The CHIANTI database has the following primary ASCII files for this ion:
contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.
%filename: he_2.elvlc
theoretical energy levels: Connor Ballance (private communications)
%comment: An R-matrix with pseudostates He^+ calculation 1s-5g
Degenerate transitions removed within LS coupling scheme
L=0-11 exchange calculation
L=12-60 non-exchange calculation + top up
(Connor Ballance - 28th June 2003)
----------------------------------------------------------------------
Observed energy levels:
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2022). NIST Atomic Spectra Database (ver. 5.10), [Online]. Available: https://physics.nist.gov/asd [2023, October 26]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
the NIST energy levels contain the values of:
Lamb Shift of n = 1 and n = 2 States of Hydrogen-like Atoms, 1 ≤ Z ≤ 110,
V. A. Yerokhin and V. M. Shabaev,
J. Phys. Chem. Ref. Data 44, 033103 (2015)
DOI:10.1063/1.4927487
produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
K. Dere (GMU) - 2023 October 27
contains wavelengths, gf and A values of the transitions. The wavelengths are based on the experimental energy levels and should be the best available. Wavelengths calculated from the theoretical energies are of an indeterminate accuracy and their values are presented as negative values of the calculated wavelength.
%filename: he_2.wgfa % A values: Parpia, F.A., Johnson, W.R., 1972, Phys.Rev.A, 26, 1142. %oscillator strengths: Wiese, W.L., Smith, M.W., Glennon, B.M., 1966, Atomic Transition Probabilities, NSRDS-NBS-4. %note: Wiese's oscillator strengths are hydrogenic %produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data base collaboration % ------------------------------------------------------------- wavelengths determined from energy level file = he_2.elvlc updated to 2023 NIST energies minimum branching ratio = 1.00e-04 produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy K. Dere (GMU) - 2023 October 27 2023 October 27
contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).
% K.P.Dere - Jul 2, 2003
%
%produced as part of the Arcetri/Cambridge/NRL 'CHIANTI' atomic data collaboration
1 10 3.750 1.160e+04 2.320e+04 5.800e+04 8.120e+04 1.160e+05 2.320e+05 3.480e+05 5.800e+05 1.000e+06
1 9-2.034e-02 2.466e-02 2.334e-02 2.058e-02 1.962e-02 1.878e-02 1.764e-02 1.728e-02 1.716e-02 1.734e-02
1 9 3.556 1.160e+04 2.320e+04 5.800e+04 8.120e+04 1.160e+05 2.320e+05 3.480e+05 5.800e+05 1.000e+06
Degenerate transitions removed within LS coupling scheme
(Connor Ballance - 28th June 2003)
L=12-60 non-exchange calculation + top up
L=0-11 exchange calculation
Degenerate transitions removed within LS coupling scheme
%comment: An R-matrix with pseudostates He^+ calculation 1s-5g
%collision strengths: Connor Ballance (private communications)
%comment: hydrogenic f values
%oscillator strengths: Wiese, W. L., Smith, M. W., and Glennon, B. M., 1966, Atomic Transition Probabilities, NSRDS-NBS-4.
%theoretical energy levels: Connor Ballance (private communications)
%filename: he_2.splups
Page created by Giulio Del Zanna on Tue Dec 3 13:24:09 2024