Half-shell. cap alpha. +. cap alpha. scattering

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.27.2548· OSTI ID:6044361

Kok, L P; Holwerda, J E; de Maag, J W

For a given ..cap alpha cap alpha.. potential we show how to calculate in a convenient way the half-off-the-energy-shell cross section sigma/sub half/ for ..cap alpha cap alpha.. scattering. We compute sigma/sub half/ numerically for energies up to 125 MeV (lab), and make a comparison with the free-scattering cross section. Coulomb effects are included rigorously. In particular, we recall that sigma/sub half/ is a discontinuous function of the off-shell-momentum variable at the on-shell value. We confirm that off-shell effects are sizeable, and discuss the relevance for the plane-wave impulse approximation and distorted-wave impulse approximation descriptions of (..cap alpha..,2..cap alpha..) reactions.

• Research Organization: Institute for Theoretical Physics, Groningen, The Netherlands and Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6044361
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 27:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651215* -- Nuclear Properties & Reactions
A=1-5
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
CHARGED-PARTICLE REACTIONS
COULOMB FIELD
CROSS SECTIONS
DIRECT REACTIONS
DISTORTED WAVE THEORY
ELECTRIC FIELDS
HELIUM 4 TARGET
IMPULSE APPROXIMATION
KNOCK-OUT REACTIONS
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEAR REACTIONS
SHELL MODELS
TARGETS