Individual cross sections for 1D2 sublevels (ML=0, ±1, ±2) in the alignment‐dependent process: Ca(4p2 1D2)+Rg→Ca(3d4p 1F3)+Rg as a function of rare gas

摘要: The Ca(4p2 1D2) state is prepared in a two‐step excitation with linearly polarized lasers. Two different angular wave functions are selected, Y2,0 or (Y2,−1−Y2,1)/, by using parallel perpendicular laser polarizations, respectively. Subsequent collision rare gas atom (He, Ne, Ar, Kr, Xe) populates the near‐resonant Ca(3d4p 1F3) state. dependence of collisional energy transfer process measured as function alignment initial 1D2 respect to average relative velocity vector. laser‐selected and (Y2,−1−Y2,1)/ display dramatically dependences, which understood an analysis rotation properties these functions. contributions cross section individual sublevels, ML=0, ±1, ±2, extracted, vary considerably depending on gas. For He, ML=±2 sublevel (asymptotic Δ molecular state) contributes most total section, while for all other gases, ±1 sublevels Σ Π states, respectively) more important. contribution ML=0 increases smoothly increasing mass partner, becoming largest contributor Xe.