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Article: Role of scattering-factor anisotropy in electron, positron, and photon holography

TitleRole of scattering-factor anisotropy in electron, positron, and photon holography
Authors
KeywordsPhysics
Issue Date1998
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 1998, v. 58 n. 16, p. 10815-10822 How to Cite?
AbstractWe have studied the angular anisotropy in the scattering factor of electrons, positrons, and photons in solids. We show that as a function of angle, the maximum number of dips in the scattering factor's magnitude and jumps of near π in its phase are related to the angular momenta of the bound and resonance states of the potential. The effect of the scattering factor's anisotropy on low-energy electron and positron holographic wave-front reconstruction is discussed. Applying the variable-axis small-cone method, a good-quality reconstructed image is only possible within angular regions where the scattering factor is near isotropic. Thus the usable window for low-energy electron wave-front reconstruction is element dependent; the window size decreases as the atomic number increases. Positrons, on the other hand, are like photons and are not bound by the potential. For positrons or photons, there is no elemental dependence of the usable window and the entire backscattering regime is suitable for holographic reconstruction. We have established two rules that predict the maximum number of magnitude dips and phase jumps in the scattering factor for any element.
Persistent Identifierhttp://hdl.handle.net/10722/43261
ISSN
2001 Impact Factor: 3.07
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTong, SYen_HK
dc.contributor.authorMok, CWen_HK
dc.contributor.authorWu, Hen_HK
dc.contributor.authorXin, LZen_HK
dc.date.accessioned2007-03-23T04:42:23Z-
dc.date.available2007-03-23T04:42:23Z-
dc.date.issued1998en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 1998, v. 58 n. 16, p. 10815-10822en_HK
dc.identifier.issn0163-1829en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43261-
dc.description.abstractWe have studied the angular anisotropy in the scattering factor of electrons, positrons, and photons in solids. We show that as a function of angle, the maximum number of dips in the scattering factor's magnitude and jumps of near π in its phase are related to the angular momenta of the bound and resonance states of the potential. The effect of the scattering factor's anisotropy on low-energy electron and positron holographic wave-front reconstruction is discussed. Applying the variable-axis small-cone method, a good-quality reconstructed image is only possible within angular regions where the scattering factor is near isotropic. Thus the usable window for low-energy electron wave-front reconstruction is element dependent; the window size decreases as the atomic number increases. Positrons, on the other hand, are like photons and are not bound by the potential. For positrons or photons, there is no elemental dependence of the usable window and the entire backscattering regime is suitable for holographic reconstruction. We have established two rules that predict the maximum number of magnitude dips and phase jumps in the scattering factor for any element.en_HK
dc.format.extent184233 bytes-
dc.format.extent29184 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsPhysical Review B (Condensed Matter). Copyright © American Physical Society.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPhysicsen_HK
dc.titleRole of scattering-factor anisotropy in electron, positron, and photon holographyen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0163-1829&volume=58&issue=16&spage=10815&epage=10822&date=1998&atitle=Role+of+scattering-factor+anisotropy+in+electron,+positron,+and+photon+holographyen_HK
dc.identifier.emailWu, H: hswu@hkucc.hku.hken_HK
dc.identifier.authorityWu, H=rp00813en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.58.10815en_HK
dc.identifier.scopuseid_2-s2.0-0000753393en_HK
dc.identifier.hkuros39386-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0000753393&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume58en_HK
dc.identifier.issue16en_HK
dc.identifier.spage10815en_HK
dc.identifier.epage10822en_HK
dc.identifier.isiWOS:000076716500108-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridTong, SY=24512624800en_HK
dc.identifier.scopusauthoridMok, CW=7102344236en_HK
dc.identifier.scopusauthoridWu, H=7405584367en_HK
dc.identifier.scopusauthoridXin, LZ=7004893520en_HK

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