State-selective electron capture in the interactions of partially stripped ions of beryllium and boron with atomic hydrogen in the ground state

Abstract

The Coulomb-Born approximation has been employed to study charge transfer cross sections in the case of collisions of Be q+ (q = 1-3) and B q+ (q = 1-4) with atomic hydrogen in its ground state, respectively, within the energy range of 25-200 keV amu −1 . The interaction of the active electron with the incoming projectile ion has been approximated by a model potential. Cross sections for capture into different sub-shells have been given in tabular form. Computed total capture cross sections compare favourably with existing available results.

Charge transfer cross section calculation and evaluation for Be[sup q+]+H collisions

“…The TDSE result at 25keV/u agrees very well with the AOCC results. The CB results of Das et al [13] by using SS potential agree well with our AOCC results at E>100keV/u. In the overlapping energy range of 1.5-10keV/u, our QMOCC results are a little different with the AOCC results.…”

“…At 5keV/u, the TDSE results are smaller than those of AOCC results, but the relative magnitude of each n is consistent. The CB results of Das et al [13] are smaller than the present results. The n-selective charge transfer cross sections for the Be + +H collision.…”

“…The calculated total cross sections are show in figure 1, and compared with the CB results of Das et al [13]. Our QMOCC and AOCC results can connect each other well in the overlapping energy range.…”

“…On the theoretical side, systematic cross section calculations for the Be q+ +H (q=2-4) charge exchange collisions have been performed using the classical trajectory Monte Carlo (CTMC) method by Schultz et al [12]. The CoulombBorn (CB) approximation and the boundary corrected continuum intermediate state (BCCIS) approximation are employed by Das et al [13,14] for q=1-3 and for q=1-4, respectively, in the energy range of 25-200keV/u for the total cross section and in the range of 40-200 keV/u for the state-selective cross sections. In their CB calculation, the model potential, Slater screening (SS) model and binding energy screening (BES) model are used.…”

“…The n-selective cross sections for electron capture to Be(2snl) (n=2-4) states are shown in figure 2, and compared with the CB results of Das et al [13] by model potential. Limited by the molecular basis in our QMOCC calculation, it can only give the n=2 results, which is the main capture channels for this collision system because of the small energy difference.…”