Excitation of hydrogenlike ions from ground state to arbitrary p state by electron impact

Journal Article · Sun May 01 04:00:00 EDT 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.27.2447· OSTI ID:6078752

Deb, N C; Sinha, C; Sil, N C

We have formulated a generalized method for the evaluation of the cross sections for 1s-np excitation of hydrogenlike ions by electron impact both in Coulomb-Born and Coulomb-Born-Oppenheimer (CBO) approximations. In this formulation we have replaced the associated Laguerre polynomial for the final-state wave function by an integral representation. The main advantage of our method is that the higher-order parametric differentiations usually adopted in order to obtain the amplitudes for the higher values of the principal quantum number n are avoided by one-dimensional integration. To our knowledge, this is the first attempt to calculate the electron-ion excitation cross section in the CBO approximation for an arbitrary p state without any recourse to partial-wave analysis. We have also calculated asymptotic scaled cross sections for the limit n..-->..infinity at different energies. The direct-excitation results are in good agreement with the existing theoretical findings of Tully for different n values in the intermediate- and high-energy regions.

• Research Organization: Department of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700032, India
• OSTI ID: 6078752
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 27:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BORN APPROXIMATION
BORN-OPPENHEIMER APPROXIMATION
CATIONS
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY-LEVEL TRANSITIONS
EXCITATION
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
ION COLLISIONS
IONS
ISOELECTRONIC ATOMS