Electron collisions with positive ions. Progress report, April 1, 1983-March 31, 1984

Technical Report · Thu Sep 01 04:00:00 EDT 1983

OSTI ID:5548270

Henry, R J

Inelastic electron impact collision strengths were calculated for Mg/sup +/ from the 3s ground state to excited states, 3p, 4s, 3d and 4p in a five-state close coupling approximation for the electron impact energy range 15 < E < 1000 eV, and for excitation of Al/sup + +/ from the 3s to 3p state in a two-state close coupling approximation for the electron impact energy range 15 < E < 400 eV. Accurate target functions were used in the expansion. In addition, cascade contributions added 20 to 40% to the total excitation cross section for the 3p level of Mg/sup +/, and less than 5% for Al/sup + +/. While our manuscript has been completed, submission will be delayed until a companion paper on the experiments is prepared. Differential cross sections for excitation of Zn/sup +/ from the 4s ground state to the 4p excited state were calculated at energies between 15 and 100 eV in a five-state close coupling approximation in which the 4s, 4p, 3d/sup 9/4s/sup 2/, 5s and 4d states were included. We used the reactance matrices obtained by Msezane and Henry in a program developed by Brandt, Truhlar, and Smith to calculate angular differential cross sections. Agreement in shape between theory and experiment at 75 eV is excellent. Experiments were carried out in a crossed electron-ion-beam geometry for the 4s ..-->.. 4p transition in Zn/sup +/ at 75 eV, and they are the first measurements for differential electron-scattering cross sections for inelastic excitation of an ion.

• Research Organization: Louisiana State Univ., Baton Rouge (USA). Dept. of Physics and Astronomy
• DOE Contract Number: AS05-80ER10609
• OSTI ID: 5548270
• Report Number(s): DOE/ER/10609-15; ON: DE84000835
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular &amp; Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM IONS
BEAMS
CHARGED PARTICLES
COLLIDING BEAMS
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 10-100
EXCITATION
ION COLLISIONS
IONIZATION
IONS
MAGNESIUM IONS
ZINC IONS