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TL, EPR and optical absorption studies on natural alexandrite compared to natural chrysoberyl

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dc.contributor.authorFerraz, G. M.
dc.contributor.authorWatanabe, S.
dc.contributor.authorSouza, S. O.
dc.contributor.authorScalvi, Rosa Maria Fernandes [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:20:31Z
dc.date.available2014-05-27T11:20:31Z
dc.date.issued2002-10-19
dc.description.abstractThe TL, optical absorption (OA) and EPR properties of natural Brazilian alexandrite and chrysoberyl have been investigated. The TL measurements for natural alexandrite show five peaks between 100 and 450°C, with their emission spectrum having 370 and/or 570 nm components. The intensity of the 320°C TL peak was found to be enhanced with pre-annealing treatment, more prominently above 600°C. The OA and EPR measurements showed that this kind of heat treatment induces the Fe2→ Fe3+ conversion in the natural sample. Chrysoberyl samples exhibited the TL peaks at the same temperatures as alexandrite samples, but the glow curves were more than 200 times less intense than alexandrite ones.en
dc.description.affiliationDepartamento de Física Nuclear Instituto de Física Universidade de Sâo Paulo, C. P., 66318, CEP: 05315-970, São Paulo
dc.description.affiliationDepartamento de Física Faculdade de Ciências UNESP-Bauru, São Paulo
dc.description.affiliationUnespDepartamento de Física Faculdade de Ciências UNESP-Bauru, São Paulo
dc.format.extent471-474
dc.identifierhttp://rpd.oxfordjournals.org/content/100/1-4/471.abstract
dc.identifier.citationRadiation Protection Dosimetry, v. 100, n. 1-4, p. 471-474, 2002.
dc.identifier.issn0144-8420
dc.identifier.lattes0492600439402115
dc.identifier.scopus2-s2.0-0036392666
dc.identifier.urihttp://hdl.handle.net/11449/67001
dc.identifier.wosWOS:000178899600105
dc.language.isoeng
dc.relation.ispartofRadiation Protection Dosimetry
dc.relation.ispartofjcr0.822
dc.relation.ispartofsjr0,487
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectalexandrite
dc.subjectchrysoberyl
dc.subjectferric ion
dc.subjectferrous ion
dc.subjectmineral
dc.subjectunclassified drug
dc.subjectcontrolled study
dc.subjectelectron spin resonance
dc.subjectheat treatment
dc.subjectoptics
dc.subjectradiation absorption
dc.subjectsample
dc.subjectspectrum
dc.subjecttemperature
dc.subjectthermoluminescence
dc.subjectBeryllium
dc.subjectCrystallization
dc.subjectElectron Spin Resonance Spectroscopy
dc.subjectHeat
dc.subjectLuminescent Measurements
dc.subjectOptics
dc.subjectThermoluminescent Dosimetry
dc.subjectX-Rays
dc.titleTL, EPR and optical absorption studies on natural alexandrite compared to natural chrysoberylen
dc.typeArtigo
dcterms.licensehttp://www.oxfordjournals.org/access_purchase/self-archiving_policyb.html
dspace.entity.typePublication
unesp.author.lattes0492600439402115
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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