State-to-state photoionization of VO: Propensity for large, positive changes in rotational quantum number

State-to-state threshold photoionization cross sections from specific spin–rotation levels N′=7, J′=8.5, v′=3 of C 4∑− VO to specific levels N+J+ of X 3∑− VO+ show a remarkable propensity for large, positive ΔN. Observed transitions span the ranges ΔN=−5 to +7 and ΔJ=−5.5 to +4.5. The adiabatic ionization potential of VO is 7.2386±0.0004 eV. The mean bond length of v+=0, X 3∑− VO+ is 1.561±0.003 Å.