Determination of optical properties by third-harmonic generation in noble gases in unfocused laser beams

Technical Report · Fri Mar 01 04:00:00 EST 1985

OSTI ID:5402736

Ferrell, W R

A new laser technique involving phase-matched third-harmonic generation in unfocused laser beams has been used to determine vacuum ultraviolet (VUV) oscillator strengths in xenon, VUV indices of refraction for the buffer gas (krypton or argon), and the VUV absorption coefficients were determined through total ionization measurements in the frequency regions of phase matching resulting from the interaction of unfocused linearly polarized light with mixtures of xenon and positively dispersive buffer gases. Since the multiphoton ionization mechanism is sharply dominated by the dimer absorption of third-harmonic photons, the ionization signal provides an excellent probe for determination of these optical parameters. Absolute ionization measurements were made through use of a proportional counter which was calibrated by the ionization resulting from an internal /sup 55/Fe source. 38 refs., 33 figs., 3 tabs.

• Research Organization: Oak Ridge Associated Universities, Inc., TN (USA)
• DOE Contract Number: AC05-76OR00033
• OSTI ID: 5402736
• Report Number(s): DOE/OR/00033-T105; ON: DE85015016
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTROSCOPY
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
EXTREME ULTRAVIOLET RADIATION
FLUIDS
GASES
INFORMATION
IONIZATION
LASER SPECTROSCOPY
MEASURING METHODS
NONMETALS
NUMERICAL DATA
OSCILLATOR STRENGTHS
PARTIAL PRESSURE
RADIATIONS
RARE GASES
SPECTROSCOPY
ULTRAVIOLET RADIATION
XENON