Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Investigation of the Neutron Stray Radiation Field Produced by Irradiating a Water Phantom with 200-MeV Protons
Ist Teil von
Nuclear technology, 2011-07, Vol.175 (1), p.77-80
Ort / Verlag
La Grange Park, IL: Taylor & Francis
Erscheinungsjahr
2011
Quelle
Taylor & Francis
Beschreibungen/Notizen
Proton therapy is a widely used method of cancer treatment. Undesired secondary particles such as neutrons accompany the irradiation. Depending on the measurement position, the expected main dose contribution due to undesired secondary particles arises from neutrons with energies >20 MeV. Conventionally used Andersson and Braun-type survey instruments may underestimate the ambient dose equivalent up to a factor of 2 due to their limited response for high-energy neutrons. Therefore, it is desirable to investigate the neutron stray field in conditions comparable to therapy treatment, in particular the resulting dose to equipment placed in the treatment vault to estimate possible consequences to its operation. The irradiation of a water phantom with 200-MeV protons adequately reproduces these conditions.