Classical and Quantum Mechanical Investigations on Charge Transfer in Heavy Ion-Atom Interactions

Abstract

Theoretical investigations on charge transfer in collisions of fully stripped ions with neutral atoms are exhaustive [1–4]. In contrast, a few theoretical studies [5–10] have so far been made to study charge transfer cross sections in collisions of partially stripped ions with neutral atoms at intermediate and high-energy region. In this respect, the scenario of experimental investigations on partially and fully stripped ions is well balanced. In this connection, works of Goffe et al [11] and Phaneuf et al [12] are worthy of mentioning. Olson and Salop [5] have calculated charge transfer and ionization cross sections by fully and partially stripped ions of B^q+, C^q+, N^q+ and O^q+ (q≥3) from atomic hydrogen in the framework of Classical Trajectory Monte Carlo (CTMC) simulation method in intermediate and high energy region. They have treated the interaction of the active electron with projectile ion as coulombic with an effective charge determined from spectroscopic data. Eichler et al [6] have calculated charge transfer cross sections for the same processes except for B^q+ replaced by Li^q+ (q ≥ 3) in OBK- approximation. They have treated the projectile ions as bare ions with asymptotic charge (q). However, they have multiplied the calculated cross sections by a reduction factor obtained from eikonal approximation and successively by Pauli blocking factor.