Resonance contribution to electron-impact excitation of Ne-like ions

Journal Article · Tue Mar 15 00:00:00 EST 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.37.1983· OSTI ID:5344418

Omar, G; Hahn, Y

Detailed calculation of cross sections and rate coefficients for electron-impact excitation of Ne-like ions is presented in which contributions of the resonance intermediate states, 2p/sup 5/n/sub t/l/sub t/nl with n/sub t/less than or equal to4, are included, leading to the final states 2p/sup 5/3l/sub f/, where l/sub f/ = 0,1,2. The cascade effect greatly complicates the calculation, as compared with the complementary process, the dielectronic recombination. The present study of the Fe/sup 16+/ ion supplements the earlier work by B. W. Smith et al. (Astrophys. J. 298, 898 (1985)), while the Se/sup 24+/ ion was considered in detail for application to soft x-ray lasers. The resonance-excitation effect reduces substantially the existing discrepancy in the case of Se between the simple ionization-balance model and recent plasma experiments.

• Research Organization: Department of Physics, University of Connecticut, Storrs, Connecticut 06268
• OSTI ID: 5344418
• Journal Information: Phys. Rev. A; (United States), Vol. 37:6
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
IRON IONS
ELECTRON-ION COLLISIONS
SELENIUM IONS
CROSS SECTIONS
EXCITATION
MULTILEVEL ANALYSIS
RESONANCE
THRESHOLD ENERGY
X-RAY LASERS
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ENERGY
ENERGY-LEVEL TRANSITIONS
ION COLLISIONS
IONS
LASERS
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena