Impact-parameter method for electronic excitation of molecules by electron impact

Journal Article · Fri May 01 00:00:00 EDT 1981 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.23.2232· OSTI ID:6534723

Hazi, A U

The semiclassical impact-parameter method is extended to study the electronic excitation of molecules by electron impact. The formalism describes the molecular electrons quantum mechanically but treats the collision classically using straight-line trajectories. The expression for the integrated cross section satisfies reciprocity. The method is applicable to spin-allowed transitions at intermediate and high impact energies where electron exchange is negligible. Theoretical excitation cross sections are presented for the X /sup 1/S/sup +//sub g/..-->..B /sup 1/S/sup +//sub u/ transition in H/sub 2/, X /sup 1/S/sup +//sub g/..-->..1 /sup 1/S/sup +//sub u/, 3 /sup 1/R/sub u/ in F/sub 2/, and X /sup 1/S/sup +//sub g/..-->..b', c' /sup 1/S/sup +//sub u/ in N/sub 2/. Below 50-eV impact energies, the method gives more accurate integrated cross sections than the Born approximation.

• Research Organization: Theoretical Atomic and Molecular Physics Group, Lawrence Livermore National Laboratory, University of California, Livermore, California 94550
• OSTI ID: 6534723
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 23:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 01-10
EV RANGE 10-100
EXCITATION
FLUORINE
HALOGENS
HYDROGEN
IMPACT PARAMETER
MOLECULE COLLISIONS
NITROGEN
NONMETALS