Angle-differential cross sections and spin-asymmetry parameters for spin-polarized electron-impact excitation of spin-polarized cesium atoms

Journal Article · Thu Jul 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.012707· OSTI ID:20643907

Baum, G; Foerster, S; Pavlovic, N; Roth, B; Bartschat, K; Bray, I ^[1]

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1. Fakultaet fuer Physik, Universitaet Bielefeld, D-33615 Bielefeld (Germany)

Relative angle-differential cross sections and spin-asymmetry parameters are presented for spin-polarized electron-impact excitation of spin-polarized cesium atoms for incident projectile energies ranging from 5 eV to 25 eV. The experimental data, obtained in the angular range of 40 deg. to 140 deg., are compared with predictions from a nonrelativistic convergent close-coupling treatment for the differential cross section and the (spin) exchange asymmetry and from a semirelativistic R matrix with pseudostates approach. The latter also yields nonzero values for two other spin asymmetries that require the presence of explicitly relativistic effects such as the spin-orbit interaction. The overall agreement between the experimental data and the theoretical predictions is satisfactory.

• OSTI ID: 20643907
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ASYMMETRY
ATOMS
CESIUM
DIFFERENTIAL CROSS SECTIONS
ELECTRON-ATOM COLLISIONS
ELECTRONS
EV RANGE
EXCITATION
L-S COUPLING
R MATRIX
RELATIVISTIC RANGE
SPIN
SPIN EXCHANGE