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CVD Diamond Applications as TL Radiation Dosimeters

Published online by Cambridge University Press:  01 February 2011

M. Pedroza-Montero ,
R Melendrez ,
V Chernov ,
M. Pedroza-Montero ,
S Gastelum  and
E Cruz-Zaragoza
M. Pedroza-Montero
Affiliation:
mpedroza@cajeme.cifus.uson.mx, Universidad de Sonora, DIFUS, P. O. Box 5-088, Hermosillo, Sonora, México, AZ, 83190, Mexico, 52 662 259 2156, 52 662 212 6649
R Melendrez
Affiliation:
rodrigo@cajeme.cifus.uson.mx, Universidad de Sonora, DIFUS, P. O. Box 5-088, Hermosillo, Sonora, México, 83190, Mexico
V Chernov
Affiliation:
chernov@cajeme.cifus.uson.mx, Universidad de Sonora, DIFUS, P. O. Box 5-088, Hermosillo, Sonora, México, 83190, Mexico
M. Pedroza-Montero
Affiliation:
mpedroza@cajeme.cifus.uson.mx, Universidad de Sonora, DIFUS, P. O. Box 5-088, Hermosillo, Sonora , México, 83190, Mexico
S Gastelum
Affiliation:
sandrag@posgrado.cifus.uson.mx, Universidad de Sonora, DIFUS, P. O. Box 5-088, Hermosillo, Sonora, México, 83190, Mexico
E Cruz-Zaragoza
Affiliation:
ecruz@nucleares.unam.mx, Universidad Autonoma de Mexico, Instituto de Ciencias Nucleares, A. P. 70-543, Mexico, DF, 04510, Mexico
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Abstract

The extraordinary characteristics of chemically vapor deposited (CVD) diamond such as tissue equivalence, radiation hardness, and lack of solubility in water; makes CVD diamond a very promising material for radiation dosimetry applications. Recent investigations have shown that CVD techniques allowed the growing of good quality diamond films in a diversity of substrates to be used in the form of ionization chambers, thermoluminescence (TL) detectors and dosimeters. In the present work, we report on the TL properties of MWCVD diamond exposed to gamma radiation in the 0.05 -1.0 kGy dose range and 43.5 and 81.11 Gy min−1 dose rates. The CVD diamond displays a linear dose behavior and 5% TL cycle reproducibility, without requiring any annealing or thermal treatment before using it as TL dosimeter. In spite of the significant results, some problems remain and a lot of research work is necessary to improve the synthetic material characteristics to optimize the TL/OSL radiation dosimeter properties.

Keywords

chemical vapor deposition (CVD) (deposition)diamondradiation effects
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1039: Symposium P – Diamond Electronics–Fundamentals to Applications II , 2007 , 1039-P15-46
Copyright
Copyright © Materials Research Society 2008

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