Isothermal thermoluminescence signals from quartz

S. Huot, J. P. Buylaert, A. S. Murray

Research output: Contribution to journalArticlepeer-review

Abstract

Dating sediment older than ∼ 150 ka still remains difficult because of a lack of suitable chronological tools. Here we report on studies to determine whether measurements of quartz thermoluminescence made at constant temperature (isothermal luminescence) can be used to extend the dose limit in sediment dating. The origins and dosimetric characteristics of the quartz isothermal signal at 310 {ring operator} C are investigated. It is shown that, in general, application of a single aliquot regenerative (SAR) dose protocol with this signal overestimates the expected equivalent doses in sedimentary samples, from a variety of environments and locations. This anomaly originates from a change of luminescence sensitivity, during or after the initial thermal measurement. A single aliquot regenerated and added dose (SARA) protocol suggested as the only approach known to compensate for this initial change of sensitivity was unsuccessful.

Original languageEnglish (US)
Pages (from-to)796-802
Number of pages7
JournalRadiation Measurements
Volume41
Issue number7-8
DOIs
StatePublished - Aug 1 2006
Externally publishedYes

ASJC Scopus subject areas

  • Radiation
  • Instrumentation

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