High-resolution zero-kinetic-energy photoelectron spectroscopy of nitric oxide

Rotationally selective photoionization dynamics for the transition $\left(\mathrm{N}{\mathrm{O}}^{+}\right)X{}_{}{}^1{}_{}{}^{}\Sigma _{}^{+}{}_{}{}^{}(v^{+}=0, N^{+})\leftarrow \left(\mathrm{NO}\right)A{}_{}{}^2{}_{}{}^{}\Sigma _{}^{+}{}_{}{}^{}(v=0, N_A, J_A=N_A+\frac{1}{2})$ is studied by high-resolution zero-kinetic-energy photo-electron spectroscopy (ZEKE-PES). Two-photon, two-color photoionization via the NO $A$ state in a skimmed supersonic jet is employed in the experiments. The observed angular momentum transfer ion←molecule is found to depend strongly on the initial quantum number $N_A$. The ionization potential is determined to be 74719.0±0.5 ${\mathrm{cm}}^{-1\mathrm{}}$.