Single-photon threshold photoionization of NO

Publisher Website
Google Scholar
Abstract
Single-photon threshold photoionization spectra for jet-cooled NO have been measured for the v+=0 and 1 vibrational levels of the X 1Σ+ ground state of NO+. The NO+ rotational state distribution for the v+=0 level is shown to be perturbed by nearby autoionizing levels, whereas the v+=1 level exhibits a cation rotational distribution which is in near quantitative agreement with calculated spectra near threshold. Only small changes in total angular momentum are observed (‖ΔJ‖=‖J+−J″‖≤5/2) even though a wide range of photoelectron angular momenta (l=0–3) are predicted to contribute to the near-threshold photoelectron continua. The present results are also discussed in light of recently published two-photon threshold photoionization spectra of NO which exhibit nearly identical NO+ rotational state distributions.