Positronic lithium, an electronically stable Li-e$^+$ ground state

Details Positronic lithium, an electronically stable Li-e$^+$ ground state Positronic lithium, an electronically stable Li-e$^+$ ground state

1997-10-30

arxiv.org/abs/physics/9710044v1

Physics

Atomic Physics

11 pages, 2 tables. To be published in Phys.Rev.Lett

Scientific paper

10.1103/PhysRevLett.79.4124

Calculations of the positron-Li system were performed using the Stochastic Variational Method and yielded a minimum energy of -7.53208 Hartree for the L=0 ground state. Unlike previous calculations of this system, the system was found to be stable against dissociation into the Ps + Li$^+$ channel with a binding energy of 0.00217 Hartree and is therefore electronically stable. This is the first instance of a rigorous calculation predicting that it is possible to combine a positron with a neutral atom and form an electronically stable bound state.

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