N VI - VERSION 10.0.2


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

  1. n_6.elvlc (energy levels)
  2. contains the energy levels (in cm-1). It includes both experimental and theoretical values of the levels energies.

     
    %filename:  n_6.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
    
    Yerokhin, V. A.; Surzhykov, A.
    Theoretical Energy Levels of 1sns and 1snp States of Helium-Like Ions
    Journal of Physical and Chemical Reference Data, Volume 48, Issue 3, id.033104 (2019)
    ADSref:  https://ui.adsabs.harvard.edu/abs/2019JPCRD..48c3104Y/abstract
    
    Observed energies of bound levels:
    Observed energy levels:  Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2018).
    NIST Atomic Spectra Database (ver. 5.0), [Online]. Available: http://physics.nist.gov/asd [Tue Feb 20 2018].
    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
    
    theoretical energy levels adjusted by SHFTIC file derived from 
    Yerokhin, 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 13
     
    

  3. n_6.wgfa (radiative data)
  4. 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:  n_6.wgfa
    
    heoretical 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 (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 energies of bound levels:
    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, March 2]. 
    National Institute of Standards and Technology, Gaithersburg, MD. DOI: https://doi.org/10.18434/T4W30F
    taken from R. L. Kelly, J. Phys. Chem. Ref. Data 16, Suppl. 1, 1–1698 (1987); Erratum: 17, 953 (1998) 
    
    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 
    Artemyev, 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 
     
     wavelengths determined from energy levels
    
      minimum branching ratio =   1.00e-04
    sorted by lvl12
    elvlcName = n_6.elvlc
     wgfaName = n_6.wgfa-srt
     allWvl =   1
     minDiff =      0.00010
     outfile = n_6.wgfa.olg.imp
    produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
     K. Dere (GMU) - 2020 June 13
    

  5. n_6.scups (electron collision data)
  6. contains the effective electron collision strengths scaled according to the rules formulated by Burgess and Tully (1992).

     
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    K. Dere (GMU) - 2020 March 11
    produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
    collision strengths provided in the range   7.20e+03 to   7.20e+07 K
    K. Dere (GMU) - 2020 March 11
    produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
    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: n_6.ups
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    

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

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

    n_6_table.html (html table)

    Page created by Giulio Del Zanna on Wed Jun 8 16:09:12 2022