Resonant Multiphoton Ionization of a Cesium Atomic Beam by a Tunable-WavelengthQ-Switched Neodymium-Glass Laser

Abstract
The narrow spectral bandwith (0.4 Å) of a Nd-glass laser was tuned over a range of 40 Å to populate selectively the 6f level of cesium atoms. The resulting variation of the multiphoton ionization probability was investigated as a function of the laser wavelength.