Second Bound State of PsH

2006/11/18 by J. Mitroy, M. W. J. Bromley · 1 citation
Engineering · Physics and Astronomy · #Advanced Chemical Physics Studies #Atomic and Molecular Physics #Muon and positron interactions and applications #physics.atom-ph #physics.chem-ph

paper · pdf · doi:10.1103/physrevlett.98.063401

published as Phys.Rev.Lett. 98 (2007) 063401 · 4 pages, 2 figures, RevTex style

arxiv created 2006/11/18 · openalex publication_date 2007/02/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

The existence of a second bound state of PsH that is electronically stable and also stable against positron annihilation by the normal 2\ensuremathγ and 3\ensuremathγ processes is demonstrated by explicit calculation. The state can be found in the ^2,4S^o symmetries with the two electrons in a spin-triplet state. The binding energy against dissociation into the H(2p)+Ps(2p) channel was 7.03\ifmmode×\else\texttimes\fi10^\ensuremath-4 hartree. The dominant decay mode of the states will be radiative decay into a configuration that autoionizes or undergoes positron annihilation. The NaPs system of the same symmetry is also electronically stable with a binding energy of 1.514\ifmmode×\else\texttimes\fi10^\ensuremath-3 hartree with respect to the Na(3p)+Ps(2p) channel.

Citations

• Lowest open channels, bound states, and narrow resonances of dipositronium
• Convergence of the partial wave expansion of the He ground state

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• Positronic complexes with unnatural parity