Coincidence Doppler broadening spectroscopy in Fe, Fe–C and Fe–Cu after neutron irradiation

In the framework of the European project PERFECT, dealing with the modelling of irradiated material behaviour, well controlled irradiations have been performed at 300 C for doses ranging from 0.025 to 0.2 dpa. At this stage, four modelalloys (Fe, Fe–C, Fe–0.1 wt%Cu, Fe–0.3 wt%Cu) have been investigated by Coincidence Doppler Broadening of positron annihilation radiation (CDBAR), a well established tool for studying defects in materials. The results demonstrate the effect of Cu on the matrix damage accumulation under neutron irradiation.