Velocity dependence of rates for rotationally inelastic collisions in Na(/sub 2/--Xe using velocity selection by Doppler shift

Journal Article · Thu Jan 01 04:00:00 EST 1981 · J. Chem. Phys.; (United States)

OSTI ID:7093789

Smith, N; Brunner, T A; Pritchard, D E

We have measured the velocity dependence of rotational energy transfer (RET) rate constants for Na(/sub 2/(A /sup 1/..sigma../sub u//sup +/)--Xe collisions over an order of magnitude range in relative kinetic energy. Measurements were made for initial rotational levels j/sub i/=16, 38, and 66 for four different values of ..delta..=j/sub f/-j/sub i/. The present data are analyzed in terms of the energy corrected sudden (ECS) scaling approximation and determine the velocity dependence of both the ''adiabatic correction'' factor of the ECS theory, and the parameters a and ..gamma.. which appear in the power law expression for the basis rates k/sub l/..-->..0(v/sub r/) =a(v/sub r/)(l(l+1))-..gamma..(v/sub r/), an expression shown to be valid at all relative velocities studied. These measurements were made in a gas cell using the velocity selection by Doppler shift (VSDS) technique. Full details of analysis and deconvolution procedures used to isolate the relative velocity dependence are given.

• Research Organization: Research Laboratory of Electronics and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 7093789
• 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

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
DIMERS
DOPPLER EFFECT
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUIDS
GASES
METALS
MOLECULE COLLISIONS
NONMETALS
RARE GASES
ROTATIONAL STATES
SODIUM
SPECTRAL SHIFT
SUDDEN APPROXIMATION
VELOCITY
XENON