Variational method for inner-shell excitation in heavy-ion collisions
In the framework of the monopole model we study a perturbation method for inner-shell excitation which covers the whole projectile velocity region. This is achieved by introducing a velocity-dependent variational parameter and minimizing the time-dependent perturbation. We apply the method to theK-excitation of nonrelativistic systems.
Variational solution of the time dependent Coulomb problem
The problem of a hydrogen‐like atom with a time‐varying nuclear charge Z(t) is solved variationally. The evolution of the complete set of eigenfunctions is given in closed analytic form. Consequences and the relevance of the present problem for atomic collisions are discussed.
K-vacancy creation and positron emission in heavy-ion collisions
Abstract The production of K-shell vacancies during a heavy-ion collision is calculated in the adiabatic monopole approximation. For (U, U) collisions we present the cross section for positron emission in the transient supercritical field, based on this K-vacancy production probability.