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Atoms 2016, 4(1), 3; doi:10.3390/atoms4010003

Natural and Unnatural Parity Resonance States in the Positron-Hydrogen System with Screened Coulomb Interactions

1
Department of Physics, University of New Brunswick, Fredericton NB E3B 5A3, Canada
2
Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editors: Chi Yu Hu and Anand K. Bhatia
Received: 22 November 2015 / Revised: 20 December 2015 / Accepted: 22 December 2015 / Published: 26 December 2015
View Full-Text   |   Download PDF [5725 KB, uploaded 29 December 2015]   |  

Abstract

In the present work, we report calculations of resonances in the positron-hydrogen system interacting with screened Coulomb potentials using the method of complex scaling together with employing correlated Hylleraas wave functions. Resonances with natural and unnatural parities are investigated. For the natural parity case, resonance parameters (energy and width) for D-wave resonance states with even parity lying below various positronium and hydrogen thresholds up to the H(N = 4) level are determined. For the unnatural parity case, results for P-even and D-odd resonance states with various screened Coulomb interaction strengths are located below different lower-lying Ps and H thresholds. View Full-Text
Keywords: positron hydrogen; resonances; complex scaling; screened Coulomb potentials; Hylleraas functions; Debye plasmas positron hydrogen; resonances; complex scaling; screened Coulomb potentials; Hylleraas functions; Debye plasmas
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ning, Y.; Yan, Z.-C.; Ho, Y.K. Natural and Unnatural Parity Resonance States in the Positron-Hydrogen System with Screened Coulomb Interactions. Atoms 2016, 4, 3.

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