Angle-resolved photoelectron spectroscopy of N/sub 2/O measured as a function of photon energy from 14 to 70 eV

Journal Article · Fri Jul 01 04:00:00 EDT 1983 · J. Chem. Phys.; (United States)

OSTI ID:5893977

Carlson, T A; Keller, P R; Taylor, J W; Whitley, T; Grimm, F A

Angle-resolved photoelectron spectra have been taken of the first four bands of N/sub 2/O, using photons from synchrotron radiation. From these data, the partial cross section and the angular distribution parameter ..beta.. have been obtained over a range of photon energies from 14 to 70 eV for the first four valence orbitals: 2..pi.., 7sigma, 1..pi.., and 6sigma. Calculations, based on the multiple scattering X..cap alpha.. method, also have been performed to obtain the partial cross sections and ..beta.. values for comparison with experiment. An important element in the understanding of these data is the presence of shape resonances particularly in the photoionization of the 7sigma and 6sigma orbitals. Although the calculations are not in good quantitative agreement with experiment, they are able qualitatively to give a correct account of the overall behavior. In the case of the photoelectron spectra of the 7sigma and 6sigma orbitals, the vibrationally resolved bands were studied independently, particularly for their ..beta.. values. Evidence of autoionization was found from detailed study of data on the 7sigma orbital. In addition, marked changes in ..beta.. over the vibrational envelope have been noted and possible explanations are advanced based on the effects of shape resonances and vibronic coupling.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 5893977
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 79:1; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
BREMSSTRAHLUNG
CHALCOGENIDES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ENERGY RANGE
EV RANGE
EV RANGE 10-100
IONIZATION
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
OXIDES
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RADIATIONS
SPECTROSCOPY
SYNCHROTRON RADIATION