N /sup 1/S and n /sup 1/P excitations of heliumlike ions by electrons: A precise distorted-wave polarized-orbital approach

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.35.1080· OSTI ID:6838584

Srivastava, R; Katiyar, A K

Total-cross-section results for excitations of n /sup 1/S and n /sup 1/P (n = 2--6) states of several heliumlike ions from the 1 /sup 1/S ground state are reported in this paper for energies near threshold to above 5 times the threshold energy. These results are obtained using a reliable distorted-wave polarized-orbital approach where distortions are included due to static, polarization, and exchange effects appropriately as desired in both the initial and final channels of the distorted waves. Sensitivity of the results with respect to different choices of ion-target wave functions (such as hydrogenic, Hartree-Fock, and configuration-interaction types) in the present model is also examined. The results are compared with other available theoretical estimates.

• Research Organization: Department of Physics, University of Roorkee, Roorkee, India
• OSTI ID: 6838584
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 35:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC IONS
ATOMS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
ION COLLISIONS
IONS
ISOELECTRONIC ATOMS
MULTICHARGED IONS
S STATES
TOTAL CROSS SECTIONS