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dc.contributor.authorAdhikari, S. K.
dc.contributor.authorBiswas, P. K.
dc.contributor.authorSultanov, R. A.
dc.date.accessioned2014-05-20T14:06:28Z
dc.date.available2014-05-20T14:06:28Z
dc.date.issued1999-06-01
dc.identifierhttp://dx.doi.org/10.1103/PhysRevA.59.4829
dc.identifier.citationPhysical Review A. College Pk: American Physical Soc, v. 59, n. 6, p. 4829-4832, 1999.
dc.identifier.issn1050-2947
dc.identifier.urihttp://hdl.handle.net/11449/23321
dc.description.abstractVery-low-energy scattering of orthopositronium by helium has been investigated for the simultaneous study of elastic cross section and pickoff quenching rate using a model exchange potential. The present calculational scheme, while it agrees with the measured cross section of Skalsey et nl., reproduces successfully the parameter (1)Z(eff), the effective number of electrons per atom in a singlet state relative to the positron. Together with the fact that this model potential also leads to an agreement with measured medium energy cross sections of this system, this study seems to resolve the long-standing discrepancy at low energies among different theoretical calculations and experimental measurements.en
dc.format.extent4829-4832
dc.language.isoeng
dc.publisherAmerican Physical Soc
dc.relation.ispartofPhysical Review A
dc.sourceWeb of Science
dc.titleLow-energy quenching of positronium by heliumen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmerican Physical Soc
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil
dc.identifier.doi10.1103/PhysRevA.59.4829
dc.identifier.wosWOS:000080777600095
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt
dc.identifier.fileWOS000080777600095.pdf
dc.identifier.lattes8031087349809439
unesp.author.lattes8031087349809439
dc.relation.ispartofsjr1,288
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