Intermediate-coupling collision strengths for transitions between doubly excited levels produced by electron impact on highly charged He-like ions
Coulomb-Born-Exchange data for intermediate-coupling scaled collision strengths Z/sup 2/..cap omega.. for fine-structure transitions of type 2l/sub a/2l/sub b/ /sup 2S/a+1L/sub a/Ja- 2l/sub a/2l'/sub b/ /sup 2S/'/sub a/+1L/sup '//sub a/J'/sub a/ or 2l/sub a/2l/sub b/(j/sub a/j/sub b/-2l/sub a/2l'/sub b/(j/sup '//sub a/j/sup '//sub b/) /sub J//sup '//sub 2/ between the doubly excited levels in He-like ions with 6< or =Z< or =74 are fitted by simple functions of the impact-electron energy epsilon in threshold units. To obtain collision rates these functions can be readily integrated over a Maxwellian energy-distribution function for the electrons. Fits to the data for transitions between energy terms are also included. In addition results are given for the transition energies and electric-dipole radiative line strengths. The basic collision-strength data cover impact-electron energies < or =3.25Z/sup 2/ Ry or 44.2Z/sup 2/ eV.
- Research Organization:
- Department of Astronomy, The Pennsylvania State University, University Park, Pennsylvania 16802
- DOE Contract Number:
- AC02-76ET53056
- OSTI ID:
- 5267779
- Journal Information:
- At. Data Nucl. Data Tables; (United States), Journal Name: At. Data Nucl. Data Tables; (United States) Vol. 28:2; ISSN ADNDA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Data for transitions between doubly excited levels in He-like ions
Excitation and ionization of highly charged ions by electron impact. Progress report, January 1, 1982 to April 30, 1983
Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
COUPLING
CROSS SECTIONS
DATA
DATA COMPILATION
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FINE STRUCTURE
INFORMATION
INTERMEDIATE COUPLING
ION COLLISIONS
NUMERICAL DATA
TABLES