Shape resonance influence on the photoelectron angular distributions from O/sub 2/ C /sup 3/Pi/sub g/, v = 0--3

Journal Article · Sat Oct 01 04:00:00 EDT 1988 · J. Chem. Phys.; (United States)

OSTI ID:6956644

Miller, P J; Chupka, W A; Winniczek, J; White, M G

Vibrationally resolved, photoelectron angular distributions are reported for the (2+1) REMPI of the C /sup 3/Pi/sub g/(3ssigma/sub g/), v' = 0--3 Rydberg levels of O/sub 2/. Ionization transitions leading to different vibrational final states (v/sup +/) of O/sup +//sub 2/ exhibit markedly different angular distributions, suggesting different ionization mechanisms. The experimental data are qualitatively reproduced by very recent ab initio calculations which attribute the non-Franck--Condon behavior to the presence of a ksigma/sub u/ shape resonance imbedded in the ionization continuum. Much of the remaining anomalous behavior is attributed to a Fano-type resonance in the Pi/sub u/ channel.

• Research Organization: Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06511-8118
• OSTI ID: 6956644
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 89:7; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
DISTRIBUTION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
EXCITED STATES
IONIZATION
MULTI-PHOTON PROCESSES
NONMETALS
OXYGEN
PHOTOELECTRON SPECTROSCOPY
PHOTOIONIZATION
RYDBERG STATES
SPECTROSCOPY