Nonlinear-spectroscopic studies of highly excited states of molecules in supersonic beams

Technical Report · Wed Apr 01 04:00:00 EST 1987

OSTI ID:6348527

Page, R H

The absorption spectrum of water dimers in the O-H stretching region (approx.3400 to 3800 cm/sup -1/) was obtained by monitoring vibrational predissociation. The O-H stretching frequencies of the dimer were shifted by hydrogen bonding. In a lower-resolution experiment, (H/sub 2/O)/sub 19/ clusters were studied. The effect of the cluster temperature on the absorption spectrum was discussed. Rotationally resolved photoionization spectra of H/sub 2/O and D/sub 2/O were obtained. Energies of some excited states were accurately determined. Autoionizing Rydberg series in the spectra were identified. XUV-UV and XUV-visible double-resonance experiments on H/sub 2/ are described. Two infrared-ultraviolet double resonance experiments on benzene were performed. This provided evidence that showed that the C-H stretching admixture contains four states instead of three. A reassignment of the benzene uv spectrum is suggested. A Fermi resonance in the excited state was also detected.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6348527
• Report Number(s): LBL-23307; ON: DE87012093
• 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
ABSORPTION SPECTRA
AROMATICS
BEAMS
BENZENE
DIMERS
DOUBLE RESONANCE METHODS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUID FLOW
HEAVY WATER
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
INFRARED SPECTRA
LASER SPECTROSCOPY
MOLECULAR BEAMS
MOLECULES
NONMETALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
RYDBERG STATES
SPECTRA
SPECTROSCOPY
SUPERSONIC FLOW
ULTRAVIOLET SPECTRA
VAN DER WAALS FORCES
VIBRATIONAL STATES
WATER