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Article: Calculation of the momentum distributions of positron annihilation radiation in Ge

TitleCalculation of the momentum distributions of positron annihilation radiation in Ge
Authors
Issue Date1997
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcm
Citation
Journal Of Physics Condensed Matter, 1997, v. 9 n. 38, p. 8147-8154 How to Cite?
AbstractOne- and two-dimensional momentum distributions of positron annihilation radiation in Ge are calculated using the independent-particle model (IPM), the local density approximation (LDA) and the generalized gradient approximation (GGA). It is found that these three approximations are all capable of reproducing the main structures of the momentum distributions observed in the one- and two-dimensional angular correlation of positron annihilation radiation measurements. The positron annihilation rate is, however, found to be overestimated in the LDA in the low-momentum regime. While the GGA alone gives the correct total annihilation rate, it is found that the GGA is essentially just scaled with the LDA, and introduces no new momentum dependence to eliminate the overestimation of the LDA in the low-momentum regime.
Persistent Identifierhttp://hdl.handle.net/10722/80472
ISSN
2015 Impact Factor: 2.209
2015 SCImago Journal Rankings: 0.812
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLiMing, Wen_HK
dc.contributor.authorPanda, BKen_HK
dc.contributor.authorFung, Sen_HK
dc.contributor.authorBeling, CDen_HK
dc.date.accessioned2010-09-06T08:06:50Z-
dc.date.available2010-09-06T08:06:50Z-
dc.date.issued1997en_HK
dc.identifier.citationJournal Of Physics Condensed Matter, 1997, v. 9 n. 38, p. 8147-8154en_HK
dc.identifier.issn0953-8984en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80472-
dc.description.abstractOne- and two-dimensional momentum distributions of positron annihilation radiation in Ge are calculated using the independent-particle model (IPM), the local density approximation (LDA) and the generalized gradient approximation (GGA). It is found that these three approximations are all capable of reproducing the main structures of the momentum distributions observed in the one- and two-dimensional angular correlation of positron annihilation radiation measurements. The positron annihilation rate is, however, found to be overestimated in the LDA in the low-momentum regime. While the GGA alone gives the correct total annihilation rate, it is found that the GGA is essentially just scaled with the LDA, and introduces no new momentum dependence to eliminate the overestimation of the LDA in the low-momentum regime.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcmen_HK
dc.relation.ispartofJournal of Physics Condensed Matteren_HK
dc.titleCalculation of the momentum distributions of positron annihilation radiation in Geen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0953-8984&volume=9&spage=8147&epage=8154&date=1997&atitle=Calculation+of+the+Momentum+Distributions+of+Positron+Annihilation+Radiation+in+Geen_HK
dc.identifier.emailFung, S: sfung@hku.hken_HK
dc.identifier.emailBeling, CD: cdbeling@hkucc.hku.hken_HK
dc.identifier.authorityFung, S=rp00695en_HK
dc.identifier.authorityBeling, CD=rp00660en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0953-8984/9/38/018en_HK
dc.identifier.scopuseid_2-s2.0-6144220050en_HK
dc.identifier.hkuros28825en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-6144220050&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume9en_HK
dc.identifier.issue38en_HK
dc.identifier.spage8147en_HK
dc.identifier.epage8154en_HK
dc.identifier.isiWOS:A1997XY64300018-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLiMing, W=24401511900en_HK
dc.identifier.scopusauthoridPanda, BK=22963418500en_HK
dc.identifier.scopusauthoridFung, S=7201970040en_HK
dc.identifier.scopusauthoridBeling, CD=7005864180en_HK

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