Assessing the impact of IR stimulation at increasing temperatures to the OSL signal of contaminated quartz

ŞAHİNER E., Meric N., Polymeris G. S.

RADIATION MEASUREMENTS, cilt.68, ss.14-22, 2014 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 68
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.radmeas.2014.06.006
  • Dergi Adı: RADIATION MEASUREMENTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.14-22
  • Anahtar Kelimeler: Post IR OSL, De-convolution, Component resolved analysis, Tunnelling, Fast OSL component, COMPUTERIZED CURVE DECONVOLUTION, LIGHT-EMITTING DIODES, LUMINESCENCE COMPONENTS, K-FELDSPARS, THERMOLUMINESCENCE, SEPARATION, ELECTRONS, DEFECTS, APATITE, SAMPLES
  • Ankara Üniversitesi Adresli: Evet

Özet

The purpose of the present study is to identify the effect of the increasing temperature IR stimulation to the component-resolved OSL luminescence signal of mixed quartz-feldspars material. Post IR OSL signals measured at 110 degrees C were analysed via only general order kinetic terms, while IR signals obtained at increasing temperatures were de-convolved using the sum of general order kinetics plus a tunnelling component. By increasing stimulation temperature, it was demonstrated that IRSL at temperatures above 50 degrees C does not only stimulate feldspar but also stimulates both fast and medium quartz OSL components. In the temperature range between 175 and 250 degrees C, the IRSL initial intensity is dominated by the fast OSL component. Estimated equivalent doses using either Post-IR175 center dot OSL110 as well as IRSL175 (with the indices indicating the measurement temperature) are in good agreement between each other, due to both stimulating quartz. Finally, the physical meaningfulness of the fitting parameters for the tunnelling component is also discussed. (C) 2014 Elsevier Ltd. All rights reserved.