Lifetime-vibrational interference in the autoionization of core-excited O/sub 2/

Journal Article · Tue Nov 15 04:00:00 EST 1988 · J. Chem. Phys.; (United States)

OSTI ID:6798249

Carroll, T X; Thomas, T D

The electron--electron coincidence technique has been used to measure the spectrum of autoionizing (Auger) electrons that are emitted following excitation of a core (1s) electron in O/sub 2/ to the half-filled 1..pi../sub g/ orbital. The highest kinetic energy peak in the deexcitation spectrum corresponds to a transition to the ground state of O/sup +//sub 2/(X,/sup 2/Pi/sub g/). The energy, width, and shape of the observed peak cannot be described by pure Franck--Condon vibrational calculations. Because the lifetime for deexcitation is comparable to a vibrational period, interference between vibrational levels in the core-excited state must be taken into account in calculating the transition profile. When this is done the agreement between observed and calculated line shapes is excellent.

• Research Organization: Oregon State University, Corvallis, Oregon 97331
• OSTI ID: 6798249
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 89:10; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AUGER EFFECT
AUTOIONIZATION
COINCIDENCE METHODS
COLLISIONS
COUNTING TECHNIQUES
DE-EXCITATION
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
INNER-SHELL EXCITATION
IONIZATION
LINE WIDTHS
MOLECULE COLLISIONS
NONMETALS
OXYGEN
VIBRATIONAL STATES