Positive charge fractions of H, D, and He backscattered from solid surfaces

Abstract

Listen

Translate article

Positive charge fractions of H, D, and He with energies between 3–20 keV backscattered from polycrystalline Au, W, Mo, Ni, Ti, Si, C, WO 3, TiH 2 and Si 3N 4 surfaces were measured. For H and D no dependence on the penetration depth of the emerging particle has been observed. He shows higher charge fractions for particles backscattered from the surface compared to those emerging from the bulk. In the case of H and D compound targets yield higher charge fractions compared to the respective elemental targets. These experimental results are compared with the available results of other authors and discussed in the light of existing theoretical models.