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Gated Raman spectroscopy; potential for fundamental and applied mineralogy

Michael Gaft and Lev Nagli
Gated Raman spectroscopy; potential for fundamental and applied mineralogy (in Sixth European conference on Mineralogy and spectroscopy, Eugen Libowitzky (editor) and Manfred Wildner (editor))
European Journal of Mineralogy (January 2009) 21 (1): 33-42

Abstract

Using calcite as example, we demonstrate how a pulsed UV laser and time-resolved detection methods allow discrimination of Raman signals from strong luminescence background light. It is done in time domain and spectral domain. In time domain experiments, we use the fact that Raman scattering is produced almost instantaneously, whereas for emissions associated with luminescence, a minimum of hundreds of picoseconds elapse between electronic excitation and radiative decay. In the spectral domain, Raman peaks are very close to the UV excitation frequency whereas the luminescence is spectrally separated because of its larger Stokes shift compared to Raman. The UV gated Raman technique is a potential tool for remote sensing and online sorting of minerals.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 21
Serial Issue: 1
Title: Gated Raman spectroscopy; potential for fundamental and applied mineralogy
Title: Sixth European conference on Mineralogy and spectroscopy
Author(s): Gaft, MichaelNagli, Lev
Author(s): Libowitzky, Eugeneditor
Author(s): Wildner, Manfrededitor
Affiliation: Laser Detect Systems, Petah Tikva, Israel
Pages: 33-42
Published: 200901
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
Meeting name: Sixth European conference on Mineralogy and spectroscopy
Meeting location: Stockholm, SWE, Sweden
Meeting date: 20070908Sept. 8-11, 2007
References: 24
Accession Number: 2009-032663
Categories: General geochemistryGeneral mineralogy
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
Secondary Affiliation: Tel-Aviv University, ISR, Israel
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200918
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