Comment on 'Doubly excited bound and resonance ({sup 3}P{sup e}) states of helium'

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.036501· OSTI ID:21450677

Kar, Sabyasachi ^[1]; Ho, Y K ^[2]

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1. Center for Theoretical Atomic and Molecular Physics, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080 (China)
2. Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 106 (China)

Recently a study [J. K. Saha and T. K. Mukherjee, Phys. Rev. A 80, 022513 (2009)] on the doubly excited {sup 3}P{sup e} states of helium reports some resonance states that are not in conformity with previously published works [Y. K. Ho and A. K. Bhatia, Phys. Rev. A 47, 2628 (1993)]. Owing to discrepancies between the works, we investigate the resonance parameters (positions and widths) of the doubly excited Feshbach resonances of the {sup 3}P{sup e} symmetries associated with N = 3, 4, and 5 He{sup +} thresholds using a different choice of correlated wave functions in the framework of the complex-coordinate rotation method and the stabilization method. Resonance parameters below the N=4 and N=5 He{sup +} thresholds obtained from the present calculations are not consistent with the results and discussions made in the recent work. Here we point out an error in assessment made by Saha and Mukherjee in an earlier work as well as the lack of numerical accuracy of the results for some high-lying doubly excited states reported by Saha and Mukherjee. The bound 2p{sup 2} {sup 3}P{sup e} and 2p3p {sup 3}P{sup e} state energies obtained from this calculation are consistent with the best reported results but not with the reported values of Saha and Mukherjee.

• OSTI ID: 21450677
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BOUND STATE
CHARGED PARTICLES
COORDINATES
ELEMENTS
ENERGY LEVELS
ERRORS
EXCITED STATES
FLUIDS
FUNCTIONS
GASES
HELIUM
HELIUM IONS
IONS
LEVEL WIDTHS
MOTION
NONMETALS
P STATES
RARE GASES
RESONANCE
ROTATION
STABILIZATION
WAVE FUNCTIONS