The effect of vibrational excitation (3≤v″≤19) on the reaction Na₂ (v″)+Cl→NaCl+Na*

The variation of the total integral cross section for the chemiluminescent channel with the vibrational excitation 3≤v″≤19 is investigated using laser‐induced fluorescence or coherent population transfer, a new method employing delayed interaction with two cw lasers to populate vibrationally excited levels. The cross section increases with v″ by about 0.76% per vibrational level. The results are in agreement with the results of phase‐space calculations, as well as with those from simple curve crossing models.