Twoparticle versus threeparticle interactions in single ionization of helium by ion impact
 Citation data:

Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN: 09534075, Vol: 37, Issue: 20, Page: 40554067
 Publication Year:
 2004
 Repository URL:
 http://scholarsmine.mst.edu/phys_facwork/38
 DOI:
 10.1088/09534075/37/20/002
 Author(s):
 Publisher(s):
 Tags:
 Physics and Astronomy; Approximation theory; Boundary conditions; Continuum mechanics; Couplings; Data reduction; Hamiltonians; Ionization; Perturbation techniques; Collision fragments; Cross sections; Kinematic conditions; Particle interactions; Helium; Approximation theory; Boundary conditions; Continuum mechanics; Couplings; Data reduction; Hamiltonians; Ionization; Perturbation techniques; Collision fragments; Cross sections; Kinematic conditions; Particle interactions; Helium; Physics
article description
We have performed kinematically complete experiments on single ionization of He by 100 MeV amu C and 3.6 MeV amu Au impact. By analysing doubly differential cross sections (DDCS) as a function of the momenta of all twoparticle subsystems we studied the importance of twoparticle interactions. Furthermore, presenting the squared momenta of all three collision fragments simultaneously in a Dalitz plot, we evaluated the role of threeparticle interactions. Finally, both for the DDCS and the Dalitz plots the corresponding correlation function was analysed. While the absolute cross sections confirm that ionization predominantly leads to a momentum exchange between the electron and the recoilion, the correlation function reveals strong correlations between the particles of any twoparticle subsystem. Threeparticle correlations, which are not accounted for by perturbative calculations, are quite significant as well, at least for certain kinematic conditions.