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Laser-induced alteration of Raman spectra for micron-sized solid particles

Böttger, Ute and Pavlov, S.G. and Deßmann, N. and Hanke, Franziska and Weber, I. and Fritz, J. and Hübers, Heinz-Wilhelm (2016) Laser-induced alteration of Raman spectra for micron-sized solid particles. Planetary and Space Science, 138, pp. 25-32. Elsevier. DOI: 10.1016/j.pss.2017.02.001 ISSN 0032-0633

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Official URL: http://www.sciencedirect.com/science/article/pii/S0032063316301027

Abstract

The Raman Laser Spectrometer (RLS) instrument on board of the future ESAs ExoMars mission will analyze micron-sized powder samples in a low pressure atmosphere. Such micron-sized polycrystalline solid particles might be heated by the laser during the Raman measurements. Here, we report on the temperature-induced alteration of Raman spectra from micron-sized polycrystalline solid particles by comparing Raman spectra on silicon and the rock forming minerals olivine and pyroxene taken at different laser intensities and different ambient temperatures. Our analyses indicate that laser-induced heating results in both broadening and shifting of characteristic Raman lines in the Stokes and anti-Stokes spectral regions. For elementary crystalline silicon a significant local temperature increase and relevant changes in Raman spectra have been observed in particles with median sizes below 250 μm. In comparison, significantly weaker laser-induced Raman spectral changes were observed in more complex rockforming silicate minerals; even for lower grain sizes. Laser power densities realized in the RLS ExoMars instrument should cause only low local heating effects and, thus, negligible frequency shifts of the major Raman lines in common silicate minerals such as olivine and pyroxene.

Item URL in elib:https://elib.dlr.de/107975/
Document Type:Article
Title:Laser-induced alteration of Raman spectra for micron-sized solid particles
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Böttger, Uteinstitut für optische sensorsysteme, dlr, berlinUNSPECIFIED
Pavlov, S.G.institut für optische sensorsysteme, dlr, berlinUNSPECIFIED
Deßmann, N.nils.dessmann (at) dlr.deUNSPECIFIED
Hanke, Franziskainstitut für optische sensorsysteme, dlr, berlinUNSPECIFIED
Weber, I.institut für planetologie, wwu münster, germanyUNSPECIFIED
Fritz, J.naturkundemuseum, berlinUNSPECIFIED
Hübers, Heinz-Wilhelmdlr, institut für optische sensorsystemeUNSPECIFIED
Date:2016
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:138
DOI :10.1016/j.pss.2017.02.001
Page Range:pp. 25-32
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:Raman spectroscopy; ExoMars mission; laser induced alteration; micron-sized solid particles
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Böttger, Dr.rer.nat. Ute
Deposited On:06 Feb 2017 10:24
Last Modified:31 Jul 2019 20:05

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