Thermoluminescent properties of CVD diamonds for radiation protection and radiotherapy applications

✍ Scribed by Marczewska, B. ;Tromson, D. ;Descamps, C. ;Bilski, P. ;Schirru, F. ;Nowak, T. ;Bogus, A.

• Book ID: 105364610
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 224 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200776316

✦ Synopsis

Abstract

Thermoluminescent properties of intrinsic CVD diamond samples synthesized with oxygen added in the gas phase during crystal growth were investigated. Sensitivity and linearity were evaluated over the 0.2–45 Gy dose range, using Cs‐137 and Co‐60 γ‐ray sources. Extremely high sensitivity was observed at doses exceeding 1 Gy, and poor reproducibility, the signal saturating at doses above 10 Gy. The TL properties of the studied crystals were improved by an annealing procedure (400 °C over 30 minutes) but with a significant decrease of the signal amplitude. The annealed detectors were very sensitive to radiation at doses exceeding 2 Gy and signal saturation was observed at doses above 25 Gy. A “quenching” effect of heating rate on the position and the amplitude of the dosimetric peak was also observed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)