HF multiquantum V. -->. R relaxation rates with N/sub 2/ and CO

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · J. Chem. Phys.; (United States)

OSTI ID:7048992

Yang, X; Pimentel, G C

Through photolysis of NF/sub 3//HI/M = 1.5/0.5/38 Torr mixtures (M = N/sub 2/,CO,Ar) in a grating cavity, HF rotational laser emission is produced for (v = 0, J = 21..-->..20), (1,23..-->..22), (2,24..-->..23), and (3,18..-->..17). Known attenuators are placed in the laser cavity and used to estimate the absolute population inversions responsible for the laser gains. The results confirm the role of selective V..-->..R resonant pumping of these high J rotational lasers. Further, they provide rough estimates for the ..delta..v = 2, ..delta.. J = 10, and ..delta..v = 3, ..delta.. J = 20 near-resonant V..-->..R rate constants for HF relaxation by N/sub 2/ from v = 4, J = 14, and v = 5, J = 3, 4, and 5 to v = 2, J = 24. These estimates fall in the range 10/sup -13/ to 10/sup -14/ cm/sup 3//molecule s, indicating that for N/sub 2/ collision partners, HF multiquantum processes with ..delta..v = 3 may contribute a few percent of the total v = 5 vibrational relaxation rate. They also suggest that, for both N/sub 2/ and CO, V..-->..R near-resonant channels (including ..delta..v = 1) provide the dominant relaxation process.

• Research Organization: Department of Chemistry, University of California, Berkeley, California, 94720
• OSTI ID: 7048992
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 81:3; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
ELEMENTS
EMISSION SPECTRA
ENERGY LEVELS
EXCITED STATES
GAIN
GAS LASERS
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
LASERS
NITROGEN
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POPULATION INVERSION
RELAXATION
ROTATIONAL STATES
SPECTRA
VIBRATIONAL STATES