Study of the F′ Center in Several Alkali Halides

dc.contributor.author Lynch, David
dc.contributor.author Robinson, David
dc.contributor.author Lynch, David
dc.contributor.department Physics and Astronomy
dc.date 2018-02-15T18:02:45.000
dc.date.accessioned 2020-06-30T06:17:22Z
dc.date.available 2020-06-30T06:17:22Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 1968
dc.date.embargo 2015-01-15
dc.date.issued 1968-10-01
dc.description.abstract <p>The F′ band has been produced and measured in the following alkali halides: NaCl, KCl, KBr, KI, RbCl, RbI, CsBr, and CsI. Additively colored samples were optically bleached in the F band at an optimum temperature to produce a maximum F-to-F′ conversion. The observed spectra exhibited two distinctive features. In each salt the F′ band had a shoulder on the high-energy side of the principal peak, except in NaCl where the band was bell-shaped. CsBr and CsI exhibited a more complex structure. The shoulder in the potassium and rubidium salts is attributed to low-lying d-like states in their conduction-band structure. In all salts there was a small second absorption shoulder on the high-energy tail of the F′ band. This absorption is attributed to F′ absorption such that the remaining F center is left in an excited 2por 2s state. A semicontinuum-model variational calculation using a correlated Hylleraas wave function yields, for reasonable values of the parameters, F′ binding energies in fair agreement with the observed optical absorption edges. An absorption-cross-section calculation yields absorption curves in good agreement with experiment if one excludes the aforementioned structure.</p>
dc.description.comments <p>This article is from <em>Physica Review</em> 174 (1968): 1050, doi:<a href="http://dx.doi.org/10.1103/PhysRev.174.1050" target="_blank">10.1103/PhysRev.174.1050</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/physastro_pubs/16/
dc.identifier.articleid 1012
dc.identifier.contextkey 6530734
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath physastro_pubs/16
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/56902
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/physastro_pubs/16/1968_Lynch_StudyFCenter.pdf|||Fri Jan 14 20:50:45 UTC 2022
dc.source.uri 10.1103/PhysRev.174.1050
dc.subject.disciplines Atomic, Molecular and Optical Physics
dc.subject.disciplines Physics
dc.subject.keywords salts
dc.subject.keywords optical absorption
dc.subject.keywords wave functions
dc.title Study of the F′ Center in Several Alkali Halides
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication fa3aaf34-6c45-4f1c-9296-edcfc98e117b
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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