NUCLEAR SCATTERING MEASUREMENTS OF COMPOSITION PROFILES IN a-Si : H MULTILAYER STRUCTURES C. Brassard, R. Groleau, J. L'Ecuyer, J.P. Martin, J.F. Currie, P. Depelsenaire, M. Wertheimer et A. Yelon J. Phys. Colloques, 42 C4 (1981) C4-795-C4-798 DOI: 10.1051/jphyscol:19814174