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An objective methodology for dose distribution analysis.

K Lepper1, S W S McKeever

  • 1Earth and Environmental Sciences Division, Los Alamos National Laboratory, NM 87545, USA. lepper@lanl.gov

Radiation Protection Dosimetry
|October 18, 2002
PubMed
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New methods allow objective analysis of luminescence dating data. This helps determine representative equivalent dose (De) for accurate sample age determination.

Area of Science:

  • Geochronology
  • Luminescence Dating
  • Quaternary Science

Background:

  • Single aliquot optically stimulated luminescence (OSL) techniques now yield large datasets of equivalent dose (De).
  • Comparing these extensive De distributions and identifying a representative dose for geological dating presents analytical challenges.

Purpose of the Study:

  • To present an objective analytical method for treating dose distributions from luminescence dating.
  • To provide a statistically rigorous approach for determining a representative equivalent dose (De) and its uncertainty.

Main Methods:

  • Development of a novel analytical method for processing equivalent dose (De) distributions.
  • Application of the method to Holocene aeolian and fluvial quartz sands from Central Oklahoma.
  • Comparison of results with existing analytical procedures for equivalent dose determination.

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Main Results:

  • The proposed analytical method provides a mathematically rigorous way to identify a representative equivalent dose (De).
  • The method defines a statistical measure for the uncertainty associated with the representative De.
  • Results obtained from Oklahoma quartz sands demonstrate the utility of the new analytical approach.

Conclusions:

  • The presented objective analytical method offers a robust framework for analyzing luminescence dating data.
  • This approach facilitates unbiased comparisons of equivalent dose (De) distributions.
  • The method enhances the accuracy and objectivity of determining sample ages in Quaternary research.