Samples were bombarded with 0.2 to 0.6MeV ions (70% C+, 30% H+), using current pulses of 20 to 250A/cm2 and durations of 60 to 100ns, to fluences of 1 to 6J/cm2. At current densities greater than 90A/cm2 there appeared, in addition to the usual increase in microhardness in the irradiated region, a second peak at between 40 and 100% of the ion-beam range. This anomalous hardening introduced various deformation states, which were the result of the generation and interaction of point defects (interstitials, vacancies) and straight dislocations in the shock-wave field. The recoil nucleus method was used to analyze the deformation states after irradiation. Non-radiated and irradiated Pb samples were saturated with H gas, because Pb was not expected to react with H. The degree of H saturation was low in regions of compressive stress, because of the high concentration of interstitials, and was high in tensile-stressed regions, because of the high concentration of vacancies.

Study of Deformation States in Metals Exposed to Intense Pulsed-Ion Beams. A.D.Pogrebnjak, V.T.Shablya, N.V.Sviridenko, A.N.Valyaev, S.V.Plotnikov, M.K.Kylyshkanov: Surface and Coatings Technology, 1999, 111[1], 46-50