Consequences on the electron-capture to continuum peak produced by a screening of the postcollisional electron-projectile interaction

Journal Article · Tue Nov 01 04:00:00 EST 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.28.2792· OSTI ID:5267806

Garibotti, C R; Barrachina, R O

The electron capture to continuum (ECC) from atoms by a fast bare ion is investigated assuming that the electron-projectile interaction in the final state is a screened Coulomb potential. The cut-off Coulomb and Hulthen potentials are used to show that the ECC cross section is either finite or diverges as 1/v/sup 2/ for small final relative electron-projectile velocities (v). Theoretically this represents a considerable deviation from the usual premise of the 1/v behavior given by the Coulomb factor. However, for gaseous targets we get the usual ECC peak shape as an average over the screening range of the interaction. We discuss some experimental conditions where anomalies due to screening are expected to be observable.

• Research Organization: Instituto Balseiro and Consejo Nacional de Investigaciones Cientificas y Tecnicas, 8400 San Carlos de Bariloche, Argentina
• OSTI ID: 5267806
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 28:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CAPTURE
COLLISIONS
COULOMB FIELD
CROSS SECTIONS
ELECTRIC FIELDS
ELECTRON CAPTURE
ENERGY DEPENDENCE
HULTHEN POTENTIAL
ION COLLISIONS
ION-ATOM COLLISIONS
NUCLEAR POTENTIAL
POTENTIALS