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

摘要

Experimental investigation of laser-induced quadrupole-quadrupole collisional energy transfer between Xenand Kr is reported in this paper. The excitation spectrum of laser-induced collisional energy transfer (LICET)nis characterized by a slowly decreasing tail on the blue side of the peak and a width of ∼30 cm−1. Thenexperimental evidence shows that in the quasistatic wing the quadrupole-quadrupole LICET spectrum follows anpower law that is different from the dipole-dipole LICET line shape and the profile of the quadrupole-quadrupolenLICET decreases more slowly than the dipole-dipole LICET profile. The results indicate that the laser-inducednquadrupole-quadrupole collision can be considered as a practical process to transfer energy selectively from anstorage state making a parity-nonallowed transition to a target state making a parity-allowed transition.