Accession Number : ADP007077

Title :   Molecular Multiphoton Ionization,

Corporate Author : AT AND T BELL LABS HOLMDEL NJ

Personal Author(s) : GIBSON, G. n. ; Freeman, R. R. ; Mcllrath, T. J.

Report Date : 22 MAY 1992

Pagination or Media Count : 7

Abstract : Resonant multiphoton ionization (MPI) of nitrogen has been studied using photoelectron spectroscopy in the short-pulse regime. Both Rydberg and valence states are identified as intermediate resonances in the photoionization process, although the valence states are seen only at low intensity. It is shown that the vibrational structure of the Rydberg states acting as intermediate resonances cancels out in the photoelectron spectrum, leading to sharp atomic-like spectra, even at high intensities. Finally, the ionization of the 3 sigma sub g 1 pi sub u and 2 sigma sub u electrons are clearly distinguished.

Descriptors :   *PHOTOIONIZATION, *RESONANCE RADIATION, *ATOMIC SPECTRA, PHOTONS, PHOTOELECTRONS, LASER BEAMS, MOLECULES, SHORT WAVELENGTHS, COHERENT RADIATION, RARE GASES, COHERENT OPTICAL RADIATION, SPECTROSCOPY, SYMPOSIA.

Subject Categories : Nuclear Physics & Elementary Particle Physics
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE