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Interaction of positronium with helium atoms — the classical treatment of the 5-body collision system

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Abstract

The interaction between positronium and a helium atom is studied using the 5-body classical trajectory Monte Carlo method. We present the total cross sections for the dominant channels, namely for single ionization of the target, and ionization of the projectile, resulting from pure ionization and also from electron transfer (capture or loss) processes for 1–5.7 a.u. incident velocities of the positronium atom. Our results were compared with the calculated data using hydrogen projectiles having the same velocities as well as with the experimental data in collisions between H and He [R.D. DuBois, Á. Kövér, Phys. Rev. A 40, 3605 (1989)]. We analyze the similarities and deviations for ionization of helium atoms by positronium and hydrogen projectile impact.

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Correspondence to Károly Tőkési.

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Contribution to the Topical Issue “Electron and Positron Induced Processes”, edited by Michael Brunger, Radu Campeanu, Masamitsu Hoshino, Oddur Oddur Ingólfsson, Paulo Limão-Vieira, Nigel Mason, Yasuyuki Nagashima and Hajime Tanuma.

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Tőkési, K., DuBois, R.D. & Mukoyama, T. Interaction of positronium with helium atoms — the classical treatment of the 5-body collision system. Eur. Phys. J. D 68, 255 (2014). https://doi.org/10.1140/epjd/e2014-40800-9

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  • DOI: https://doi.org/10.1140/epjd/e2014-40800-9

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