C IV - VERSION 11.0

The CHIANTI database has the following primary ASCII files for this ion:

c_4.elvlc (energy levels)

contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.

 
%filename:  c_4.elvlc.olg.nist

Theoretical energy levels:
Autostructure calculation with energy levels optimized to match to the observed energies
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

optimization by means of AS SHFTIC file with corrections from the following data

Observed bound energy levels n=2, 3, 4, 5, 6, 7 :
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2012).
NIST Atomic Spectra Database (ver. 5.0), [Online].
Available: http://physics.nist.gov/asd [2012, September 14].
National Institute of Standards and Technology, Gaithersburg, MD.

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

produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
 K. Dere (GMU) - 2017 August 10

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:  c_4.wgfa.olg.imp

Theoretical gf and A-values:  
Optimized 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

optimization by means of AS SHFTIC file with corrections from the following data

Observed bound energy levels n=2, 3, 4, 5, 6, 7 :
Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2012).
NIST Atomic Spectra Database (ver. 5.0), [Online].
Available: http://physics.nist.gov/asd [2012, September 14].
National Institute of Standards and Technology, Gaithersburg, MD.

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

wavelengths determined from energy levels
minimum branching ratio =   1.00e-04

 allWvl =   1
 minDiff =      0.00010
 
produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
 K. Dere (GMU) - 2017 August 10
%File processed with wgfa_tidy by pryoung on  6-Mar-2019
%File processed with wgfa_tidy by pryoung on 31-May-2023

c_4.scups (electron collision data)

contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

 
 K. Dere (GMU) - 2014 December 21                                                                   
produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy                  

collision strengths provided in the range   3.20e+03 to   3.20e+07 K                                
ADS ref:  https://ui.adsabs.harvard.edu/abs/2011A%26A...528A..69L/abstract                          
DOI:  https://ui.adsabs.harvard.edu/link_gateway/2011A&A...528A..69L/doi:10.1051/0004-6361/201016417
Astronomy & Astrophysics, Volume 528, id.A69, 15 pp                                                 
including Auger and radiation damping                                                               
R-matrix electron-impact excitation data for the Li-like iso-electronic sequence                    
Liang, G. Y.; Badnell, N. R.                                                                        
Theoretical collision strengths:                                                                    

%filename:  c_4.scups

(proton collisional data) Not available in this VERSION.

The html table below contains the radiative data of the brightest lines sorted in wavelength

c_4_table.html (html table)