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Single Ionization of He by High-Energy Proton and Antiproton. A QED Approach

100%

Bhattacharyya S., Pathak K.

Acta Physica Polonica A

2000

vol. 98

issue 4

335-344

We have investigated single ionization of He by fast proton and antiproton using a QED approach. A field theoretical calculation gives the total cross-section of He in single ionization, from which it is seen that the projectile p^{+} or p^{-} gives almost the same values of cross-section. We have also compared our results with other theoretical and experimental results available in this context yet. Behaviour of the cross-section at a lower spectrum of projectile energy is discussed.

Angular Differential Cross-Sections for Electron Transfer in Collisions between Proton and He^{+}(1s) Ions

81%

Bhattacharyya S., Pathak K., Becker A., Faisal F.

Acta Physica Polonica A

1996

vol. 90

issue 6

1143-1153

Angular differential cross-sections for the formation of H, as a result of electron capture by proton from He^{+}(1s) at the centre-of-mass energies from 4 to 24 keV, are calculated using distorted wave Coulomb-Born approximation. The total interaction potentials in the prior-interaction channel and in the post-interaction channel are considered. Coulomb boundary conditions are taken care of with the proper choice of the perturbation potentials in both the prior and the post channels. A prior-post discrepancy is noted. Existing theoretical results are presented along with the present results.

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2 Acta Physica Polonica A

1 2000

1 1996

2 Bhattacharyya S.

2 Pathak K.

1 Becker A.

1 Faisal F.

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Single Ionization of He by High-Energy Proton and Antiproton. A QED Approach

Angular Differential Cross-Sections for Electron Transfer in Collisions between Proton and He^{+}(1s) Ions