Investigation of dissociation of chlorine molecule using microwave generator

The dissociation of chlorine molecule has been detected by dissociating the mixture of Cl2 and Ar in the microwave generator. The chlorine atom concentration increased when the pressure of the reactor cell various from 200Pa to 253Pa, we get the Cl2 dissociation over 8% at 256Pa. However, the value dropped rapidly with further increasing the pressure of the cell. It is probably due to the fast recombination rate of the Cl atom at high pressure.