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

Atoms

Ye Ning¹  Zong-Chao Yan¹  Yew Kam Ho²  Chi Yu Hu³ 

[1]Department of Physics, University of New Brunswick, Fredericton NB E3B 5A3, Canada

[2]

[3]Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan

[4]Department of Physics, University of New Brunswick, Fredericton NB E3B 5A3, Canada

关键词: positron hydrogen;    resonances;    complex scaling;    screened Coulomb potentials;    Hylleraas functions;    Debye plasmas;   

DOI  :  10.3390/atoms4010003

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.