Theoretical analysis of very low energy collision induced vibrational relaxation in the system He--I/sub 2/ (/sup 3/Pi/sub 0//sup +//sub u/)

Journal Article · Fri Apr 15 04:00:00 EST 1983 · J. Chem. Phys.; (United States)

OSTI ID:5986631

Cerjan, C; Rice, S A

Vibrational deexcitation in the low energy collisions of He with I/sub 2/ (/sup 3/Pi/sub 0//sup +//sub u/) is examined within the close-coupled scattering formulation using a sum of pairwise Morse interactions to describe the potential surface. Cross sections for zero total angular momentum are given as a function of energy for various rotational and vibrational transitions with the I/sub 2/ molecule prepared in the n = 25 vibrational state. Similar results for total angular momentum of 2, 1, and 0 are also reported for the n = 1 initial state of I/sub 2/. These calculations are in general agreement with the known experimental results and support the arguments advanced previously to explain the unexpectedly large observed relaxation cross section.

• Research Organization: Department of Chemistry and The James Franck Institute, The University of Chicago, Chicago, Illinois 60637
• OSTI ID: 5986631
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 78:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
DE-EXCITATION
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUIDS
GASES
HALOGENS
HELIUM
IODINE
MOLECULE COLLISIONS
NONMETALS
RARE GASES
RELAXATION
ROTATIONAL STATES
VIBRATIONAL STATES