Polarization effects in the differential cross section of the Ba( sup 1 P sub 1 - sup 3 P sub 2 ) inelastic transition induced by argon
- Service des Photons, Atomes et Molecules, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette CEDEX (France)
The Ba(6{ital s}6{ital p} {sup 1}{ital P}{sub 1}{r arrow}{sup 3}{ital P}{sub 2}) inelastic transition induced by argon has been investigated in a crossed beam as a function of the collision energy between 0.14 and 0.40 eV. The differential cross sections have been obtained by the Doppler technique probing the Ba(6{ital s}6{ital p} {sup 3}{ital P}{sub 2}) with a single-mode cw laser. Oscillations are observed in the differential cross sections that are assigned to Stueckelberg interferences resulting from a crossing between the {sup 1}{Pi}{sub 1} and {sup 3}{Sigma}{sub 1} Ba-Ar potential-energy curves. A very large polarization effect is observed by comparing the differential cross sections corresponding to a {ital p}{sigma} or a {ital p}{pi} preparation of the Ba({sup 1}{ital P}{sub 1}) orbital with respect to the relative Ba-Ar velocity.
- OSTI ID:
- 7043657
- Journal Information:
- Physical Review A. General Physics; (United States), Vol. 45:9; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ARGON
ATOM-ATOM COLLISIONS
BARIUM
ENERGY-LEVEL TRANSITIONS
CROSS SECTIONS
INELASTIC SCATTERING
LASER RADIATION
MILLI EV RANGE
P STATES
POLARIZATION
ALKALINE EARTH METALS
ATOM COLLISIONS
COLLISIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
FLUIDS
GASES
METALS
NONMETALS
RADIATIONS
RARE GASES
SCATTERING
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)