Total and differential electron capture cross sections in B³⁺/He collisions

Abstract

Absbaer Total, partial and differential cross sections for charge exchange collisions between B3+ and He have been determined in the 1 eV-10 keV energy range. The results are in excellent agreement with experiment and show lhal model poteutial calculations can be successfully adapted to the study of two-electron systems. The role of rotational coupling and the Srueckelberg oscillafions of the differential cmss sections are carefully examined.

Quantum Charge Transfer Study of Triply Charged Ions in the Adiabatic Representation: the (BHe)3+ System

“…This can be analysed by checking the potential parameters used in the two calculations as shown in Table 2 and compared with other calculations. The present results are equivalent to those of Fraija and co-workers and the greatest disagreement might be due to the small ∆E of the outer crossing of the model potential 22 . In this case our ∆E is almost twice that of the Gargaud results.…”

“…In the former case the potential model was parametrized for the asymptotic energies which have provided an error less than 0.0001%. Therefore one can expect that the potential used in the present work can be more reliable for describing the charge transfer process than that reported by Gargaud and collaborators 22 , although they have good agreement for the collision energy range used in this work.…”

“…Moreover, it can also be observed from Table 1 that the charge transfer processes, for high energy collisions is not a two state problem. Figure 1 compares the total cross section out of the covalent state with the calculations of Gargaud and co-workers 22 . When the energy increases above 51 eV the agreement becomes poorer and the main reason for this is certainly due to the absence of rotational coupling which is important for higher collision energies.…”

“…Such a deviation can also be attributed to the difference between the intermolecular potential of Gargaud el al. 22 and the ab-initio potential of Lópes-Castillo and Ornellas 16 . This can be analysed by checking the potential parameters used in the two calculations as shown in Table 2 and compared with other calculations.…”

“…Such a method is well detailed elsewhere 8 and will not be repeated here. Since there is no experimental data in this collision energy range, a comparison with previous theoretical work will be done 22 . Actually, the low collision energy used in the present calculations could be achieved by experimentalists for carrying out measurements in this energy range.…”