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Title: CVD diamonds as thermoluminescent detectors for medical applications
Authors: Marczewska, B
Olko, P
Waligorski, MPR
Kerremans, Y
Issue Date: 2002
Source: RADIATION PROTECTION DOSIMETRY, 101(1-4). p. 485-488
Abstract: Diamond is believed to be a promising material for medical dosimetry due to its tissue equivalence, mechanical and radiation hardness, and lack of solubility in water or in disinfecting agents. A number of diamond samples, obtained tinder different growth conditions at Limburg University, using the chemical vapour deposition (CVD) technique, was tested as thermoluminescence dosemeters. Their TL glow curve, TL response after doses of gamma rays. fading. and so on were studied at dose levels and for radiation modalities typical for radiotherapy. The investigated CVD diamonds displayed sensitivity comparable with that of MTS-N (Li:Mg,Ti) detectors, signal stability (reproducibility after several readouts) below 10% (1 SD) and no fading was found four days after irradiation. A dedicated CVD diamond plate was grown, cut into 20 detector chips (3 X 3 X 0.5 mm) and used for measuring the dose-depth distribution at different depths in a water phantom, for Co-60 and six MV X ray radiotherapy beams. Due to the sensitivity of diamond to ambient light, it was difficult to achieve reproducibility comparable with that of standard LiF detectors.
Notes: Inst Nucl Phys, PL-31342 Krakow, Poland. Limburgs Univ Centrum, Inst Mat Res, Krakow, Poland. Ctr Oncol, Krakow, Poland. Sci & Tech Res Ctr Diamond, B-2500 Lier, Belgium.Marczewska, B, Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
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ISSN: 0144-8420
e-ISSN: 1742-3406
ISI #: 000178899900099
Category: A1
Type: Journal Contribution
Validations: ecoom 2003
Appears in Collections:Research publications

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