Accession Number:

ADA002438

Title:

Predissociation of the Schumann-Runge Bands of O2.

Descriptive Note:

Memorandum rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Julienne,Paul S.
• Krauss,M.

Report Date:

1974-10-01

Pagination or Media Count:

27.0

Abstract:

The predissociation line broadening in the Schumann-Runge bands of O2 is explained by an ab initio calculation of the pertinent repulsive potential energy curves and spin-orbit matrix elements. The ab initio results provide an overall qualitative picture of the predissociation which is further refined through a detailed comparison with experiment. The dominant repulsive curve is also deduced by a deperturbation of the level shift in the second vibrational difference. The predissociation is dominated by the quintet Piu state crossing the B triplet sigma u- state around 1.87A with a spin-orbit matrix element of 65cm. The apparent experimental widths between v 5 and 11 are shown to be inconsistent with the theoretical analysis, the difference probably being due to line blending.

Descriptors:

• *OXYGEN
• *ABSORPTION SPECTRA
• QUANTUM THEORY
• POTENTIAL ENERGY
• DISSOCIATION
• SPECTRUM ANALYSIS
• MOLECULAR ENERGY LEVELS
• ULTRAVIOLET SPECTRA

Subject Categories:

• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE