Variations in Luminescence Sensitivity of Various Quartz Samples from Southwestern Nigeria
Year 2018,
Volume: 5 Issue: 2, 17 - 23, 02.03.2019
E. O. Oniya
Abstract
This research
was undertaken to investigate the sensitivity of Thermoluminescence (TL),
Optically Stimulated Luminescence (OSL) and Infra-Red Stimulation Luminescence
(IRSL) of twelve (12) quartz samples from different locations in the Southwestern
part of Nigeria. This was done with a motive to survey the provenance
suitability of each one of them for luminescence dating. All the luminescence
measurements on the 12 quartz sample were carried out using a RISØ TL/OSL read
(model TL/OSL-DA-15). Each of the samples displayed different range of luminescence
responses to the same test dose. The sensitivity of the TL and OSL did not
follow identical pattern for all the samples but that of LM-OSL and CW-OSL
demonstrated nearly identical pattern. Feldspar inclusion was identified to be
responsible for the deviation of the sensitivity of OSL from that of TL. Effect
of feldspar inclusion seemed passive in TL but highly active in OSL; most
especially fast component. The significant of feldspar inclusion in SAR
protocols was stressed. Further studies on the samples at varying test doses
may improve the understanding of the behavior of these samples.
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