REFLECTIVITY MEASUREMENTS OF SYNTHETIC MULTILAYERS IN THE 1-5 nm WAVELENGTH RANGE J. J. BONNET, M. G. SURAUD, M. CHASSEVENT, M. BONNEFOY, A. FLEURY, F. BONNET et S. BLIMANJ. Phys. Colloques, 48 C9 (1987) C9-117-C9-121DOI: https://doi.org/10.1051/jphyscol:1987919