Intermediate coupling collision strengths for. delta. n = 0 transitions produced by electron impact on highly charged He- and Be-like ions
Coulomb--Born-exchange data for intermediate coupling scaled collision strengths Z/sup 2/..cap omega.. for all fine-structure transitions of type 2l/sub a/2l/sub b//sup 2S//sub a/+1L/sub a//sub J/a -2l'/sub a/2l'/sub b//sup 2S/'/sub a/+1L'/sub a//sub J/'/sub a/ in Be-like ions with 12 < or =Z< or =74 and the kind 1s2l/sub b//sup 2S//sub a/+1L/sub a//sub J/a -1s2l'/sub b//sup 2S/'/sub a/+1L'/sub a//sub J/'/sub a/ 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 distribution 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 the electric-dipole radiative line strengths. The basic collision strength data cover impact electron energies less-than-or-equal-tilde3.25 Z/sup 2/ Ry or 44.3 Z/sup 2/ eV.
- Research Organization:
- Department of Astronomy, The Pennsylvania State University, University Park, Pennsylvania 16802
- OSTI ID:
- 5728474
- Journal Information:
- At. Data Nucl. Data Tables; (United States), Journal Name: At. Data Nucl. Data Tables; (United States) Vol. 25:3; ISSN ADNDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
COUPLING
DISTRIBUTION FUNCTIONS
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY DEPENDENCE
ENERGY-LEVEL TRANSITIONS
FINE STRUCTURE
FUNCTIONS
INTERMEDIATE COUPLING
ION COLLISIONS
TABLES