Electron-impact excitation of optically forbidden and resonant transitions in Mg/sup +/ at low and medium energies

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.37.4097· OSTI ID:5161324

Chidichimo, M C

A Coulomb-Born distorted-wave approximation, in which allowance is made for the distortion of partial waves by direct multipole potentials, has been used to evaluate the excitation cross section of Mg/sup +/ by electron impact. The calculations have been carried out using a unitarized four-state approximation (3s-3p-4s-3d) for the incident energy range 4--135 eV. The problem has been formulated in the LS coupling scheme, with the target ion being represented by a core plus atomic electron (frozen-core approximation) and exchange between the atomic and the incident electron being neglected. For the optically forbidden 3s-3d and 4s-3d transitions a simple analytic formula has been derived to estimate the contribution to the total collision strength from large values of angular momentum.

• Research Organization: Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada N2Lchemically bond3G1
• OSTI ID: 5161324
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 37:11; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CHARGED PARTICLES
COLLISIONS
COUPLING
CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EXCITATION
FORBIDDEN TRANSITIONS
INTERMEDIATE COUPLING
ION COLLISIONS
IONS
L-S COUPLING
MAGNESIUM IONS
RESONANCE