Stability of light positronic atoms: Quantum Monte Carlo studies

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Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
1996
Major/Subject
Mcode
Degree programme
Language
en
Pages
4849-4853
Series
Physical Review A, Volume 54, Issue 6
Abstract
We present accurate ground-state energies for the positronium atom in a Coulomb field of point charge Z (XZPs), for the positronium hydrogen (HPs) and positronium lithium (LiPs) atoms. Calculations are done using the diffusion quantum Monte Carlo (DQMC) method. For XZPs, the critical value of Z for binding is examined. While HPs is stable, the results show that LiPs is unstable against dissociation to a lithium atom and a positronium.
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Keywords
Coulomb field, positronium hydrogen, positronium lithium, atoms
Other note
Citation
Harju, A. & Barbiellini, B. & Nieminen, Risto M. 1996. Stability of light positronic atoms: Quantum Monte Carlo studies. Physical Review A. Volume 54, Issue 6. 4849-4853. ISSN 1050-2947 (printed). DOI: 10.1103/physreva.54.4849.