Dynamical constraints on the transfer of angular momentum in rotationally inelastic collisions of I/sub 2/(B /sup 3/Pi) with He and Xe

Journal Article · Sat May 15 04:00:00 EDT 1982 · J. Chem. Phys.; (United States)

OSTI ID:5424492

Dexheimer, S L; Durand, M; Brunner, T A; Pritchard, D E

We have measured thermally averaged level-to-level rate constants for rotationally inelastic collisions of I/sub 2/(B /sup 3/Pi) with Xe and He using the method of laser induced fluorescence. We present the values of 149 rate constants with average errors less than 10% for initial rotational levels ranging from 41 to 113 in the v' = 13 vibrational level. For I*/sub 2/--He, we report the first experimental evidence for a limitation of maximum angular momentum transfer on level-to-level rate constants and conclude that dynamical, rather than energetic constraints govern the collisional process. We find that the I*/sub 2/--Xe rate constants follow a power law in both energy and angular momentum transfer, a behavior observed in most previous experimental work on rotationally inelastic collisions.

• Research Organization: Research Laboratory of Electronics and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 5424492
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 76:10; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR MOMENTUM TRANSFER
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
COLLISIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
FLUORESCENCE
GASES
HALOGENS
HELIUM
IODINE
LUMINESCENCE
MOLECULE COLLISIONS
MOMENTUM TRANSFER
NONMETALS
RARE GASES
ROTATIONAL STATES
XENON