RADIATION HARDNESS STUDIES ON SILICON DETECTORS IN FAST-NEUTRON FIELDS

Electrical and alpha-particle PHA damage tests for ELMA and SGS silicon detectors irradiated at two different fast neutron facilities, in the range of fluences from 10(10) to 10(15) n/cm(2) are presented. Results on depletion voltage, alpha damage constants and self-annealing are discussed. Supplementary damage effects due to nuclear reactions are evaluated, The spread of the data in the self-annealing corrected alpha damage constant versus hardness parameter plot shows the difficulty in comparing the results obtained in different neutron environments. A systematics is however possible, in the framework of standardization of the ''1 MeV equivalent'' neutron spectrum.