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  1. 1 Acta Physica Polonica A

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  1. 1 2008

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  1. 1 Strasburger K.

  2. 1 Wołcyrz M.

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Theoretical Study of Positronic Atoms with Adiabatic Separation of Positronic Motion

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Strasburger K., Wołcyrz M.
Acta Physica Polonica A
|
2008
|
vol. 113
|
issue 5
1533-1542
EN
A modified adiabatic approximation, with the positron treated as a light nucleus and its charge included only partially in the electronic Hamiltonian, was applied to compute the energies and properties of bound states of lithium positride, positronic beryllium and positronic magnesium. The electronic Schrödinger equation was solved with the configuration interaction method. No bound state was obtained for lithium positride, while the dissociation energies of positronic beryllium and positronic magnesium were underestimated by 2.6 and 7 millihartrees, respectively. Consequences for the applicability of the adiabatic approximation to describe positronic systems are discussed.
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