Electron-impact-ionization cross sections for highly ionized heliumlike atoms

Journal Article · Wed Oct 01 00:00:00 EDT 1980 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.22.1425· OSTI ID:5096063

Younger, S M

Cross sections for electron-impact ionization from the ground states of four ions in the helium isoelectronic sequence have been calculated in the distorted-wave Born-exchange approximation. The results are in good agreement with available experimental data. Exchange in the scattering matrix element was found to be important in the determination of accurate cross sections. An isoelectronic plot of the scaled cross section permits ready interpolation of the nonrelativistic ionization cross section for any ion in the helium sequence in the incident electron energy range 1--5 times threshold.

• Research Organization: National Bureau of Standards, Washington, D.C. 20234
• OSTI ID: 5096063
• Journal Information: Phys. Rev., A; (United States), Vol. 22:4
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BORON IONS
ELECTRON-ION COLLISIONS
IONIZATION
LITHIUM IONS
NITROGEN IONS
SODIUM IONS
CROSS SECTIONS
DWBA
GROUND STATES
ISOELECTRONIC ATOMS
S MATRIX
ATOMS
BORN APPROXIMATION
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ENERGY LEVELS
ION COLLISIONS
IONS
MATRICES
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena