Vibrational relaxation of highly excited diatomics. IV. HF(v = 1--7) + CO/sub 2/, N/sub 2/O, and HF

Journal Article · Sat Oct 15 04:00:00 EDT 1983 · J. Chem. Phys.; (United States)

OSTI ID:5597693

Dzelzkalns, L S; Kaufman, F

Vibrational relaxation rate constants are measured for HF(v = 1--4) with Q = CO/sub 2/, N/sub 2/O, and HF by the fast flow infrared chemiluminescence technique using four HF(v) generating reactions whose initial vibrational distributions are found be be unrelaxed. The data are combined with earlier results for v = 5, 6, and 7 to provide information on v dependence and quenching mechanism. The rate constants, k/sup Q//sub v/,v-1 range from 1.2 x 10/sup -12/ to 4.5 x 10/sup -10/ cm/sup 3/ s/sup -1/ and increase with power law exponents n of 2.7 to 3.0 in kproportionalv/sup n/ for all three quenchers. The relaxation is principally V--V for CO/sub 2/ and N/sub 2/O, but mainly V-R,T for HF, at least for the higher v levels. The relaxation rate constants are compared with theoretical estimates and form a valuable data base for future theoretical work.

• Research Organization: Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
• OSTI ID: 5597693
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 79:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
OXIDES
OXYGEN COMPOUNDS
RELAXATION
VIBRATIONAL STATES