Storage ring study of the dissociative recombination of He2
Identifieur interne : 000292 ( Main/Exploration ); précédent : 000291; suivant : 000293Storage ring study of the dissociative recombination of He2
Auteurs : X. Urbain [Belgique] ; N. Djuri [États-Unis] ; C P Safvan [Danemark, Inde] ; M J Jensen [Danemark, États-Unis] ; H B Pedersen [Danemark, Allemagne] ; L Vejby Sgaard [Danemark] ; L H Andersen [Danemark]Source :
- Journal of Physics B: Atomic, Molecular and Optical Physics [ 0953-4075 ] ; 2005.
Abstract
Absolute cross sections for dissociative recombination have been measured for the 4He2 and 3He4He isotopomers as a function of storage time at the ASTRID storage ring. The recombination rate of 3He4He with low-energy electrons is found to dramatically decrease with time, giving an upper limit for the thermal rate coefficient for cold ions of the order of 6 1010 cm3 s1, in agreement with flowing afterglow measurements. Two-dimensional imaging of the atomic fragments points to He(1s21S) He(1s3s 3S) as the lowest dissociation channel to be accessed in the dissociative recombination of rovibrationally hot ions.
Url:
DOI: 10.1088/0953-4075/38/1/004
Affiliations:
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Djuri</name></author><author><name sortKey="Safvan, C P" sort="Safvan, C P" uniqKey="Safvan C" first="C P" last="Safvan">C P Safvan</name></author><author><name sortKey="Jensen, M J" sort="Jensen, M J" uniqKey="Jensen M" first="M J" last="Jensen">M J Jensen</name></author><author><name sortKey="Pedersen, H B" sort="Pedersen, H B" uniqKey="Pedersen H" first="H B" last="Pedersen">H B Pedersen</name></author><author><name sortKey="Sgaard, L Vejby" sort="Sgaard, L Vejby" uniqKey="Sgaard L" first="L Vejby" last="Sgaard">L Vejby Sgaard</name></author><author><name sortKey="Andersen, L H" sort="Andersen, L H" uniqKey="Andersen L" first="L H" last="Andersen">L H Andersen</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:D9E43D6BA7420D7BACD4F744BE3A261478682817</idno><date when="2005" year="2005">2005</date><idno type="doi">10.1088/0953-4075/38/1/004</idno><idno type="url">https://api.istex.fr/document/D9E43D6BA7420D7BACD4F744BE3A261478682817/fulltext/pdf</idno><idno type="wicri:Area/Main/Corpus">000948</idno><idno type="wicri:Area/Main/Curation">000948</idno><idno type="wicri:Area/Main/Exploration">000292</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Exploration">000292</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Storage ring study of the dissociative recombination of He2</title><author><name sortKey="Urbain, X" sort="Urbain, X" uniqKey="Urbain X" first="X" last="Urbain">X. Urbain</name><affiliation wicri:level="1"><country xml:lang="fr">Belgique</country><wicri:regionArea>Dpartement de Physique, Universit catholique de Louvain, Chemin du cyclotron 2, B-1348 Louvain-la-neuve</wicri:regionArea><wicri:noRegion>B-1348 Louvain-la-neuve</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Belgique</country></affiliation></author><author><name sortKey="Djuri, N" sort="Djuri, N" uniqKey="Djuri N" first="N" last="Djuri">N. Djuri</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Jet Propulsion Laboratory, CalTech, 4800 Oak Grove Dr, Pasadena, CA 91109</wicri:regionArea><wicri:noRegion>CA 91109</wicri:noRegion></affiliation></author><author><name sortKey="Safvan, C P" sort="Safvan, C P" uniqKey="Safvan C" first="C P" last="Safvan">C P Safvan</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Bld. 520, DK-8000 Aarhus C</wicri:regionArea><wicri:noRegion>DK-8000 Aarhus C</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Inde</country><wicri:regionArea>Present address: Nuclear Science Centre, Aruna Asaf Ali Marg, PO Box 10502, New Dehli 110 067</wicri:regionArea><wicri:noRegion>New Dehli 110 067</wicri:noRegion></affiliation></author><author><name sortKey="Jensen, M J" sort="Jensen, M J" uniqKey="Jensen M" first="M J" last="Jensen">M J Jensen</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Bld. 520, DK-8000 Aarhus C</wicri:regionArea><wicri:noRegion>DK-8000 Aarhus C</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Present address: Center for Integrated Plasma Studies, University of Colorado, UCB 390, Boulder, CO 80309-0390</wicri:regionArea><wicri:noRegion>CO 80309-0390</wicri:noRegion></affiliation></author><author><name sortKey="Pedersen, H B" sort="Pedersen, H B" uniqKey="Pedersen H" first="H B" last="Pedersen">H B Pedersen</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Bld. 520, DK-8000 Aarhus C</wicri:regionArea><wicri:noRegion>DK-8000 Aarhus C</wicri:noRegion></affiliation><affiliation wicri:level="3"><country xml:lang="fr">Allemagne</country><wicri:regionArea>Present address: Max-Planck Institut fr Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg</wicri:regionArea><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author><author><name sortKey="Sgaard, L Vejby" sort="Sgaard, L Vejby" uniqKey="Sgaard L" first="L Vejby" last="Sgaard">L Vejby Sgaard</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Bld. 520, DK-8000 Aarhus C</wicri:regionArea><wicri:noRegion>DK-8000 Aarhus C</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Present address: Danish Research Centre for Magnetic Resonance, Hvidovre Hospital, Kettegaard All 30, DK-2650 Hvidovre</wicri:regionArea><wicri:noRegion>DK-2650 Hvidovre</wicri:noRegion></affiliation></author><author><name sortKey="Andersen, L H" sort="Andersen, L H" uniqKey="Andersen L" first="L H" last="Andersen">L H Andersen</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Department of Physics and Astronomy, University of Aarhus, Ny Munkegade, Bld. 520, DK-8000 Aarhus C</wicri:regionArea><wicri:noRegion>DK-8000 Aarhus C</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Physics B: Atomic, Molecular and Optical Physics</title><title level="j" type="abbrev">J. Phys. B: At. Mol. Opt. Phys.</title><idno type="ISSN">0953-4075</idno><idno type="eISSN">1361-6455</idno><imprint><publisher>Institute of Physics Publishing</publisher><date type="published" when="2005">2005</date><biblScope unit="volume">38</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="43">43</biblScope><biblScope unit="page" to="50">50</biblScope><biblScope unit="production">Printed in the UK</biblScope></imprint><idno type="ISSN">0953-4075</idno></series><idno type="istex">D9E43D6BA7420D7BACD4F744BE3A261478682817</idno><idno type="DOI">10.1088/0953-4075/38/1/004</idno><idno type="PII">S0953-4075(05)85210-1</idno><idno type="articleID">185210</idno><idno type="articleNumber">004</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0953-4075</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Absolute cross sections for dissociative recombination have been measured for the 4He2 and 3He4He isotopomers as a function of storage time at the ASTRID storage ring. The recombination rate of 3He4He with low-energy electrons is found to dramatically decrease with time, giving an upper limit for the thermal rate coefficient for cold ions of the order of 6 1010 cm3 s1, in agreement with flowing afterglow measurements. Two-dimensional imaging of the atomic fragments points to He(1s21S) He(1s3s 3S) as the lowest dissociation channel to be accessed in the dissociative recombination of rovibrationally hot ions.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Belgique</li><li>Danemark</li><li>Inde</li><li>États-Unis</li></country><region><li>Bade-Wurtemberg</li><li>District de Karlsruhe</li></region><settlement><li>Heidelberg</li></settlement></list><tree><country name="Belgique"><noRegion><name sortKey="Urbain, X" sort="Urbain, X" uniqKey="Urbain X" first="X" last="Urbain">X. Urbain</name></noRegion><name sortKey="Urbain, X" sort="Urbain, X" uniqKey="Urbain X" first="X" last="Urbain">X. Urbain</name></country><country name="États-Unis"><noRegion><name sortKey="Djuri, N" sort="Djuri, N" uniqKey="Djuri N" first="N" last="Djuri">N. 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