2007/04/24 by M. W. J. Bromley, J. Mitroy, K. Varga
Engineering · Physics and Astronomy · #Advanced Chemical Physics Studies #Angular momentum #Annihilation #Atomic and Molecular Physics #Atomic physics #Bound state #Electron #Muon and positron interactions and applications #Parity (physics) #Physics #Positron #Quantum mechanics #physics.atom-ph #physics.chem-ph
paper · pdf · doi:10.1103/physreva.75.062505
published as Phys.Rev.A 75 062505 (2007) · 10 pages RevTeX, 6 figures, in press Phys.Rev.A
arxiv created 2007/04/24 · openalex publication_date 2007/06/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The structure of the unnatural parity states of PsH, LiPs, NaPs, and KPs are investigated with the configuration interaction and stochastic variational methods. The binding energies (in hartree) are found to be 8.17\ifmmode×\else\texttimes\fi10^\ensuremath-4, 4.42\ifmmode×\else\texttimes\fi10^\ensuremath-4, 15.14\ifmmode×\else\texttimes\fi10^\ensuremath-4, and 21.80\ifmmode×\else\texttimes\fi10^\ensuremath-4, respectively. These states are constructed by first coupling the two electrons into a configuration which is predominantly 3Pe, and then adding a p-wave positron. All the active particles are in states in which the relative angular momentum between any pair of particles is at least L=1. The LiPs state is Borromean since there are no three-body bound subsystems (of the correct symmetry) of the (Li+, e^\ensuremath-, e^\ensuremath-, e+) particles that make up the system. The dominant decay mode of these states will be radiative decay into a configuration that autoionizes or undergoes positron annihilation.