors. A detailed description of the experiment setup and its optimization by computer simulations is given. In experiments with <sup>114m</sup>In/In, apparent self-diffusivities were obtained between 300 °C and 900 °C with an uncertainty of ±5%. By utilizing the different self-absorption characteristics of the 24- and 190-keV photons of <sup>114m</sup>In, transport in the bulk of the sample and near the container wall was investigated independently. 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In experiments with <sup>114m</sup>In/In, apparent self-diffusivities were obtained between 300 °C and 900 °C with an uncertainty of ±5%. By utilizing the different self-absorption characteristics of the 24- and 190-keV photons of <sup>114m</sup>In, transport in the bulk of the sample and near the container wall was investigated independently. 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