Stability of light positronic atoms: Quantum Monte Carlo studies

Journal Article · Sun Dec 01 00:00:00 EST 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.54.4849· OSTI ID:397540

Harju, A; Barbiellini, B; Nieminen, R M ^[1]

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1. Laboratory of Physics, Helsinki University of Technology, FIN-02150 Espoo (Finland)

We present accurate ground-state energies for the positronium atom in a Coulomb field of point charge {ital Z} ({ital X}{sup {ital Z}}Ps), for the positronium hydrogen (HPs) and positronium lithium (LiPs) atoms. Calculations are done using the diffusion quantum Monte Carlo (DQMC) method. For {ital X}{sup {ital Z}}Ps, the critical value of {ital 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. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 397540
• Journal Information: Physical Review A, Vol. 54, Issue 6; Other Information: PBD: Dec 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
POSITRONIUM
GROUND STATES
LITHIUM COMPOUNDS
POSITRONIUM COMPOUNDS
STABILITY
LITHIUM
MONTE CARLO METHOD
ENERGY LEVELS
DISSOCIATION