Lifetimes and collisions in KH, A /sup 1/. sigma. /sup +/, v' = 5--22

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

OSTI ID:6864505

Giroud, M; Nedelec, O

KH obtained in a high frequency discharge in K+H/sub 2/ is selectively excited by a pulsed dye laser to A /sup 1/..sigma../sup +/, v' = 5--22, J' = 8 or 9. The radiative lifetimes are measured. They decrease slowly from v' = 5 (64 ns) to v' = 19 (53 ns) and rapidly at v' = 22 (34 ns). Rotational transfer cross sections by collisions with H/sub 2/ increase from v' = 5 (41 A/sup 2/) to v' = 19 (92 A/sup 2/) as do the electric dipole moments in the levels. The collision with the electrons of the discharge provide rotational transfers where the ..delta..J' = +- 1 transitions are the greatest and vibrational transfers ..delta..v' = +- 1, +- 2, where the ..delta..J' = 0 transitions are small. These results are to be expected in polar molecules where the interaction of the electron with the permanent dipole moment of the molecule is predominant.

• Research Organization: Laboratoire de Spectrometrie Physique, Universite Scientifique et Medicale de Grenoble, B.P. 53X, 38041 Grenoble Cedex, France
• OSTI ID: 6864505
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 77:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METAL COMPOUNDS
COLLISIONS
ELECTRIC DISCHARGES
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
LIFETIME
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NONMETALS
POTASSIUM COMPOUNDS
POTASSIUM HYDRIDES
ROTATIONAL STATES