Mechanism of the (e,2e) reaction with atoms

Journal Article · Mon May 01 04:00:00 EDT 1978 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.17.1634· OSTI ID:6778973

Camilloni, R; Guidoni, A G; McCarthy, I E; Stefani, G

The (e,2e) reaction is studied under kinematic conditions designed to test different reaction theories. The problem is reduced to a calculation involving distorted waves for the electron-ion interactions and a two-body operator for the electron-electron interaction. The amplitude factorizes into an ee factor and a distorted-wave factor if the eikonal approximation is made for the distorted waves. The factorization is tested by choosing kinematics so as to keep the distorted-wave factor constant while varying the ee factor. The value of the average eikonal potential is established in coplanar symmetric kinematics. The target is helium. At incident energies of 400 and 800 eV, the approximation is good for recoil momenta less than about 1 a.u., provided the effective two-body operator is the t matrix. The v matrix is ruled out. There are strong indications that the impulse approximation itself breaks down for small relative momenta between the outgoing electrons.

• Research Organization: Comitato Nazionale per l'Energia Nucleare, Laboratorio Spettroscopia Molecolare, Centro di Frascati, C.P. 65, 00044 Frascati, Italy
• OSTI ID: 6778973
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 17:5; 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
COLLISIONS
CRYOGENIC FLUIDS
EIKONAL APPROXIMATION
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
FLUIDS
HELIUM
IONIZATION
NONMETALS
RARE GASES