| We report 644 absolute level-to-level inelastic and reactive constants for the L7i*2 A1S+u (νi, ji) + 7Li → L7i*2 A1S+u (ν', j') + 7Li system with initial molecular quantum numbers νi = 2 and ji = 3, 11, and 19. We collected 87 rate constants for rotationally inelastic and vibrationally elastic collisions, 281 rate constants for vibrationally inelastic collisions, and 276 constants for exchange reactions with final vibrational levels from ν f = 0 to νf = 3. Inelastic collisions are characterized by even changes in rotational quantum number, j , and exchange reactions are identified by odd Δj. Level-to-level rate constants for even Δj inelastic collisions show distributions similar to those in rare gas collisions with the excited Li2 molecule. The ECS (energy corrected sudden) scaling law of DePristo, et al., fit the vibrationally elastic data well. Reactive rate constant results are characterized by a statistical distribution for Δν of 0, -1, and -2 at a substantially reduced effective temperature consistent with a kinematic model proposed by Picconatto et al. Fitting quasiclassical trajectory studies to the data using a modified LEPS potential surface provide first insights into the parameters of the excited-state Li3* three-body potential. |
