Laser-induced quadrupole—quadrupole collisional energy transfer in Xe—Kr

Abstract

By considering the relative velocity distribution function and multipole expansion interaction Hamiltonian, a three-state model for calculating the cross section of laser-induced quadrupole—quadrupole collisional energy transfer is presented. Calculated results in Xe—Kr system show that in the present system, the laser-induced collision process occurs for ∼4 ps, which is much shorter than the dipole—dipole laser-induced collisional energy transfer (LICET) process. The spectrum of laser-induced quadrupole—quadrupole collisional energy transfer in Xe—Kr system has wider tunable range in an order of magnitude than the dipole—dipole LICET spectra. The peak cross section decreases and moves to the quasi-static wing with increasing temperature and the full width at half peak of the profile becomes larger as the system temperature increases.