A note on nuclear excitation by positron annihilation with K-shell electrons
Identifieur interne : 000217 ( Main/Exploration ); précédent : 000216; suivant : 000218A note on nuclear excitation by positron annihilation with K-shell electrons
Auteurs : RBID : ISTEX:10751_1994_Article_BF02064529.pdfAbstract
Experimental data for the nuclear excitation of115In by positron annihilation with K-shell electrons have been examined, taking account of the effective thickness of an In target used, and then the cross sectionσres for resonance excitation to the 1078 keV energy level by positron annihilation has been reevaluated. The cross section for the process is induced by the measured effective cross sectionσeff of nuclear excitation of the isomeric level115mIn. In this work the effective thicknesses of the In target for positrons with kinetic energies 83.9 and 470 keV have been estimated. The effective thickness δr has been determined from a relation δr=δE/ ¦dE/dr¦, where δE is the positron energy width at 83.9 or 470 keV, δr is the mean distance traversed by them, and ¦dE/dr¦ the stopping power of indium for them. In the present case,δK, the atomic-level width of the K-level of indium, is used as δE. Neglecting a contribution from the 1464 keV level being much smaller than that from the 1078 keV level, a reevaluated value ofσres has been obtained as 1.7×10−25 cm2.
DOI: 10.1007/BF02064529
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<record><TEI><teiHeader><fileDesc><titleStmt><title>A note on nuclear excitation by positron annihilation with K-shell electrons</title><author><name>Toshifumi Saigusa</name><affiliation wicri:level="1"><mods:affiliation>Ryukoku University, 612, Kyoto, Japan</mods:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Ryukoku University, 612, Kyoto</wicri:regionArea><wicri:noRegion>Kyoto</wicri:noRegion></affiliation></author><author><name>Sakae Shimizu</name><affiliation wicri:level="1"><mods:affiliation>Institute for Chemical Research, Kyoto University, 606, Kyoto, Japan</mods:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Institute for Chemical Research, Kyoto University, 606, Kyoto</wicri:regionArea><wicri:noRegion>Kyoto</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="RBID">ISTEX:10751_1994_Article_BF02064529.pdf</idno><date when="1994">1994</date><idno type="doi">10.1007/BF02064529</idno><idno type="wicri:Area/Main/Corpus">000327</idno><idno type="wicri:Area/Main/Curation">000327</idno><idno type="wicri:Area/Main/Exploration">000217</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="eng">Experimental data for the nuclear excitation of115In by positron annihilation with K-shell electrons have been examined, taking account of the effective thickness of an In target used, and then the cross sectionσres for resonance excitation to the 1078 keV energy level by positron annihilation has been reevaluated. The cross section for the process is induced by the measured effective cross sectionσeff of nuclear excitation of the isomeric level115mIn. In this work the effective thicknesses of the In target for positrons with kinetic energies 83.9 and 470 keV have been estimated. The effective thickness δr has been determined from a relation δr=δE/ ¦dE/dr¦, where δE is the positron energy width at 83.9 or 470 keV, δr is the mean distance traversed by them, and ¦dE/dr¦ the stopping power of indium for them. In the present case,δK, the atomic-level width of the K-level of indium, is used as δE. Neglecting a contribution from the 1464 keV level being much smaller than that from the 1078 keV level, a reevaluated value ofσres has been obtained as 1.7×10−25 cm2.</div></front></TEI><mods xsi:schemaLocation="http://www.loc.gov/mods/v3 file:///applis/istex/home/loadistex/home/etc/xsd/mods.xsd" version="3.4" istexId="374381d9ba06b21572a857262da839c88c5f270f"><titleInfo lang="eng"><title>A note on nuclear excitation by positron annihilation with K-shell electrons</title></titleInfo><name type="personal"><namePart type="given">Toshifumi</namePart><namePart type="family">Saigusa</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Ryukoku University, 612, Kyoto, Japan</affiliation></name><name type="personal"><namePart type="given">Sakae</namePart><namePart type="family">Shimizu</namePart><role><roleTerm type="text">author</roleTerm></role><affiliation>Institute for Chemical Research, Kyoto University, 606, Kyoto, Japan</affiliation></name><typeOfResource>text</typeOfResource><genre>Contributed Papers</genre><genre>Original Paper</genre><originInfo><publisher>Baltzer Science Publishers, Baarn/Kluwer Academic Publishers, Dordrecht</publisher><dateValid encoding="w3cdtf">2005-07-25</dateValid><copyrightDate encoding="w3cdtf">1994</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="eng">Experimental data for the nuclear excitation of115In by positron annihilation with K-shell electrons have been examined, taking account of the effective thickness of an In target used, and then the cross sectionσres for resonance excitation to the 1078 keV energy level by positron annihilation has been reevaluated. The cross section for the process is induced by the measured effective cross sectionσeff of nuclear excitation of the isomeric level115mIn. In this work the effective thicknesses of the In target for positrons with kinetic energies 83.9 and 470 keV have been estimated. The effective thickness δr has been determined from a relation δr=δE/ ¦dE/dr¦, where δE is the positron energy width at 83.9 or 470 keV, δr is the mean distance traversed by them, and ¦dE/dr¦ the stopping power of indium for them. In the present case,δK, the atomic-level width of the K-level of indium, is used as δE. Neglecting a contribution from the 1464 keV level being much smaller than that from the 1078 keV level, a reevaluated value ofσres has been obtained as 1.7×10−25 cm2.</abstract><relatedItem type="series"><titleInfo type="abbreviated"><title>Hyperfine Interact</title></titleInfo><titleInfo><title>Hyperfine Interactions</title><partNumber>Year: 1994</partNumber><partNumber>Volume: 89</partNumber><partNumber>Number: 1</partNumber></titleInfo><genre>Archive Journal</genre><originInfo><dateIssued encoding="w3cdtf">1994-12-01</dateIssued><copyrightDate encoding="w3cdtf">1994</copyrightDate></originInfo><subject usage="primary"><topic>Physics</topic><topic>Nuclear Physics, Heavy Ions, Hadrons</topic><topic>Atoms, Molecules, Clusters and Plasmas</topic><topic>Condensed Matter</topic><topic>Surfaces and Interfaces, Thin Films</topic></subject><identifier type="issn">0304-3843</identifier><identifier type="issn">Electronic: 1572-9540</identifier><identifier type="matrixNumber">10751</identifier><identifier type="local">IssueArticleCount: 45</identifier><recordInfo><recordOrigin>J.C. Baltzer AG, Science Publishers, 1994</recordOrigin></recordInfo></relatedItem><identifier type="doi">10.1007/BF02064529</identifier><identifier type="matrixNumber">Art39</identifier><identifier type="local">BF02064529</identifier><accessCondition type="use and reproduction">MetadataGrant: OpenAccess</accessCondition><accessCondition type="use and reproduction">AbstractGrant: OpenAccess</accessCondition><accessCondition type="restriction on access">BodyPDFGrant: Restricted</accessCondition><accessCondition type="restriction on access">BodyHTMLGrant: Restricted</accessCondition><accessCondition type="restriction on access">BibliographyGrant: Restricted</accessCondition><accessCondition type="restriction on access">ESMGrant: Restricted</accessCondition><part><extent unit="pages"><start>445</start><end>451</end></extent></part><recordInfo><recordOrigin>J.C. 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