The variability of single grain quartz luminescence properties investigated using EMCCD imaging
Optically stimulated luminescence (OSL) signals from individual quartz grains are frequently used for equivalent dose and age determination in luminescence dating. Typically, signals from individual grains are stimulated with a focussed solid-state laser and detected via a photomultiplier tube. In c...
| Main Authors: | , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
Elsevier
2022
|
| _version_ | 1797106592716423168 |
|---|---|
| author | Durcan, J Duller, G |
| author_facet | Durcan, J Duller, G |
| author_sort | Durcan, J |
| collection | OXFORD |
| description | Optically stimulated luminescence (OSL) signals from individual quartz grains are frequently used for equivalent dose and age determination in luminescence dating. Typically, signals from individual grains are stimulated with a focussed solid-state laser and detected via a photomultiplier tube. In contrast to the light-emitting diodes (LEDs) usually used when stimulating multiple-grain aliquots, the laser has a much higher stimulation power density. An absolute value for the effective stimulation power cannot easily be quantified, and the power delivered to each grain cannot be considered consistent throughout a measurement sequence. Both intra- and inter-sample variability in single grain luminescence signals parameters such as dose response form, decay rate, and sensitivity have long been recognised, however there remains uncertainty over how much of this variability is intrinsic to quartz grains or whether some should be attributed to variation in the effective stimulation power associated with the laser system. To better characterise intrinsic variability of single quartz OSL signals, an electron multiplier charge coupled device (EMCCD) attachment for the Risø reader was used for detecting and imaging luminescence signals. Whilst the EMCCD system currently offers a lower detection sensitivity when compared to the laser system, the ability to use LEDs for stimulation of the OSL signal circumvents the power variability associated with the laser system and allows an investigation of intrinsic variability to be made. In this paper, signal intensity and the composition of components in single grain luminescence signals are considered, and curve deconvolution is undertaken to calculate photo ionisation cross-sections for single grain quartz signals. For the samples considered, intra-sample variability in these characteristics is observed in single grain quartz luminescence signals imaged using an EMCCD. |
| first_indexed | 2024-03-07T07:04:41Z |
| format | Journal article |
| id | oxford-uuid:5e7282a9-cf21-4635-a68b-10d41273e659 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:04:41Z |
| publishDate | 2022 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:5e7282a9-cf21-4635-a68b-10d41273e6592022-04-25T14:48:38ZThe variability of single grain quartz luminescence properties investigated using EMCCD imagingJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5e7282a9-cf21-4635-a68b-10d41273e659EnglishSymplectic ElementsElsevier2022Durcan, JDuller, GOptically stimulated luminescence (OSL) signals from individual quartz grains are frequently used for equivalent dose and age determination in luminescence dating. Typically, signals from individual grains are stimulated with a focussed solid-state laser and detected via a photomultiplier tube. In contrast to the light-emitting diodes (LEDs) usually used when stimulating multiple-grain aliquots, the laser has a much higher stimulation power density. An absolute value for the effective stimulation power cannot easily be quantified, and the power delivered to each grain cannot be considered consistent throughout a measurement sequence. Both intra- and inter-sample variability in single grain luminescence signals parameters such as dose response form, decay rate, and sensitivity have long been recognised, however there remains uncertainty over how much of this variability is intrinsic to quartz grains or whether some should be attributed to variation in the effective stimulation power associated with the laser system. To better characterise intrinsic variability of single quartz OSL signals, an electron multiplier charge coupled device (EMCCD) attachment for the Risø reader was used for detecting and imaging luminescence signals. Whilst the EMCCD system currently offers a lower detection sensitivity when compared to the laser system, the ability to use LEDs for stimulation of the OSL signal circumvents the power variability associated with the laser system and allows an investigation of intrinsic variability to be made. In this paper, signal intensity and the composition of components in single grain luminescence signals are considered, and curve deconvolution is undertaken to calculate photo ionisation cross-sections for single grain quartz signals. For the samples considered, intra-sample variability in these characteristics is observed in single grain quartz luminescence signals imaged using an EMCCD. |
| spellingShingle | Durcan, J Duller, G The variability of single grain quartz luminescence properties investigated using EMCCD imaging |
| title | The variability of single grain quartz luminescence properties investigated using EMCCD imaging |
| title_full | The variability of single grain quartz luminescence properties investigated using EMCCD imaging |
| title_fullStr | The variability of single grain quartz luminescence properties investigated using EMCCD imaging |
| title_full_unstemmed | The variability of single grain quartz luminescence properties investigated using EMCCD imaging |
| title_short | The variability of single grain quartz luminescence properties investigated using EMCCD imaging |
| title_sort | variability of single grain quartz luminescence properties investigated using emccd imaging |
| work_keys_str_mv | AT durcanj thevariabilityofsinglegrainquartzluminescencepropertiesinvestigatedusingemccdimaging AT dullerg thevariabilityofsinglegrainquartzluminescencepropertiesinvestigatedusingemccdimaging AT durcanj variabilityofsinglegrainquartzluminescencepropertiesinvestigatedusingemccdimaging AT dullerg variabilityofsinglegrainquartzluminescencepropertiesinvestigatedusingemccdimaging |