The experimentally measured power, k, in the power function dependence of the multiphoton ionization probability W ∼ αIk has been found in this institute to be higher than the theoretical value of the number of photons, k0, absorbed in the ionization process, contrary to the result k<k0 of previous measurements. The variation of the power in different experimental circumstances is explained by multiphoton resonances with the atomic levels. The general dependence of the multiphoton ionization probability on the light intensity, measured over a wide range, deviates strongly from the power law dependence and can be used to determine the Stark shift of the atomic states involved.
ASJC Scopus subject areas
- Nuclear and High Energy Physics