TY - JOUR
T1 - Dose responses of diamond detectors to monoenergetic X-rays
AU - Yin, Zaizhe
AU - Hugtenburg, Richard
AU - Green, Stuart
AU - Beddoe, Alun
PY - 2004/1/1
Y1 - 2004/1/1
N2 - The characterisation of a detectors response in the kilovoltage range is necessary to understand its response to scattered radiation in the megavoltage range. Scattered radiation is absorbed in the detector by the highly Z-dependent photoelectric process. Measurements of diamond detector response to highly filtered quasi-monoenergetic X-rays and synchrotron-generated monoenergetic photons have been performed revealing effects that relate to the presence of copper and silver used to form electrical contact with the crystal. A three-component model of energy absorption, utilizing tabulated cross-sections for C, Cu and Ag, is proposed and a calculation of phantom scatter factors for diamond detector is given. (C) 2003 Elsevier B.V. All rights reserved.
AB - The characterisation of a detectors response in the kilovoltage range is necessary to understand its response to scattered radiation in the megavoltage range. Scattered radiation is absorbed in the detector by the highly Z-dependent photoelectric process. Measurements of diamond detector response to highly filtered quasi-monoenergetic X-rays and synchrotron-generated monoenergetic photons have been performed revealing effects that relate to the presence of copper and silver used to form electrical contact with the crystal. A three-component model of energy absorption, utilizing tabulated cross-sections for C, Cu and Ag, is proposed and a calculation of phantom scatter factors for diamond detector is given. (C) 2003 Elsevier B.V. All rights reserved.
KW - diamond detector
KW - cavity theory
KW - megavoltage radiotherapy
UR - http://www.scopus.com/inward/record.url?scp=0242662364&partnerID=8YFLogxK
U2 - 10.1016/S0168-583X(03)01678-1
DO - 10.1016/S0168-583X(03)01678-1
M3 - Article
VL - 213
SP - 646
EP - 649
JO - Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions With Materials and Atoms
JF - Nuclear Instruments & Methods in Physics Research. Section B. Beam Interactions With Materials and Atoms
ER -