Heteronuclear energy pooling collisions: The Na(3P) + K(4P) reaction

Abstract An experiment has been performed in which two different atomic species - sodium and potassium - have been simultaneously excited in a cell by two resonant cw dye lasers and the fluorescence spectrum has been analysed by using an intermodulation technique to isolate the contributions due to the heteronuclear processes. The energy pooling collisions between Na(3P) and K(4P) have been observed for the first time and the relative collision cross sections have been measured.