Energy-resolved intramultiplet mixing in the electron-volt range for Ne[sup **][l brace](2[ital p])[sup 5](3[ital p])[r brace]+He

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.4660· OSTI ID:7238656

Boom, W; Op de Beek, S S; van Galen, R A.M.L.; Huijsmans, F J.J.; Beijerinck, H C.W.; Verhaar, B J ^[1]

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1. Physics Department, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven (Netherlands)

We present time-of-flight measurements on fine-structure-changing Ne[sup **][l brace](2[ital p])[sup 5](3[ital p])[r brace]+He collisions in the energy range 200[le][ital E][le]1200 meV. Absolute values of polarized-atom cross sections are given for six collision energies in this range for various transitions from the [l brace][alpha][sub 5][r brace] and [l brace][alpha][sub 7][r brace] initial fine-structure states with electronic angular momentum [ital J][sub [ital k]]=1, with [l brace][alpha][sub [ital l]][r brace]=[l brace](2[ital p])[sup 5](3[ital p])[sub [ital l]][r brace] and index [ital l] corresponding to the usual Paschen numbering within the multiplet with [ital l]=1 through 10 with decreasing electronic energy. A wide range of energy dependencies of both cross-section magnitude and polarization effect is observed. Experimental results are compared with fully-quantum-mechanical coupled-channels calculations. Definite evidence is found for a serious short coming in both the input model potentials [D. Hennecart, Ph.D. thesis, Universite de Caen, Caen, France, 1982 (unpublished); D. Hennecart and F. Masnou-Seeuws, J. Phys. B 18, 657 (1985)] and the semiclassical model as used by Manders [ital et] [ital al]. [Phys. Rev. A 39, 4467 (1989)] for explaining the observed features in the thermal energy range.

• OSTI ID: 7238656
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 49:6; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR MOMENTUM
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
COLLISIONS
CONFIGURATION MIXING
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
ENERGY RESOLUTION
EV RANGE
EXCITED STATES
FINE STRUCTURE
FLUIDS
GASES
HELIUM
INTERACTIONS
MILLI EV RANGE
MULTIPLETS
NEON
NONMETALS
RARE GASES
RESOLUTION
TIME-OF-FLIGHT METHOD