A.C. STARK SHIFT AS A PROBE TO MEASURE A LASER POWER DENSITY DISTRIBUTION AND ITS APPLICATION TO MULTI-PHOTON IONIZATION P. Kruit, J. Kimman, H. G. Muller et M.J. Van der WielJ. Phys. Colloques, 43 C2 (1982) C2-457-C2-459DOI: https://doi.org/10.1051/jphyscol:1982241