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Thermoluminescence characterization of newly developed Cu-doped lithium tetraborate materials

Authors
Journal
Radiation Physics and Chemistry
0969-806X
Publisher
Elsevier
Volume
81
Issue
9
Identifiers
DOI: 10.1016/j.radphyschem.2012.01.041
Keywords
  • Thermoluminescence
  • Cu-Doped
  • Lithium Tetraborate
  • Dose Range

Abstract

Abstract This work reports the thermoluminescence characterization of newly synthesized Li2B4O7 (LTB) and LTB:Cu materials of single crystal and glassy structure. The following basic properties were investigated: glow curve, dose response, fading, reproducibility and batch uniformity. The Cu doped samples and the non-doped single crystal gave TL response, while the non-doped glassy LTB did not up to 10kGy. LTB:Cu single crystals showed promising properties. Their glow curve consists of two well separated peaks (at 165°C and 270°C) in the 50–350°C temperature region. The sensitivity of this material is about 5 times higher than that of the TLD-100. The most attractive feature of these LTB:Cu single crystals is their linear dose response in a very wide range: from 0.3mGy to 10kGy. Unfortunately this material is sensitive to light; the fading of irradiated samples is very quick in daylight, but at room temperature and kept in dark the fading of the 270°C peak is less than 6%.

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