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

Journal Article · Fri May 01 00:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.6371· OSTI ID:7043657

Visticot, J; de Pujo, P; Sublemontier, O; Bell, A J; Berlande, J; Cuvellier, J; Gustavsson, T; Lallement, A; Mestdagh, J M; Meynadier, P; Suits, A G ^[1]

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1. 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), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:9; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ARGON
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BARIUM
COLLISIONS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
FLUIDS
GASES
INELASTIC SCATTERING
LASER RADIATION
METALS
MILLI EV RANGE
NONMETALS
P STATES
POLARIZATION
RADIATIONS
RARE GASES
SCATTERING