Stability of light positronic atoms: Quantum Monte Carlo studies

A. Harju; B. Barbiellini; R.M. Nieminen

doi:10.1103/PhysRevA.54.4849

Stability of light positronic atoms: Quantum Monte Carlo studies

A. Harju, B. Barbiellini, R.M. Nieminen

Department of Applied Physics

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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.

Original language	English
Pages (from-to)	4849-4853
Journal	Physical Review A
Volume	54
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevA.54.4849
Publication status	Published - 1996
MoE publication type	A1 Journal article-refereed

Keywords

Positron annihilation
Quantum Monte Carlo

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title = "Stability of light positronic atoms: Quantum Monte Carlo studies",

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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author = "A. Harju and B. Barbiellini and R.M. Nieminen",

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journal = "Physical Review A",

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AU - Harju, A.

AU - Barbiellini, B.

AU - Nieminen, R.M.

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N2 - 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.

AB - 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.

KW - Positron annihilation

KW - Quantum Monte Carlo

KW - Positron annihilation

KW - Quantum Monte Carlo

KW - Positron annihilation

KW - Quantum Monte Carlo

U2 - 10.1103/PhysRevA.54.4849

DO - 10.1103/PhysRevA.54.4849

M3 - Article

SN - 2469-9934

SN - 1094-1622

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SP - 4849

EP - 4853

JO - Physical Review A

JF - Physical Review A

IS - 6

ER -

Stability of light positronic atoms: Quantum Monte Carlo studies

Abstract

Keywords

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