Compilation of theoretical electron-impact excitation cross sections for Fe atomic ions

Technical Report · Sun Nov 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/5926349· OSTI ID:5926349

Pindzola, M. S.; Crandall, D. H.

This compilation by the ORNL Controlled Fusion Atomic Data Center of excitation cross sections for Fe ions represents the first part of compilation of recommended collision cross sections for impurity ions of fusion interest. Extensions to other species and other processes is ongoing. Specifically compilation of excitation and electron capture data for C and O ions is currently in progress in collaboration with Japanese data centers. Data compilations for the processes of ionization and recombination are also needed. At present the Lotz formula is the best overall predictor for ionization cross sections with 0.85 of the Lotz formula found to be a slight improvement for ions +1 through +3. However, indirect processes such as excitation-autoionization can cause the Lotz formula to be an underestimate of ionization for specific ions, particularly heavy ions with three or more attached electrons. Recombination formulas are in use but are of highly uncertain reliability. Insufficient data and lack of any test of reliability for recombination preclude meaningful data compilation for this process at present.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5926349
• Report Number(s): ORNL/TM-7957; ON: DE82001951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA
DATA COMPILATION
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY-LEVEL TRANSITIONS
EXCITATION
IMPURITIES
INFORMATION
ION COLLISIONS
IONIZATION
IONS
IRON IONS
NUMERICAL DATA
RECOMBINATION
THEORETICAL DATA