Single-photon threshold photoionization of NO

Creators: Wiedmann, Ralph T.; White, Michael G.; Wang, Kwanghsi; McKoy, V.

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.

Additional Information

© 1993 American Institute of Physics. (Received 18 December 1992; accepted 3 February 1993) Work at Brookhaven National Laboratory was supported under Contract No. DE-AC02-76CH00016 with the U.S. Department of Energy and by its Division of Chemical Sciences, Office of Basic Energy Sciences. Work at the California Institute of Technology was supported by grants from the National Science Foundation, Air Force Office of Scientific Research, and the Office of Health and Environmental Research of the U.S. Department of Energy. We also acknowledge use of resources of the Jet Propulsion Laboratory/California Institute of Technology Y-MP2E/116 Supercomputer.

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