Determination of the irradiation field at the research reactor TRIGA Mainz for BNCT

For the application of the BNCT for the excorporal treatment of organs at the TRIGA Mainz, the basic characteristics of the radiation field in the thermal column as beam geometry, neutron and gamma ray energies, angular distributions, neutron flux, as well as absorbed gamma and neutron doses must be determined in a reproducible way. To determine the mixed irradiation field thermoluminescence detectors (TLD) made of CaF2:Tm with a newly developed energy-compensation filter system and LiF:Mg,Ti materials with different 6Li concentrations and different thicknesses as well as thin gold foils were used.