Photodissociation Dynamics Of Ar-2+ And Ar-3+ Excited By 527 Nm Photons

The photofragmentation dynamics of Ar-2+ and Ar-3+ clusters has been investigated at a 527 nm wavelength (2.35 eV) using a setup that allows simultaneous detection of the ionic and neutral fragments in a coincidence experiment. Measurement of positions and times of flight enables in principle a complete description of the fragmentation dynamics. The photofragmentation dynamics of Ar-3+ clusters is similar to that of Ar-2+ with, in addition, the ejection of a third fragment that can be neutral or ionized via a resonant electron capture. This is attributed to the triangular geometry of the Ar-3+ ion.