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hal.structure.identifierDepartment of Geography Giessen
dc.contributor.authorSONTAG-GONZÁLEZ, Mariana
dc.contributor.authorMITTELSTRASS, Dirk
hal.structure.identifierInstitute of Geography Heidelberg
hal.structure.identifierArchéosciences Bordeaux
dc.contributor.authorKREUTZER, Sebastian
hal.structure.identifierDepartment of Geography Giessen
dc.contributor.authorFUCHS, Markus
dc.date.issued2022-12
dc.identifier.issn1350-4487
dc.description.abstractEnSpectroscopic investigations provide important insights into the composition of luminescence emissions relevant to trapped-charge dating of sediments. Accurate wavelength calibration and a correction for the wavelength-dependent detection efficiency of the spectrometer system are crucial to ensure the correct spectrum interpretation and allow for its comparison with those obtained from other systems. However, to achieve an accurate detection efficiency correction, it is necessary to obtain the device-specific spectral response function (SRF). Here, we compare two SRF approximation methods by using either a calibration lamp of known irradiance or calculating the product of efficiency curves provided by the manufacturers of all known optical elements. We discuss the results using radiofluorescence (RF) measurements of two K-feldspar samples as an example. Feldspar infra-red (IR) RF spectra are known to be composed of several overlapping emissions, whose variation with sample mineralogy is still poorly understood and requires more extensive investigations. We find that both methods of sensitivity correction yield broadly similar results. However, the observed differences can alter a spectrum's interpretation. For example, we observe that after peak deconvolution the maximum signal wavelength of the IR-RF peak used for dating applications differs by ∼3–13 nm between the two methods, depending on sample and diffraction grating. We recommend using calibration lamps to determine a device's SRF but highlight the need to consider issues such as higher-order signals in the choice of filters to establish the SRF's reliable wavelength range. Additionally, we find that a simple and inexpensive fluorescent white light yields an acceptable wavelength calibration comparable to that obtained from a specialized light source.
dc.description.sponsorshipUsing the world in ancient societies : processes and forms of appropriation of space in Long Time - ANR-10-LABX-0052
dc.language.isoen
dc.publisherElsevier
dc.rights.urihttp://hal.archives-ouvertes.fr/licences/copyright/
dc.subject.enEmission spectroscopy
dc.subject.enEfficiency calibration
dc.subject.enRadiofluorescenc
dc.subject.enSpectrum deconvolution
dc.title.enWavelength calibration and spectral sensitivity correction of luminescence measurements for dosimetry applications: Method comparison tested on the IR-RF of K-feldspar
dc.typeArticle de revue
dc.identifier.doi10.1016/j.radmeas.2022.106876
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre
dc.subject.halPhysique [physics]
dc.identifier.arxiv2408.07991
dc.description.sponsorshipEuropeCREDit - Chronological REference Datasets and Sites (CREDit) towards improved accuracy and precision in luminescence-based chronologies
bordeaux.journalRadiation Measurements
bordeaux.page106876
bordeaux.volume159
bordeaux.peerReviewedoui
hal.identifierhal-03858752
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03858752v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Radiation%20Measurements&rft.date=2022-12&rft.volume=159&rft.spage=106876&rft.epage=106876&rft.eissn=1350-4487&rft.issn=1350-4487&rft.au=SONTAG-GONZ%C3%81LEZ,%20Mariana&MITTELSTRASS,%20Dirk&KREUTZER,%20Sebastian&FUCHS,%20Markus&rft.genre=article


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