ATOMIC INTERACTION WITH QUANTUM FLUID CLUSTERS : 3He-CLUSTER BEAM GENERATION AND Cs-SCATTERING BY4He-CLUSTERS J. GSPANN, G. KRIEG et H. VOLLMAR J. Phys. Colloques, 38 C2 (1977) C2-171-C2-173 DOI: 10.1051/jphyscol:1977236