Processes of Multiphoton Ionization of Cs2in the Wavelength Range 620–670 nm

Abstract

The relative production rates of Cs 2 + ions produced through two-photon ionization of cesium dimers Cs 2 were measured in the wavelength range 620–670 nm. The calculated production rates of Cs 2 + ions produced via the intermediate state C 1 Π u from X 1 Σ g + agreed fairly well with the experimental results. The production rates via the intermediate state 1 Σ u + , which is close to C 1 Π u , were calculated. The calculated results, however, showed the completely different function of wavelength from that of the experimental results. Thus we concluded that C s 2 + ions are mainly produced by the processes via the intermediate state C 1 Π u . It was made clear that most of the cesium dimers Cs 2 excited in the super excited states Cs 2 ** by absorption of two photons are autoionized to produce Cs 2 + ions.