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arXiv · 2305.17078

Production of positronium chloride: A study of the charge exchange reaction between Ps and Cl$^{-}$

K. Lévêque-Simon·A. Camper·R. Taïeb·J. Caillat·C. Lévêque·E. Giner
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Abstract

We present cross sections for the formation of positronium chloride (PsCl) in its ground state from the charge exchange between positronium (Ps) and chloride (Cl$^-$) in the range of 10 meV - 100 eV Ps energy. We have used theoretical models based on the first Born approximation in its three-body formulation. We simulated the collisions between Ps and Cl$^-$ using ab-initio methods at both mean-field and correlated levels extrapolated to the complete basis set limit. We have investigated Ps excited states up to ${n=4}$. The results suggest that the channel Ps(${n=2}$) is of particular interest for the production of PsCl in the ground state, and shows that an accurate treatment of the electronic correlation leads to a significant change in the global shape of the PsCl production cross section with respect to the mean-field level.

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K. Lévêque-Simon, A. Camper, R. Taïeb, J. Caillat, C. Lévêque, E. Giner. 2023-05-26. Production of positronium chloride: A study of the charge exchange reaction between Ps and Cl$^{-}$. https://arxiv.org/abs/2305.17078

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