Positron Annihilation Measurements on Nuclear Reactor Pressure Vessel Steels L. van Hoorebeke, J. van de Velde, D. Segers, L. Dorikens-Vanpraet and S. SimulaJ. Phys. IV France, 05 C1 (1995) C1-171-C1-175DOI: https://doi.org/10.1051/jp4:1995120