Journal article
Model of ambient dose equivalent for radium contamination: Dependence on the geometry of the source.
- Desorgher L Institute of Radiation Physics (IRA), Lausanne University Hospital, Lausanne, Switzerland. Electronic address: laurent.desorgher@chuv.ch.
- Bochud F Institute of Radiation Physics (IRA), Lausanne University Hospital, Lausanne, Switzerland.
- Flury T Swiss Federal Office of Public Health, Switzerland.
- Murith C Swiss Federal Office of Public Health, Switzerland.
- Baechler S Swiss Federal Office of Public Health, Switzerland.
- Bailat C Institute of Radiation Physics (IRA), Lausanne University Hospital, Lausanne, Switzerland.
- 2018-04-21
Published in:
- Journal of environmental radioactivity. - 2018
English
Industrial activities involving radium sources, such as watchmaking, were still common up until the 1960s. They produced contaminations in building materials and the soil in a large variety of geometries. The potential remediation of such places requires instruments that are properly calibrated as well as adequate procedures. We have developed a model that estimates the rate of ambient dose equivalent H˙∗(10) at 10 cm and 1 m from a source of 226Ra and its progeny in both the soil or the building materials. Our model, described here, uses Monte Carlo (GEANT4) computed yield functions of H˙∗(10) per unit activity induced by point-like sources in different contaminated materials. Fit functions of the yield curve of H˙∗(10) are provided for outdoor contamination. The model can be used for any geometrical activity distribution and we present an example showing the dependency of H˙∗(10) on the diameter and the depth profile of the sources, for both outdoor and indoor contamination.
- Language
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- English
- Open access status
- closed
- Identifiers
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- DOI 10.1016/j.jenvrad.2017.12.011
- PMID 29674154
- Persistent URL
- https://sonar.ch/global/documents/266499
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