کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1883251 1533409 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A luminescence dating intercomparison based on a Danish beach-ridge sand
ترجمه فارسی عنوان
لومینسانس دوستیابی مقاربت با استفاده از شن و ماسه ساحل-گودینگ دانمارکی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
چکیده انگلیسی


• First major OSL dating intercomparison.
• Homogeneous material: RSD dose <3%; dose rate <7%.
• Interlaboratory RSD 10–25% for most parameters.
• Much larger RSD for 232Th and saturated water content.
• RSD in ages ∼18%, significantly larger than the 5–10% expected.

There is a need for large scale intercomparisons to determine the degree of coherence of luminescence dating measurements made by different laboratories. Here we describe results from a laboratory intercomparison sample based on a quartz-rich aeolian and/or coastal marine sand ridge from the Skagen peninsula, northern Jutland (Denmark). About 200 kg of sand was sampled at night from a single beach ridge. The sand was homogenised using a cement mixer and packed in ∼700 moisture and light-tight bags for distribution. The quartz luminescence characteristics are satisfactory (e.g. fast-component dominated and good dose recovery) and our own equivalent dose determinations and measurements of radionuclide concentrations for twenty of these bags demonstrate the degree of homogenisation. One natural sample and one sample of pre-processed quartz was made available on request; analysis of all the responses gives a mean dose (pre-processed quartz) of 4.58 Gy, σ = 0.40 (n = 26), to be compared to the mean dose (self-extracted quartz) of 4.52 Gy, σ = 0.55 (n = 21). The mean age is 3.99 ± 0.14 ka, σ = 0.71 (n = 22), i.e. a relative standard deviation of 18%. We present an analysis of all the important quantitative and qualitative responses we received between 2007 and 2012 and discuss the implications for our dating community and for users of luminescence ages.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Measurements - Volume 81, October 2015, Pages 32–38
نویسندگان
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