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Program Leader
Carl Ross
Phone: 613-993-9352x233
Fax: 613-952-9865
Email: Carl.Ross@nrc-cnrc.gc.ca
Ionizing Radiation Standards
Metrologists in the Ionizing Radiation Standards (IRS) laboratories disseminate, maintain, and develop standards for ionizing radiation, and conduct research and development related to the measurement of ionizing radiation. Major activities include the development of standards and measurement techniques related to: exposure and air kerma in low-energy x-ray and 60Co beams; absorbed dose to water in 60Co beams, as well as photon and electron beams from linear accelerators; neutron fluence and neutron dose equivalent; and absorbed dose to tissue in a β-ray field. The IRS program is also well known for its work in developing and exploiting Monte Carlo calculational techniques for the simulation of electron and photon transport in materials.
Water calorimetry standard for the absorbed dose to water
Accurate measurement of the absorbed dose to water in radiation beams is a critical component of cancer radiation therapy. [More]
IRS is teaming up in the area of gamma-ray imaging with the radiation mapping group from Natural Resources Canada and detector development experts at McGill University to develop a prototype gamma-ray imager for safety and security applications. [More]
The Monte Carlo method, as applied to the transport of ionizing radiation, uses known interaction cross sections along with statistical methods to track individual particles as they traverse matter. [More]
VMC++ is a Monte Carlo package optimized for radiation treatment planning. By restricting the energy range to that typical of radiation therapy and the materials to those representative of human tissue a significant speed improvement can be achieved over that of a general purpose Monte Carlo code. [More]
EGSnrc is a general purpose Monte Carlo code for electron and photon transport. It has been optimized for use in the energy range of interest to radiation therapy and medical imaging. [More]
BEAMnrc is a specialized user code that makes use of EGSnrc for simulating the treatment heads on linear accelerators used for cancer therapy. [More]
