12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone
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A synthetic diamond probe for both low-energy mammography X-rays and high-energy electron therapy beams

Presented by Mr. Nicholas ADE on 15 Jul 2011 from 11:00 to 11:15
Type: Oral Presentation
Session: Applied
Track: Track F - Applied and Industrial Physics


<p>Although diamond has been studied for dosimetry principally due to its near tissue-equivalence, its use in both low-energy X-rays and high-energy electron beams has not been reported. This report is based on dosimetric studies of a synthetic diamond probe when subjected to diagnostic mammography X-ray photons and megavoltage electron therapy beams. The probe, constructed using entirely tissue-equivalent Perspex body was configured for radiation dose measurement in either ‘edge-on’ or ‘flat-on’ exposure geometry without having first, to re-orientate the diamond within the body of the detector, and it was designed to be compatible with commercial electrometer systems. The radiation response of the diamond tested showed negligible energy dependence; its minimal background signal, high sensitivity (547.52 nC Gy<sup>-1</sup>mm<sup>-3</sup>) and suitability for measurements in small radiation fields of steep dose gradients due to its small size make it suitable for clinical dosimetry. The presented probe has the potential advantage of replacing conventional radiation dosimeters.

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Short Paper



Room: Acro3

Primary authors



  • Prof. Tom NAM Member, DST/NRF Centre of Excellence in Strong Materials, University of the Witwatersrand