Quenching of electronically excited barium atoms, Ba(5d /sup 3/D/sub J/)

Journal Article · Tue Jan 15 04:00:00 EST 1980 · J. Chem. Phys.; (United States)

OSTI ID:5542476

Whitkop, P G; Wiesenfeld, J R

The lowest optically metastable excited state of barium, Ba(5d /sup 3/D/sub J/), was populated by laser excitation of the 6p /sup 1/P/sup 0//sub 1/reverse arrow6s /sup 1/S/sub 0/ (lambda=553.5 nm) transition followed by the spontaneous emission 6p /sup 1/P/sup 0//sub 1/..-->..5d /sup 3/D/sub J/ (lambdaapprox.1130 nm). No evidence for the normally spin allowed transition 6p /sup 1/P/sup 0//sub 1/ ..-->..5d /sup 1/D/sub 2/ (lambda=1500 nm) was obtained. The deactivation of Ba (5d/sup 3/D/sub J/) by Ba (6s /sup 1/S/sub 0/) is extremely efficient proceeding with a thermal cross section of 1.3 +- 0.1 nm/sup 2/ at approx. =730 K. This is in sensible accord with recent calculations of Ba/sub 2/ potential curves.

• Research Organization: Department of Chemistry, Cornell University, Baker Laboratory, Ithaca, New York 14853
• OSTI ID: 5542476
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 72:2; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BARIUM
COLLISIONS
DE-EXCITATION
ELEMENTS
EMISSION SPECTRA
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
METALS
METASTABLE STATES
SPECTRA