THE IDENTIFICATION OF THE CA 3D4F AUTOIONIZING LEVELS BY THE APPLICATION OF MULTIPHOTON POLARIZATION SELECTION-RULES

We have used angular momentum selection rules to identify the J-levels of the Ca 3d4f autoionizing states. These levels were observed in one - plus two-photon resonance excitation directly to the autoionizing st ate using two different lasers. By choosing the appropriate combinatio n of polarizations for the two lasers, we were able to provide positiv e identification for all of the J = 1, 2 and 3 levels observed. Our as signments extend those reported in the literature to the J = 2 levels.