Test of the time-dependent mean-field theory in Kr-induced strongly damped collisions

Axially symmetric time-dependent mean-field calculations using a Skyrme-type effective interaction have been performed for 84Kr + 208Pb at Elab=494 MeV and 84Kr + 209Bi at Elab=600 MeV. Calculated fragment energies, mean masses, and scattering angles for strongly damped collisions are in good agreement with experiment, but mass distribution widths are an order of magnitude too small

Time-dependent Hartree-Fock calculations for 16O + 16O and 40Ca + 40Ca reactions

The time-dependent Hartree-Fock approximation is applied to 16O + 16O and 40Ca + 40Ca reactions. An effective interaction which results in a local Hartree-Fock potential is used. The full time-dependent Hartree-Fock problem is reduced to two dimensions by treating the relative orbital motion of the ions in the rotating frame approximation. The detailed dynamics of the nuclear density matrix during these reactions is discussed. The deflection function, energy loss, fragment charge distribution, and ion-ion potential have been computed for several reactions and compared with available data. The physical content and limitations of our calculations are discussed

Analytic descriptions for transitional nuclei near the critical point

Exact solutions of the Bohr Hamiltonian with a five-dimensional square well potential, in isolation or coupled to a fermion by the five-dimensional spin-orbit interaction, are considered as examples of a new class of dynamical symmetry or Bose-Fermi dynamical symmetry. The solutions provide baselines for experimental studies of even-even [E(5)] and odd-mass [E(5|4)] nuclei near the critical point of the spherical to deformed gamma-unstable phase transition.Comment: LaTeX (elsart), 53 pages; typographical correction to (3.15

Ionization of hydrogen and hydrogenic ions by antiprotons

Presented here is a description of the ionization of hydrogen and hydrogenic ions by antiproton-impact, based on very large scale numerical solutions of the time-dependent Schr\"odinger equation in three spatial dimensions and on analysis of the topology of the electronic eigenenergy surfaces in the plane of complex internuclear distance. Comparison is made with other theories and very recent measurements.Comment: RevTex document, 11 pages, 4 Postscript figures are available from the authors, in press Phys. Rev. Let

Numerical time-dependent Schrödinger description of charge-exchange collisions

An implicit Fast Fourier Transform (FFT) algorithm is implemented to solve the time-dependent Schroedinger equation with application to charge-exchange collisions. Cross sections are calculated for He{sup 2} on H and compared with experiment and other theoretical results. A disagreement between previously published theoretical results is resolved