S I - VERSION 10.1

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

s_1.elvlc (energy levels)

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

 
Observed energies: 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 [2013, May 3]. National Institute of Standards and Technology, Gaithersburg, MD. 

Theoretical energies from O. Zatsarinny and K. Bartschat,  J. Phys. B: 39, 2861 (2006).

 Produced for the CHIANTI database  by Giulio Del Zanna, Jul 2016
 -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.

 

Observed energies: 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 [2013, May 3]. National Institute of Standards and Technology, Gaithersburg, MD. 


A-values from A. Irimia and C. Froese Fischer, Method: MCHF (ab initio), 2003
%File processed with wgfa_tidy by pryoung on  6-Mar-2019
%File processed with wgfa_tidy by pryoung on 31-May-2023

s_1.scups (electron collision data)

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

 
Produced for the CHIANTI database  by Giulio Del Zanna, 19 Jul 2016

becomes available.
This dataset should  be used with caution, until a new calculation

configuration. 
to singlet levels, so we are retaining only the levels of the ground 
labelling of levels 1,3.  The swap is however only accurate for transitions
(Tayal, priv. comm. 2016), so as a temporary fix we have swapped the 
was clearly inverted.  Unfortunately, the original LS calculation was lost
the JAJOM program. The labelling of the ground configuration 3s2 3p4 3P levels 
the level-resolved values were obtained with a simple algebraic transformation using
The original calculation was carried out in LS coupling, and 
are not in the expected ratio of the statistical weights of the lower levels.
The effective collision strengths to singlet levels as published by Tayal 

O. Zatsarinny and K. Bartschat,  J. Phys. B: 39, 2861 (2006).
The gf-values were not provided so have been obtained from 
Effective Collision Strengths from S.S. Tayal, 2004, ApJSS, 153, 581

(proton collisional data) Not available in this VERSION.

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

s_1_table.html (html table)