NEUTRON REFLECTION FROM AMORPHOUS HYDROGENATED CARBON FILMS M.J. GRUNDY, R.M. RICHARDSON, G. BEAMSON, W.J. BRENNAN, J. HOWARD et M. O'NEILL J. Phys. Colloques, 50 C7 (1989) C7-197-C7-201 DOI: 10.1051/jphyscol:1989720