Thermoluminescence (TL) -Glowcurves from Some Feldspars and Stability of Far-red TL from Albite

• HASHIMOTO Tetsuo

  Department of Chemistry, Faculty of Science, Niigata University Graduated School of Science and Technology, Niigata University

• SAKAUE Hisanobu

  Graduated School of Science and Technology, Niigata University

• TAKEUCHI Tomoyuki

  Graduated School of Science and Technology, Niigata University

• MITAMURA Naoki

  Graduated School of Science and Technology, Niigata University

Bibliographic Information

Other Title

• 幾つかの長石からの熱ルミネセンス (TL) 発光曲線と曹長石からの遠赤色TLの安定性

Abstract

An on-line spectrometry of several museum feldspar specimens showed two broad TL-emissions around 150-200°C, separable into a blue thermoluminescence (BTL, having a peak at 450 nm) covering 350-550 nm and a far-red TL (far-RTL, giving a peak at 710 nm) ranging 650-760 nm in wavelengths. TL-glowcurve shapes and the dose-response of TL sensitivity showed a certain dependency not only on the far-RTL or BTL-detection, but also on kinds of feldspar samples. Particularly, alkaline feldspars gave higher sensitivity in comparison with plagioclase with Ca-rich feldspar.<BR>Concerning the albite as one kind of feldspar, the far-RTL showed negligibly small fading rate within a few percentages, whereas the BTL gave up to 18% reduction after the storage for 7 months at room temperature. The results revealed that the far-RTL source would be stable and preferable for the TL dating in spite of intrinsically weak intensity, estimated in the detective limitation in a few Gy, equivalent to archaeological burnt feldspar constituents approximately 1 000 years ago. Finally, a far-RTL emission mechanism was assigned to the participation of electric charge transfer on Fe²⁺ from Fe³⁺-impurity rather than the mechanism of energy transfer into Fe³⁺.

Journal

• RADIOISOTOPES

  RADIOISOTOPES 56 (1), 7-16, 2007

  Japan Radioisotope Association

Keywords

• thermoluminescence
• feldspar
• far-red thermoluminescence
• blue thermoluminescence
• albite
• fading effect
• spectrometry
• anomalous fading
• emission mechanism

Details

• CRID: 1390282679132978304
• NII Article ID: 130004127649
• NII Article ID: 10018719670
• NII Book ID: AN00351589
• DOI: 10.3769/radioisotopes.56.7
• ISSN: 18844111
• ISSN: 00338303
• NDL BIB ID: 8651968
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8651968
• Web Site: http://www.jstage.jst.go.jp/article/radioisotopes1952/56/1/56_1_7/_pdf
• Data Source:
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  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed