Quantum-Semiclassical Calculation of Transition Probabilities in Antiproton Collisions with Helium Ions

摘要

We have developed a quantum-semiclassical approach for calculation of transition probabilities in few-dimensional quantum systems. In this approach the problem is reduced to the Schrodinger-like equation for some degrees of freedom which integrated symphoniously with the classical equations describing the remaining part. This approach was successfully applied for treating self-ionization of hydrogen-like ions in magnetic fields, break-up of some halo nuclei and for excitation and stripping of helium ions by protons. Here we present the method application to calculation of ionization and excitation/deexcitation of helium ions by slow antiprotons. The calculated cross sections are important for experimental investigations in antiproton physics. Moreover, the considered case is very perspective as an object for investigation of quantum measurements. Actually, the charge-exchange channel, dominant in collisions with protons, is absent in our case and all possible quantum communication channels are accurately described in our approach.