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Photodetachment of the Positronium Negative Ion with Excitation in the Positronium Atom

Heliophysics Science Division, NASA/Goddard Space Flight Center, Greenbelt, MD 20711, USA
Received: 19 October 2018 / Revised: 18 December 2018 / Accepted: 22 December 2018 / Published: 26 December 2018
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Abstract

Lyman-α radiation ( 2 P 1 S ) has been seen from astrophysical sources and the sun. The line shape of this transition has been measured recently in Ps atoms both inside and outside a porous silica target. In the photodetachment of Ps, the residual Ps atom can be left in the 2P state instead of the 1S state giving rise to positronium Lyman radiation at 2432 A0. Photodetachment cross sections of Ps have been calculated when the Ps atom is left in nP states, n being 2, 3, 4, 5, 6 and 7, using the asymptotic form of the bound-state wave function and a plane wave for the final state wave function, following the approach of Ohmura and Ohmura [Phys. Rev. 1960, 118, 154] in the photodetachment of H. View Full-Text
Keywords: photoionization; photoabsorption; photodetachment photoionization; photoabsorption; photodetachment
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Bhatia, A.K. Photodetachment of the Positronium Negative Ion with Excitation in the Positronium Atom. Atoms 2019, 7, 2.

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