Complex-coordinate calculations of doubly excited [sup 1,3][ital D[ital e]] resonant states of Ps[sup [minus]]

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.264· OSTI ID:6380943

Bhatia, A K ^[1]; Ho, Y K ^[2]

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1. Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States)
2. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001 (United States)

Doubly excited [sup 1,3][ital D[ital e]] resonant states in positronium ions Ps[sup [minus]] are calculated by using a method of complex-coordinate rotation. Resonance parameters (both resonance positions and widths) for doubly excited states associated with the [ital n]=2 and 3 thresholds of positronium atoms are evaluated using elaborate Hylleraas-type functions. In addition to Feshbach-type resonances lying below the Ps thresholds, we have also identified two [sup 1][ital D[ital e]] shape resonances lying above the [ital n]=3 Ps threshold.

• OSTI ID: 6380943
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664500* -- Special Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CHARGED PARTICLES
COORDINATES
D STATES
ENERGY
ENERGY LEVELS
EXCITED STATES
HYLLERAAS COORDINATES
IONS
POSITRONIUM
RESONANCE
ROTATIONAL TRANSFORM
THRESHOLD ENERGY