Session 5 Chairman: J. Sitek M. Seberíni Improving performance of Mössbauer transducer with sawtooth velocity shape S. Semenko, B. Sopko Annealing and identification of the radiaton defects in silicon B. Sopko, V. Sopko, D. Chren, L. Pína, K. Blažek, A. Blažek, V. Touš RTG microscopy J. Dekan, V. Slugeň, J. Lipka, I. Tóth Identification of corrosion products in VVER-440 steam generator using MÖSSBAUER spectrometry B. Zaťko, F. Dubecký, P. Boháček, J. Huran, V. Nečas Spectrometric performance study of semi-insulating GaAs radiation detector at reduced temperatures A. Bajusová, G. Králik, M. Miglierini Planning of external radiotherapy A. Grusková, J. Sláma, M. Ušáková, J. Sitek, M. Šoka, V. Jančárik Mössbauer study of Be-substituted NiZn ferrites M. Ladzianský, A. Šagátová, V. Nečas, F. Dubecký, D. Kindl Neutron irradiated detectors based on semi-insulating GaAs studied by means of picts