Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

The a-value of polymineral fine grain samples measured with the post-IR IRSL protocol

Title data

Kreutzer, Sebastian ; Schmidt, Christoph ; de Witt, Regina ; Fuchs, Markus:
The a-value of polymineral fine grain samples measured with the post-IR IRSL protocol.
In: Radiation Measurements. Vol. 69 (October 2014) . - pp. 18-29.
ISSN 1350-4487
DOI: https://doi.org/10.1016/j.radmeas.2014.04.027

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
No informationFU417/7-2

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Recent post-IR IRSL (pIRIR) dating studies using polymineral fine grains assumed that the a-values obtained for the IRSL signal at 50 °C and the pIRIR signal at higher temperatures (e.g. 225 °C) are identical. However, the a-value of a sample depends on the stimulation method, and the assumption mentioned above remains to be tested. Using five polymineral fine grain samples, this study investigates whether a common a-value can be used for both the IR and the pIRIR signals. Applying the pIRIR protocol, the a-values were measured with three different methods of signal resetting (optical bleaching, end of SAR cycle, heating). In addition, uncorrected alpha- and beta-irradiation induced growth curves were determined for three samples and fitted with single saturating exponential functions. For the investigated samples we found significant mean differences, 0.023 ± 0.012 and higher, in the a-values determined for the IR50 and pIRIR225 signals. Synthetic a-values deduced from uncorrected multiple-aliquot dose response curves seem to confirm this observation. Although, in summary, our results indicate that the practice of using a common a-value should be carefully re-considered, the physical reasons remain to be determined.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: a-value; alpha-efficiency; post-IR IRSL; Polymineral; Fine grain; Loess; Luminescence dating
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Geomorphology - Univ.-Prof. Dr. Ludwig Zöller
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Profile Fields > Advanced Fields > Nonlinear Dynamics
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Geomorphology
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 550 Earth sciences, geology
Date Deposited: 11 Jan 2016 10:28
Last Modified: 08 Mar 2016 14:42
URI: https://eref.uni-bayreuth.de/id/eprint/29603