Abstract
We present calculated integral cross section and annihilation parameter (Z eff) for positron collisions against the H 2 molecule. The results were obtained with the Schwinger multichannel method (SMC) [ J. S. E. Germano and M. A. P. Lima, Phys. Rev. A 47, 3976 (1993) ]. Our model takes correlation-polarization forces into account and completely disregards nuclear motion and real positronium formation. The results indicate that the occurrence of an electronic Feshbach resonance should lead to high annihilation rates.
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Varella, M.T.d.N., de Carvalho, C.R.C., Lima, M.A.P. (2001). On the Contribution of Polarization - Correlation Forces to High Annihilation Rates in Positronmolecule Collisions. In: Surko, C.M., Gianturco, F.A. (eds) New Directions in Antimatter Chemistry and Physics. Springer, Dordrecht. https://doi.org/10.1007/0-306-47613-4_26
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DOI: https://doi.org/10.1007/0-306-47613-4_26
Publisher Name: Springer, Dordrecht
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