کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10731187 1043117 2005 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of single-grain and small-aliquot OSL dose estimates in <3000 years old river sediments from South India
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم تشعشع
پیش نمایش صفحه اول مقاله
Comparison of single-grain and small-aliquot OSL dose estimates in <3000 years old river sediments from South India
چکیده انگلیسی
We report on OSL dose distributions derived from small-aliquot and single grains of quartz in young fluvial sediments sampled from the Penner River basin, South India. The single-grain dose distributions suggest that 13 out of 19 samples were well bleached. In many well-bleached samples, there was an underestimation in the single-aliquot dose estimates as compared to those from the single grain-the difference between average dose estimates determined by the two methods ranged from ∼1% to 31%. Such a dose underestimation was not detectable in poorly bleached samples. Various possible reasons for the discrepancy between single-grain and small-aliquot dose estimates are discussed. Although there is no satisfactory explanation for this discrepancy, we speculate that the difference in the stimulation wavelengths, 470±30nm in the case of single-aliquot and 532 nm in the case of single grains, could perhaps be one of the reasons; this may occur because the stimulation wavelength affects the proportion of the medium and slow components in the initial signal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Measurements - Volume 39, Issue 5, October 2005, Pages 457-469
نویسندگان
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