Three- and Four-Body Dynamics in Fast Heavy Ion-Atom Ionization
Single ionization of helium by impact of 3.6 MeV u−1 Au53+ ions is investigated by means of quantum-mechanical and classical methods. Calculations of fully differential cross sections are compared with recently published data for ionization of low-energy electrons as a function of the momentum transferred by the projectile to the target system. A description of initial and final states of the He atom in terms of a Hartree-Fock potential provides an improvement over previous hydrogen-like models. The present results show that inclusion of the resolution and uncertainties present in the experiment has a major influence on both the shape and magnitude of the cross sections. The effect of four bodies and electron-electron correlation is also investigated. However, after including the experimental conditions into the calculations, the three- and four-body results present similar behaviour.
R. E. Olson and J. Fiol, "Three- and Four-Body Dynamics in Fast Heavy Ion-Atom Ionization," Journal of Physics B: Atomic, Molecular and Optical Physics, Institute of Physics - IOP Publishing, Oct 2004.
The definitive version is available at http://dx.doi.org/10.1088/0953-4075/37/19/013
United States. Department of Energy
Keywords and Phrases
Atomic and Molecular Collisions; Atomic and Molicular Physics; Electronic Excitation; Electronic Ionization; Excited States; Few-Body Systems; Many-Body Systems; Self-Consistent-Field Methods
Article - Journal
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