Reflection of low energy hydrogen from carbon at oblique incidence
The particle reflection coefficient is determined experimentally and by computer simulation for the bombardment of two different kinds of carbon with deuterium at normal oblique incidence in the energy range from 1 keV down to 33 eV. Highly oriented pyrolytic graphite (HOPG) and EK98 graphites served as targets, the former as an example with a relatively flat surface, the latter with a rough surface topography. The experimental technique is based on the measurement of the trapped amount by nuclear reaction analysis using the reactions d(3He,p)alpha; protons are detected with a surface barrier detector. It is found that the usual assumption of complete trapping at low fluences is not fulfilled at low energies (well below 100 eV). Experimentally determined coefficients for HOPG and for EK98 agree reasonably well with those calculated by the programs TRIM.SP (TRVMC) and VFTRIM respectively.
Bibliographic Reference: Article: Journal of Applied Physics, Vol. 77 (1995) No. 12, pp. 6609-6615
Record Number: 199511058 / Last updated on: 1995-08-18
Original language: en
Available languages: en