Rotationally inelastic collisions between N2 and rare gases: an extension of the angular momentum scaling law

Recently we proposed a new model describing rotationally inelastic collisions: the angular momentum and energy corrected sudden approximation (AECS) based on an effective angular momentum parameter lc=2ℏ limiting the possible amount of angular momentum transfer due to the restricted interaction time. In this work rotational energy transfer in N2 induced by collisions with rare gases (He, Ne, Ar and Kr) is investigated with time-resolved CARS. We find it necessary to complement the AECS model with an energy gap term that can be formulated without additional model parameters.