Differential cross sections for the electron-impact excitation of He-like ions: 2 /sup 3/S and 2 /sup 3/P

Journal Article · Fri Jul 15 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.664· OSTI ID:6967239

Itikawa, Y; Sakimoto, K

Differential cross sections for the electron-impact excitation of ions are calculated and compared along the He-like isoelectronic sequence. With the use of a distorted-wave method, cross sections are obtained for the transitions 1 /sup 1/S..-->..2 /sup 3/S,2 /sup 3/P in Li/sup +/, O/sup 6+/, and Si/sup 12+/. A comparison is also made to the cases of neutral He and the limit Z..-->..infinity (Z being the nuclear charge). When scaled by multiplication by Z/sup 4/ and compared at the same energy in threshold units, the resulting cross sections are quite similar both in magnitude and in angular distribution all along the isoelectronic sequence. The Coulomb-wave approximation is also used to calculate the differential cross section to test its validity.

• Research Organization: Institute of Space and Astronautical Science, Yoshinodai, Sagamihara-shi 229, Japan
• OSTI ID: 6967239
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY-LEVEL TRANSITIONS
EXCITATION
ION COLLISIONS
IONS
ISOELECTRONIC ATOMS
LITHIUM IONS
OXYGEN IONS
SILICON IONS