ATTENUATION OF A STATIC POLARIZATION ECHO BY 4He FILM M. Poirier, J. D.N. Cheeke, P. Morisseau et A. HikataJ. Phys. Colloques, 42 C6 (1981) C6-876-C6-878DOI: https://doi.org/10.1051/jphyscol:19816260