Abstract
Total cross sections for single and double electron capture in collisions of bare ion with helium-like atoms are calculated at energies ranging from 50 to 6,000 keV/amu. The present calculations are carried out using four-body formalism of Coulomb–Born distorted wave formalism and boundary corrected continuum intermediate state approximation. We have made a comparison between single and double electron capture cross sections using both the methods in wide range of energies at different charge state of the projectile. Total cross sections have been calculated by summing over all the contributions up to n = 2 shells and sub-shells. It is also noted that double electron capture cross sections are small thorough out the energy region compared with the single electron capture cross sections. However, the present computed results for asymmetric collisions have been compared with available theoretical and experimental results. We find that our numerical results for total cross sections show good agreement with the available experimental findings.
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Acknowledgments
The author would like to express his gratitude to Professor C R Mandal for helpful discussions and a critical review of the manuscript. We gratefully acknowledge financial support from the Council of Scientific and Industrial Research (CSIR), New Delhi, India, under project number 03/1184/10/EMR-II.
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Appendix
Appendix
Here A, B, C and D in Eq. (13) of the main text are given by
where
The term Q1 and Q2 can be explicitly written as
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Jana, S., Purkait, M. Comparative study of single and double electron capture from atoms by fast bare ions. Indian J Phys 89, 641–647 (2015). https://doi.org/10.1007/s12648-014-0638-8
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DOI: https://doi.org/10.1007/s12648-014-0638-8