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Projection-operator calculations of the lowest e(-)-He resonanceThe 1s (2s)2:2S Schulz resonance of He(-) is investigated theoretically, applying the full projection-operator formalism developed by Temkin and Bhatia (1985) in a Rayleigh-Ritz variational calculation. The technique is described in detail, and results for five different approximations of the He target state are presented in a table. Good convergence is obtained, but it is found that even the best calculated value of the resonance is about 130 meV higher than the experimentally measured value of 19.367 + or - 0.007 eV (Brunt et al., 1977), a discrepancy attributed to the contribution of the shift in the Feshbach formalism.
Document ID
19870037552
Document Type
Reprint (Version printed in journal)
Authors
Berk, A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bhatia, A. K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Junker, B. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Temkin, A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1986
Publication Information
Publication: Physical Review A - General Physics, 3rd Series
Volume: 34
ISSN: 0556-2791
Subject Category
ATOMIC AND MOLECULAR PHYSICS
Distribution Limits
Public
Copyright
Other