Kinetic-energy- and angular-resolved fragmentation of CO in vibrational-resolved C 1sexcitation

Angular distributions of C⁺+O⁺ from CO were measured, following vibrationally resolved C 1s excitations into the 2p{π}, 3s{σ}, and 3p{π} orbitals as well as into higher unresolved orbitals. A time-of-flight mass spectrometer, with a multihit-type position-sensitive anode, was used for the measurements. The anisotropy parameters ({β}) of C⁺+O⁺ approach their theoretically expected values as the released kinetic energy in the fragmentation increases. The value of the {β} parameters remains constant for all vibrational states within each orbital. {} 1996 The American Physical Society.