Si I - VERSION 11.0.1

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

si_1.elvlc (energy levels)

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

 
filename:si_1.elvlc

Experimental energies from: Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2023). NIST Atomic Spectra Database (ver. 5.11), [Online]. Available: https://physics.nist.gov/asd [2024, August 29]. National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F

Theoretical energies from: Dufresne, R.P., Del Zanna, G., Storey, P.J., 2021, MNRAS, 505, 3968

Produced using Autostructure and including level energy corrections based on NIST for all levels
except 36. Correcting the last level affected A-values adversely.
 
Formatted for the CHIANTI database by R.P. Dufresne on Tue Nov 24 13:28:18 2020

 -1

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.

 

Theoretical data from: Tachiev G. I., Froese Fischer C., 2002, A&A, 385, 716,
 supplemented by data from ATSP2K and Autostructure calculations produced for 
 Dufresne, R.P., Del Zanna, G., Storey, P.J., 2021, MNRAS, 505, 3968

 Autostructure included level energy corrections based on NIST for all levels
 except 36. Correcting the last level affected A-values adversely.
 
 Used gf and A values for 36 -> 1,2,3,4,5 from AS because they better match Sandlin et al (1986) observed intensity ratios.

Formatted for the CHIANTI database by R.P. Dufresne on Tue Dec 22 17:33:39 2020

%File processed with wgfa_tidy by pryoung on 15-Oct-2024

si_1.scups (electron collision data)

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

 

Formatted for the CHIANTI database by R.P. Dufresne on Tue Nov 24 13:28:18 2020                 
                                                                                                
except 36. Correcting the last level affected A-values adversely.                               
Produced using Autostructure and including level energy corrections based on NIST for all levels

Excitation data from: Dufresne, R.P., Del Zanna, G., Storey, P.J., 2021, MNRAS, 505, 3968

(proton collisional data) Not available in this VERSION.

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

si_1_table.html (html table)