Threshold photoelectron spectra of atmospheric molecules. I. Description of method and application to H/sub 2/, D/sub 2/, and N/sub 2/

Journal Article · Thu Mar 01 04:00:00 EST 1979 · J. Chem. Phys.; (United States)

OSTI ID:6462523

Stockbauer, R

Threshold photoelectron spectra (TPES) are presented for H/sub 2/, D/sub 2/, and N/sub 2/ with a resolution of 28 meV full width at half maximum. The results are compared with Franck--Condon transition probabilities, previous TPES and electron attachment threshold photoelectron spectra. Peaks in the TPES not predicted by Franck--Condon calculations are explained by autoionization processes. These processes in N/sub 2/ make possible the observation of vibrational levels of the ions not visible spectroscopically or in photoelectron spectra. A shift of the TPES peaks in N/sub 2/ toward lower energy is explained by conversion of rotational energy in the ionization transition. Peaks between the v=O and v=1 vibrational levels of the X /sup 2/..sigma../sub g//sup +/ state of N/sub 2//sup +/ consist of near monoenergetic electrons implying little or no change in the rotational quantum number in the autoionization process.

• Research Organization: National Measurement Laboratory, National Bureau of Standards, Washington, DC 20234
• OSTI ID: 6462523
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 70:5; 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
CRYOGENIC FLUIDS
DATA
DATA FORMS
DEUTERIUM
ELECTRON SPECTROSCOPY
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GRAPHS
HYDROGEN
HYDROGEN ISOTOPES
INFORMATION
IONIZATION
ISOTOPES
LIGHT NUCLEI
NITROGEN
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RESOLUTION
SPECTRAL SHIFT
SPECTROSCOPY
STABLE ISOTOPES