Stable bound states of e{sup +}+Li and e{sup +}+Na

Journal Article · Wed Jul 01 04:00:00 EDT 1998 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.58.R4· OSTI ID:678746

Yuon, Jianmin; Morishita, Toru

Using model potentials to describe the ionic cores, we have approximated the e{sup +}+Li and e{sup +}+Na systems as quasi-three-body problems and performed adiabatic hyperspherical calculations to search for the existence of bound states. We have confirmed the existence of a bound state for e{sup +}+Li that was first predicted by Ryzhikh and Mitroy [Phys. Rev. Lett. {bold 21}, 4124 (1997)] with a binding energy of 58 meV. Further, we predict the existence of a stable bound state for e{sup +}+Na with a binding energy of 7 meV and explain why bound states exist for these two systems but not for the e{sup +}+H system, despite the fact that H{sup {minus}} has a higher binding energy than either Li{sup {minus}} or Na{sup {minus}}. Based on this work, we find that it is unlikely that positrons can form stable bound states with any other of the alkali-metal atoms. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 678746
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 58; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BINDING ENERGY
BOUND STATE
ELECTRONIC STRUCTURE
LITHIUM
POSITRON-ATOM COLLISIONS
POTENTIAL ENERGY
SODIUM