The quenching of the iodine fluorescence spectrum by various inert gases and oxygen has been studied with a view to obtaining information on the efficiencies of vibration energy transfer processes in this system. Preliminary results here presented are in agreement with earlier work of Rössler and Eliaschevich and indicate that the transfer processes are very efficient. A kinetic scheme is proposed to account for the various possible quenching and transfer processes and it is shown that this is in agreement with experimental results.