Electron impact collision strengths for excitation of highly charged ions

Technical Report · Mon Aug 20 00:00:00 EDT 1990

DOI:https://doi.org/10.2172/6506503· OSTI ID:6506503

Sampson, D H ^[1]

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1. Pennsylvania State Univ., University Park, PA (USA). Dept. of Astronomy and Astrophysics

The principle task given us by the Lawrence Livermore National Laboratory (LLNL) to perform under Subcontract 6181405 was to develop a method and corresponding computer programs to make very rapid, yet accurate, fully relativistic and quasirelativistic calculations of cross sections or collision strengths for electron impact excitation of highly charged ions with any value for the nuclear charge number Z. Also while this major code development was being done we were asked to calculate cross sections of interest using our previous rapid, more approximate codes, which used hydrogenic basis functions and screening constants with both the electron-electron Coulomb interaction and relativistic interactions included by perturbation theory. We were also asked to determine the branching ratio for ionization to various final states in complex cases, where two or more states corresponding to the final configuration of the ion were possible.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Pennsylvania State Univ., University Park, PA (USA). Dept. of Astronomy and Astrophysics
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6506503
• Report Number(s): UCRL-CR-105110; ON: DE91002666
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ELECTRON COLLISIONS
CROSS SECTIONS
MULTICHARGED IONS
ELECTRON-ION COLLISIONS
BRANCHING RATIO
ELECTRON-ELECTRON COLLISIONS
EXCITATION
IONIZATION
PERTURBATION THEORY
PROGRESS REPORT
CHARGED PARTICLES
COLLISIONS
DOCUMENT TYPES
ENERGY-LEVEL TRANSITIONS
ION COLLISIONS
IONS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena