A study of the absolute infrared intensity of. nu. /sub 3/, absorption from vibrationally excited molecules, and the vapor pressure of UF/sub 6/
Results are presented from laser diode studies of ..nu../sub 3/ transition of UF/sub 6/ in the 16 ..mu..m region using a very long optical path absorption cell. The ..nu../sub 3/ Q-branch and several individual rotational transitions have been recorded in the temperature range between 165 and 295 K. From the ..nu../sub 3/ band contour analysis and the line intensity measurements, the vibrational band strength of the ..nu../sub 3/ transition, S/sup 0//sub V/=710 +- 120 km mole/sup -1/, was obtained. From absorption measurements of a UF/sub 6/ sample in the cooled cell at pressures from 10/sup -3/ to 10/sup -5/ Torr, the vapor pressure curve of UF/sub 6/ was extended to the temperature range down to 165 K. A new technique is described allowing us to obtain diode laser ''survey'' spectra over a range of 25 cm/sup -1/ by ''mode scans.'' This technique allows us to measure the changes in the band shape of ..nu../sub 3/ as a function of temperature, and thus learn something about ''hot band'' absorption from vibrationally excited molecules.
- Research Organization:
- University of California, Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545
- OSTI ID:
- 6733717
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 74:1; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ACTINIDE COMPOUNDS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INFRARED SPECTRA
LOW TEMPERATURE
PHYSICAL PROPERTIES
ROTATIONAL STATES
SPECTRA
THERMODYNAMIC PROPERTIES
URANIUM COMPOUNDS
URANIUM FLUORIDES
URANIUM HEXAFLUORIDE
VAPOR PRESSURE
VIBRATIONAL STATES