Cr VIII - VERSION 10.1

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

  1. cr_8.elvlc (energy levels)

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

     
%File prepared for the CHIANTI atomic database by Peter Young.
%File: cr_8.elvlc
%Observed energies:
    Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2019).
    NIST Atomic Spectra Database (ver. 5.7.1), [Online].
    Available: https://physics.nist.gov/asd [2020, July 27].
    National Institute of Standards and Technology, Gaithersburg, MD.
    DOI: https://doi.org/10.18434/T4W30F 
%Theoretical energies:
    Aggarwal, K.M., Kato, T., Keenan, F.P. & Murakami, I., 2009, A&A 506, 1501
%Comment:
    Theoretical energies come from the GRASP model with Breit and QED corrections, i.e., energy 
    column 3 of the authors' Table 1.

  2. cr_8.wgfa (radiative data)

    3. 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. 

     
%File prepared for the CHIANTI atomic database by Peter Young.
%File: cr_8.wgfa
%A-values:
    Aggarwal, K.M., Kato, T., Keenan, F.P. & Murakami, I., 2009, A&A 506, 1501
%Comment:
    Wavelengths are derived from energies in the elvlc file.
%File processed with wgfa_tidy by pryoung on 27-Jul-2020
%File processed with wgfa_tidy by pryoung on 31-May-2023

  3. cr_8.scups (electron collision data)

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

     
      by the ch_ion_validity routine).
    - About 200 transitions were missing in the Aggarwal data (these will be flagged
    - Metastables: 1,2,4,5,6,7,8,10,16,19,20,21,22,24,81,106.
    - Only transitions involving the metastables are retained.
    - Wavelengths are derived from energies in the elvlc file.
%Comment:
    Aggarwal, K.M., Kato, T., Keenan, F.P. & Murakami, I., 2009, A&A 506, 1501
%Upsilons:
%File prepared for the CHIANTI atomic database by Peter Young (Feb-2021).
%File created: Thu Feb  4 17:00:13 2021
%File:  cr_8.scups

  4. (proton collisional data) Not available in this VERSION.

    5. The html tables below contain the radiative data of the brightest lines sorted in wavelength

    Page created by Giulio Del Zanna on Mon Jun 26 11:15:36 2023