Journal ArticleDOI
Ground state of positronium hydride
Alexei M. Frolov,Vedene H. Smith +1 more
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TLDR
The ground bound state in the positronium hydride molecule (HPs) was determined from extensive variational four-body calculations with the James-Coolidge four body variational expansion as mentioned in this paper.Abstract:
The ground bound state in the positronium hydride molecule (HPs) is determined from extensive variational four-body calculations with the James-Coolidge four-body variational expansion in the relative coordinates r{sub 12},r{sub 13},r{sub 23},r{sub 14},r{sub 24}, and r{sub 34}. For the positronium hydride with the infinitely heavy nucleus ({sup {infinity}}HPs) the total energy found, E={minus}0.7891369 a.u., is one of the lowest variational values published to date. A number of bound-state properties have been calculated also, including the {delta}-function expectation values, two-body cusps, and the two-photon annihilation rate. {copyright} {ital 1997} {ital The American Physical Society}read more
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Journal ArticleDOI
The structure of exotic atoms containing positrons and positronium
TL;DR: In this paper, the binding energies and annihilation rates for seven exotic species with electronically stable ground states, namely HPs,, LiPs,,, NaPs and have been predicted, using a large-scale variational expansion in terms of a basis of explicitly correlated Gaussian functions.
Journal ArticleDOI
The quantum theory of atoms in positronic molecules: A case study on diatomic species
Mohammad Goli,Shant Shahbazian +1 more
TL;DR: In this paper, the authors presented the first systematic study of a series of diatomic positronic species using the recently proposed regional approach: the quantum theory of atoms in positronic molecules (QTAIPM).
Journal ArticleDOI
Configuration interaction calculations of positronic atoms and ions
TL;DR: The configuration interaction (CI) method is one of the most commonly used methods for the calculation of the electronic structure of atoms as mentioned in this paper, and it has been adapted to calculate the structure of exotic atoms containing one or two electrons and a positron.
Journal ArticleDOI
Ground-state energy and relativistic corrections for positronium hydride
Sergiy Bubin,Kalman Varga +1 more
TL;DR: In this article, the ground state of positronium hydride (HPs) is reported, including various expectation values, electron-positron annihilation rates, and leading relativistic corrections to the total and dissociation energies.
Journal ArticleDOI
Is positronium hydride atom or molecule
TL;DR: In this article, the structure of positronium hydride is established from analysis of electron, positron, and electron-positron pair density functions which are built from accurate Hylleraas-type wave function.
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