Non--Franck-Condon effects induced by orbital evolution and Cooper minima in excited-state photoionization of OH

Journal Article · Mon Feb 20 04:00:00 EST 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.62.889· OSTI ID:6343120

Stephens, J A; McKoy, V

We show that strong non--Franck-Condon effects can arise from photoionization of molecular Rydberg orbitals which evolve rapidly with internuclear distance and display Cooper minima in their photoelectron spectrum. The non--Franck-Condon mechanism should be most pronounced in excited-state photoionization of diatomic hydrides. The mechanism is illustrated with specific ab initio predictions of ion vibrational distributions for a proposed (3+1) one-color or (2+1)= two-color resonant multiphoton ionization measurement of OH via the D/sup 2/..sigma../sup -/(1..pi../sup 2/5sigma) state.

• Research Organization: Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena, California 91125
• OSTI ID: 6343120
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 62:8; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
DISTANCE
ENERGY LEVELS
EXCITED STATES
FRANCK-CONDON PRINCIPLE
HARTREE-FOCK METHOD
HYDROGEN COMPOUNDS
HYDROXIDES
INTERATOMIC DISTANCES
IONIZATION
MULTI-PHOTON PROCESSES
OPTIMIZATION
OXYGEN COMPOUNDS
PHOTOIONIZATION
RESONANCE ABSORPTION
RYDBERG STATES