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: s_15.elvlc
Theoretical energy levels: Autostructure calculation
A Breit-Pauli distorted wave implementation for AUTOSTRUCTURE
Badnell, N.R., 2011, Computer Physics Communications, 182, 1528
ADSref: http://adsabs.harvard.edu/abs/2011CoPhC.182.1528B
Observed energy levels (w) 19846410.
K Kubicek and H Bruhns and J Braun and J R Crespo Lopez-Urrutia and J Ullrich
Two-loop {QED} contributions tests withmid-{ZHe}-like ions2009, Journal of Physics: Conference Series, 163, 012007
ADSref: https://ui.adsabs.harvard.edu/abs/1982PhyS...25..917S/abstract
Observed energy level (y) 19736790.
L Schleinkofer and F Bell and H-D Betz and G Trollmann and J Rothermel
Precision Wavelength Determination of 21P1-11S0and 23P1-11S0Transitions in Helium-Like Sulfur Ions
1982, Physica Scripta, 25, 6B, 917--923
(Observed) energy levels (1s2s, 1s2p): Artemyev, A. N.; Shabaev, V. M.; Yerokhin, V. A.; Plunien, G.; Soff, G., 2005, Phys. Rev. A, 72, 2104
ADSref: http://adsabs.harvard.edu/abs/2005PhRvA..71f2104A
Observed bound energy levels: Martin, W. C., Sugar, J., Musgrove, A., and Dalton, G. R., 1995,
NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
Theoretical energies for n=2, 3 above IP
Goryaev, F. F.; Vainshtein, L. A.; Urnov, A. M.
Atomic data for doubly-excited states 2lnl of He-like ions and 1s2lnl of Li-like ions with Z = 6-36 and n = 2 , 3
2017, ADNDT, 113, 117-257
adsRef: http://adsabs.harvard.edu/abs/2017ADNDT.113..117G
DOI: 10.1016/j.adt.2016.04.002
Theoretical energy levels (n=4,5 above IP):
calculations of U. Safronova reported in Kato et al., 1997, ADNDT, 67, 225.
ADS http://adsabs.harvard.edu/abs/1997ADNDT..67..225K
updated by U. Safronova, 2001, private communication
theoretical energy levels adjusted by SHFTIC file derived from
Kubicek, Schleinkofer, Artemyev, NIST, Goryaev (n=2, 3 above IP) and Safronova (n= 4,5,6 above IP energies
produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
K. Dere (GMU) - 2020 June 23
s_15 IP ev = 3.22378e+03 Ip invcm = 26001513.000 Ip Ryd = 236.94321
s_16 IP ev = 3.49419e+03 Ip invcm = 28182526.000 Ip Ryd = 256.81807
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: s_15.wgfa
Theoretical gf and A-values: Autostructure calculation
A Breit-Pauli distorted wave implementation for AUTOSTRUCTURE
Badnell, N.R., 2011, Computer Physics Communications, 182, 1528
ADSref: http://adsabs.harvard.edu/abs/2011CoPhC.182.1528B
Observed energy levels (w) 19846410.
K Kubicek and H Bruhns and J Braun and J R Crespo Lopez-Urrutia and J Ullrich
Two-loop {QED} contributions tests withmid-{ZHe}-like ions2009, Journal of Physics: Conference Series, 163, 012007
ADSref: https://ui.adsabs.harvard.edu/abs/1982PhyS...25..917S/abstract
Observed energy level (y) 19736790.
L Schleinkofer and F Bell and H-D Betz and G Trollmann and J Rothermel
Precision Wavelength Determination of 21P1-11S0and 23P1-11S0Transitions in Helium-Like Sulfur Ions
1982, Physica Scripta, 25, 6B, 917--923
Observed energy levels (1s2s, 1s2p): Artemyev, A. N.; Shabaev, V. M.; Yerokhin, V. A.; Plunien, G.; Soff, G., 2005, Phys. Rev. A, 72, 2104
ADSref: http://adsabs.harvard.edu/abs/2005PhRvA..71f2104A
Observed bound energy levels: Martin, W. C., Sugar, J., Musgrove, A., and Dalton, G. R., 1995,
NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.
Theoretical energies for n=2, 3 above IP
Goryaev, F. F.; Vainshtein, L. A.; Urnov, A. M.
Atomic data for doubly-excited states 2lnl of He-like ions and 1s2lnl of Li-like ions with Z = 6-36 and n = 2 , 3
2017, ADNDT, 113, 117-257
adsRef: http://adsabs.harvard.edu/abs/2017ADNDT.113..117G
DOI: 10.1016/j.adt.2016.04.002
Theoretical energy levels (n=4,5 above IP):
calculations of U. Safronova reported in Kato et al., 1997, ADNDT, 67, 225.
ADS http://adsabs.harvard.edu/abs/1997ADNDT..67..225K
updated by U. Safronova, 2001, private communication
theoretical energy levels adjusted by SHFTIC file derived from
Kubicek, Schleinkofer, Artemyev, NIST, Goryaev (n=2, 3 above IP) and Safronova (n= 4,5,6 above IP energies
two-photon A-value: Derevianko, A.; Johnson, W. R., 1997, Phys Rev A, 56, 1288
Two-photon decay of 2 1S0 and 2 3S1 states of heliumlike ions
ADSref: https://ui.adsabs.harvard.edu/abs/1997PhRvA..56.1288D/abstract
minimum branching ratio = 1.00e-04
wavelengths determined from energy levels
sorted by lvl12
elvlcName = s_15.elvlc
wgfaName = s_15.wgfa-srt
allWvl = 1
minDiff = 0.00010
outfile = s_15.wgfa.olg.imp
produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
K. Dere (GMU) - 2020 June 23
P. Young (GSFC) - 2020 Nov 12, updated 2-photon rate.
%File processed with wgfa_tidy by pryoung on 31-May-2023
contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).
K. Dere (GMU) - 2020 June 24 produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy collision strengths provided in the range 4.50e+04 to 4.50e+08 K DOI: http://dx.doi.org/10.1088/0953-4075/34/15/320 adsRef: http://adsabs.harvard.edu/abs/2001JPhB...34.3179W A radiation-damped R-matrix approach to the electron-impact excitation of helium-like ions for diagnostic application to fusion and astrophysical plasmas Whiteford, A. D.; Badnell, N. R.; Ballance, C. P.; O'Mullane, M. G.; Summers, H. P.; Thomas, A. L. filename: s_15.scups
Page created by Giulio Del Zanna on Wed Apr 16 17:44:15 2025