Low energy reactive and dissociative collisions of the acetone cation CH3COCH3+ and its fragment ion CH3CO+ with a surface

The interaction of the parent acetone cation CH3COCH3+ and its ionic fragment CH3CO+ with a stainless steel surface covered with hydrocarbons has been studied as a function of the collision energy from about 0 up to 50 eV. In the case of CH3COCH3+ as projectile ion, the collisional interaction with the surface leads to the formation of protonated acetone and with increasing collision energies to fragment ions originating from both the protonated acetone ion (in particular, the production of CH2OH+) as well as the parent ion. These results have been confirmed using deuterated acetone ions. In the case of collisions of CH3CO+ with the surface only simple dissociative reactions of the projectile ion are observed.