Determination of the RBE for quasi-monoenergetic photon radiation and high energetic neutrons - 3605S04499
BFS-RESFOR 19/09 urn:nbn:de:0221-2009120407
Summary
Within the project, blood samples were irradiated in a quasi-monoenergetic photon beam (photon energy approx. 7 MeV) and several neutron beams (neutron energies approx. 100 MeV and 200 MeV) with absorbed doses in the range of 0.1 Gy to 1 Gy, to investigate the relative biological effectiveness (RBE) of high-energy photon and neutron radiation. Previously the absorbed dose rate to water was determined in these beams. Subsequently the frequency of the occurrence of dicentric chromosomes depending on the absorbed dose was determined and the RBE calculated. It was found that for photon radiation with energies above 6 MeV the RBE is about twice as large as for Co-60-gamma radiation. For neutrons with energies between 100 MeV and 200 MeV a RBE of about 10 was obtained.
