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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/16980

Title: On the dose response of some CVD diamond thermoluminescent detectors
Authors: Marczewska, B.
Bilski, P.
Olko, P.
Nesladek, M.
Rebisz, M.
Guerrero, M. J.
Issue Date: 2006
Citation: RADIATION PROTECTION DOSIMETRY, 119 (1-4), p. 319-322
Abstract: The linearity of dose response of chemical vapour deposition (CVD) diamonds grown at the Institute for Materials Research at Limburg University, Belgium, was investigated over a dose range relevant for radiotherapy. The following CVD diamonds were investigated: (1) a batch of square 3 x 3 mm(2) detectors cut from a CVD wafer and (2) an as-grown CVD wafer of 6 cm diameter. A total of 20 CVD square detectors were irradiated with Cs-137 gamma rays over the dose range from 200 mGy to 25 Gy. The CVD wafer, used as a large-area thermoluminescent (TL) detector, was exposed to a Ra-226 needle. Very few square detectors showed linearity over a limited dose range, followed by saturation of the TL signal. The dose range of linearity was found to be strongly affected by the thermal annealing procedure of the detector. Owing to its high sensitivity and homogeneity of response, the large CVD diamond wafer was found to be very suitable as a large-area detector for 2-D dose mapping of the Ra-226 brachytherapy source, possibly for Quality Assurance purposes.
Notes: Inst Nucl Phys, PL-31342 Krakow, Poland. Univ Limburg, Inst Mat Res, Belgium
URI: http://hdl.handle.net/1942/16980
DOI: 10.1093/rpd/nci638
ISI #: 000240691100069
ISSN: 0144-8420
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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