Theoretical study of electron capture in ion-ion and ion-atom collisions. Progress report, September 1, 1980-April 30, 1981
The eikonal approximation has been recently shown to be of significant utility in the study of electron capture cross sections for energetic ion-atom collisions. The method generally gives much better agreement with available experimental data than does the simple OBK approximation without substantially increasing the difficulty of computation. In the present work, the total cross section is computed for electron capture into an arbitrary nl subshell of H/sup +/, C/sup +6/, O/sup +8/, and Fe/sup +24/ ions from ground state hydrogen atoms, at energies of 40 to 200 keV/nuclear (30 to 100 keV in the H/sup +/ case). These species were selected because of their importance in fusion studies. Interesting variations with l were obtained. Cross sections for capture into an arbitrary final n-shell, or into all final bound states were also obtained. An analytical closed form expression is derived for electron capture from an arbitrary initial nlm state to an arbitrary final n'l'm' state of a hydrogenic target. Numerical results are presented for all n' = 2,3 final states in hydrogen, which may be subjected to experimental test in the near future. Extension of the eikonal method to multielectron targets was studied. There are ambiguities in the method requiring further analysis. Agreement with experimental data is nevertheless satisfactory, but the high energy results are suspect.
- Research Organization:
- Arkansas Univ., Fayetteville (USA). Dept. of Physics
- DOE Contract Number:
- AS05-80ER10749
- OSTI ID:
- 6499194
- Report Number(s):
- DOE/ER/10749-1; TRN: 81-010840
- Country of Publication:
- United States
- Language:
- English
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Eikonal calculation of electron-capture cross sections from an arbitrary nlm shell of a hydrogenic target into an arbitrary n'l'm' shell of a fast bare projectile
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Related Subjects
CARBON IONS
ION-ATOM COLLISIONS
ION-ION COLLISIONS
HYDROGEN
HYDROGEN IONS 1 PLUS
ELECTRON CAPTURE
IRON IONS
OXYGEN IONS
CROSS SECTIONS
EIKONAL APPROXIMATION
EXPERIMENTAL DATA
KEV RANGE 10-100
KEV RANGE 100-1000
ATOM COLLISIONS
CAPTURE
CATIONS
CHARGED PARTICLES
COLLISIONS
DATA
ELEMENTS
ENERGY RANGE
HYDROGEN IONS
INFORMATION
ION COLLISIONS
IONS
KEV RANGE
NONMETALS
NUMERICAL DATA
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena