CVD diamond for medical dosimetry applications

Citation
Aj. Whitehead et al., CVD diamond for medical dosimetry applications, NUCL INST A, 460(1), 2001, pp. 20-26
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
460
Issue
1
Year of publication
2001
Pages
20 - 26
Database
ISI
SICI code
0168-9002(20010311)460:1<20:CDFMDA>2.0.ZU;2-1
Abstract
Diamond is potentially a very suitable material for use as a radiation dosi meter; the wide band gap results in low dark currents and low sensitivity t o visible light, the high carrier mobilities can give rapid response, the v ery high density of strong bonds in the crystal structure make diamond very resistant to radiation damage and it is tissue equivalent. Recent advances in the synthesis of polycrystalline diamond by chemical vapour deposition (CVD) techniques have allowed material with electronic properties suitable for dosimetry applications to be consistently produced. This paper reports on simple dosimeters which have been fabricated from CVD diamond plates wit h Cr-Au electrodes in a sandwich configuration. The performance of the devi ces is compared with a silicon diode dosimeter and a commercial natural dia mond dosimeter in tests using 250 kV X-rays from a clinical source. (C) 200 1 Elsevier Science B.V. All rights reserved.