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Title: Chemical stability of positronic complexes with atoms and atomic ions

A simple theory for establishing the stability or instability of positron-atomic systems against dissociation is presented. The theory consists of assuming that Morse-potential parameters for protonic diatoms are transferrable to the corresponding positronic molecules, and making appropriate reduced-mass modifications in the calculation of binding energies. The surprisingly good reliability of the method is established by appealing to the well-known positronium affinities of atomic hydrogen and fluorine. Positronium (Ps) binding is found for about half of the 42 atoms tested. In addition, instability is indicated for all nine positron-atom systems tested, and stability is indicated for seven of eight negatively charged systems tested; e.g., PsO/sup -/.
Authors:
; ;
Publication Date:
OSTI Identifier:
6259487
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. A; (United States); Journal Volume: 30:4; Journal Issue: 4
Research Org:
Chemistry Department, Marquette University, Milwaukee, Wisconsin 53233
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; POSITRONIUM COMPOUNDS; CHEMICAL PROPERTIES; STABILITY; AFFINITY; BOUND STATE; COMPARATIVE EVALUATIONS; DIAGRAMS; DIMERS; DISSOCIATION; MORSE POTENTIAL; POTENTIAL ENERGY; ENERGY; POTENTIALS 640303* -- Atomic, Molecular & Chemical Physics-- Positronium, Muonium, & Muonic & Mesic Atoms & Molecules