Elastic scattering of electrons and positrons by lithium atoms

A two-potential approach is used to study the elastic scattering of electrons and positrons by lithium atoms in the intermediate-energy region. Within the framework of the two-potential method, the effect of close coupling is considered by including the closely lying 2{ital p} state in the distorted...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 1990-09, Vol.42 (5), p.2696-2702
Main Authors: Mathur, KC, Purohit, SP
Format: Article
Language:English
Subjects:
640304 - Atomic, Molecular & Chemical Physics- Collision Phenomena
ALKALI METALS
ATOM COLLISIONS
ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
ELASTIC SCATTERING
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
LITHIUM
METALS
POSITRON COLLISIONS
POSITRON-ATOM COLLISIONS
SCATTERING
TOTAL CROSS SECTIONS
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Summary:A two-potential approach is used to study the elastic scattering of electrons and positrons by lithium atoms in the intermediate-energy region. Within the framework of the two-potential method, the effect of close coupling is considered by including the closely lying 2{ital p} state in the distorted-wave representation of the total scattering wave function. Differential and integrated cross sections are calculated for the elastic electron and positron scattering. The differential spin asymmetry and ratio {ital R} of the triplet-to-singlet cross section are also calculated to study the effect of exchange for electron scattering. The results thus obtained are compared with available experimental data and other available theoretical calculations.
ISSN:1050-2947
0556-2791
1094-1622
DOI:10.1103/PhysRevA.42.2696