| Numéro |
J. Phys. Colloques
Volume 48, Numéro C2, Juin 1987
International Workshop on Semiclassical and Phase Space Approaches to the Dynamics of the Nucleus
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|---|---|---|
| Page(s) | C2-259 - C2-264 | |
| DOI | https://doi.org/10.1051/jphyscol:1987239 | |
J. Phys. Colloques 48 (1987) C2-259-C2-264
DOI: 10.1051/jphyscol:1987239
THE QUANTAL PERMEATION CURRENT AND THE DISCREPANT INITIAL STAGE N-AND Z-DRIFTS IN NUCLEAR HEAVY ION COLLISIONS
J.J. GRIFFIN1, M. DWORZECKA2 et A. LUKASIAK31 Department of Physics and Astronomy, University of Maryland, College Park, MD 20742, U.S.A.
2 Physics Department, George Mason University, Fairfax, VA 22030, U.S.A.
3 BRC Associates Inc., Bethesda, MD 20814, U.S.A.
Abstract
A new quantal permeation current flowing between interacting heavy ions is identified and validated by exact numerical solutions of a model Schrödinger system. This current is driven by the difference between the depths of the potential wells on the two sides of the dinuclear window. It is not included in the conventional descriptions of heavy ion processes, which assume a current dependent only upon the difference between the nucleonic chemical potential energies. Accumulating data on the N- and Z-drifts observed in deep inelastic collisions also contradict the conventional description. By careful exact calculation with the one-dimensional Schrödinger model, the permeation current is here quantified and then extended to three dimensions. The resulting corrections are qualitatively such as to ameliorate the discrepancies between the observations and the conventional description.