Dissociative ion-pair formation in collisions of fast potassium atoms with benzene and fluorobenzene
J. Chem. Phys. , Volume 124 - Issue Article number: 54306 p. 1- 10
Using a crossed molecular-beam technique, electron transfer is studied in collisions of fast potassium atoms with benzene and fluorobenzene molecules. The negative fragment ions formed in the collision region are extracted by a pulsed voltage, and their masses and energy release distributions analyzed by a time-of-flight (TOF) method. The dominant fragment from C6H5F is F¯. The phenyl ring fragments CH¯ and C2H¯ are also observed but with lower intensities. In the case of C6H6 the dominant anionic specie is C2H¯. The kinetic-energy release distributions of the various fragments are derived from the width and shapes of the TOF peaks in the spectrum.