Published October 26, 1992
| Version v1
Journal article
Positronium negative ion: Molecule or atom?
Creators
- 1. Fakultaet fuer Physik der Universitat, Hermann-Herder-Strasse 3 7800 Freiburg (Germany)
- 2. Department of Chemistry, University of Washington BG-10, Seattle, Washington 98195 (United States)
Description
A highly accurate calculation is supplemented by an adiabatic approximation to explore the resonance spectrum of positronium Ps-. Surprisingly, the spectrum can be understood and classified with H2+ quantum numbers by treating the interelectronic axis of Ps- as an adiabatic parameter. We report and interpret the existence of 1S shape resonances, a phenomenon so far unknown in three-body Coulomb systems. The new results on Ps- combined with previous results for H- suggest the existence of a resonance spectrum and its similarity for all ABA Coulomb systems with charges |ZA/ZB|=1 and masses mA/mB≥1
Additional details
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 69
- Journal Issue
- 17
- Journal Page Range
- p. 2499-2502.
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24021200
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ADIABATIC APPROXIMATION; ANIONS; CORRELATIONS; ENERGY SPECTRA; HYDROGEN IONS 1 MINUS; POSITRONIUM; QUANTUM NUMBERS; RESONANCE; THEORETICAL DATA
- Descriptors DEC
- CHARGED PARTICLES; DATA; HYDROGEN IONS; INFORMATION; IONS; NUMERICAL DATA; SPECTRA