Observation of Autler-Townes splitting in the multiphoton ionization of H/sub 2/: Measurement of vibronic transition moments between excited electronic states

Journal Article · Thu Oct 15 04:00:00 EDT 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.36.4107· OSTI ID:6117755

Quesada, M A; Lau, A M.F.; Parker, D H; Chandler, D W

We report the first observation of Autler-Townes splitting in multiphoton ionization of molecules and its application to measure vibronic transition moments between excited electronic states. The effect was observed in the two-color four-photon ionization of H/sub 2/ via the resonant levels E,F /sup 1/..sigma../sub g//sup +/, v = 6, J = 1 and D /sup 1/Pi/sub u/, v = 2, J = 2. Calculations give good fits to the observed spectra. They yield a vibronic transition moment of 2.0 +- 0.5 a.u. between the above excited states, in agreement with the ab initio value 1.97 a.u. calculated by Huo and Jaffe.

• Research Organization: Department of Chemistry, University of California, Santa Cruz, California 95064
• OSTI ID: 6117755
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 36:8; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AMPLITUDES
ELEMENTS
EMISSION SPECTRA
ENERGY LEVELS
EXCITED STATES
FINE STRUCTURE
HYDROGEN
IONIZATION
MOLECULES
MULTI-PHOTON PROCESSES
NONMETALS
PHOTOIONIZATION
SPECTRA
TRANSITION AMPLITUDES
VIBRATIONAL STATES