ルミネッセンス年代測定における年間α線量の粒径依存性の検討と準微粒子法への適用

概要

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Fine (1 ? 8μm) or coarse (～100μm or >50μm) mineral has been used in luminescence datings. Minerals of semi-fine sizes (8 - 50μm), however, have not been used for luminescence dating samples because of the difficulty in assessing the effective α dose rate. In this article, we propose a simple formula which gives a correction factor for α dose rate in luminescence dating with semi-fine grains The formula is based on an effective range of α particles which is incident to spherical mineral grains, α dose-rate correction factors are calculated for quartz with a diameter of 0 - 50μm assuming the effective α-particle range of 7.5, 10, 15 and 20μm. The results were applied to IRSL datings of tephra and sediments from archaeological sites, and reasonably accurate ages were abtained.
奈良教育大学の論文
2004-10-29