Two-Photon Detachment Cross Section of the Positronium Negative Ion |
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| Authors: | Akinori Igarashi |
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| Institution: | 1. Faculty of Engineering, University of Miyazaki, Miyazaki, 889-2192, Japan
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| Abstract: | The two-photon detachment cross section of positronium negative ion is calculated within the lowest-order perturbation theory for the final-state energies below the Ps(n = 2) threshold. A coupled-channel method with positronium orbital expansion is used to prepare the wavefunctions. The resonance structure below the threshold is clearly seen. |
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