O II - VERSION 11.0

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

o_2.elvlc (energy levels)

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

 

Theoretical energies:

Mao, J., Badnell, N. R., Del Zanna, G., 2020, A&A, 643, A95 
"R-matrix electron-impact excitation data for the N-like iso-electronic sequence"
DOI: 10.1051/0004-6361/202039195

Note: only  bound levels have been retained.

Energies for the ground configuration are from
Blagrave, Martin, ApJ, 2004, 610, 813

Rest of the energies are either from 
Ingvar Wenaker 1990 Phys. Scr. 42 667

or

NIST Atomic Spectra Database,[Online].
https://physics.nist.gov/PhysRefData/ASD/levels_form.html

 
 -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.

 

gf-values, A-values and theoretical energies:

Mao, J., Badnell, N. R., Del Zanna, G., 2020, A&A, 643, A95 
"R-matrix electron-impact excitation data for the N-like iso-electronic sequence"
DOI: 10.1051/0004-6361/202039195

Note: only  bound levels have been retained.


For the ground configuration, values are from

Tachiev, G.I. and Froese Fischer, C., A&A, 2002,385,716
MCHF calculations
doi = 10.1051/0004-6361:20011816


One transition from Zeippen.


Note: values are close to the SS values from Zeippen:


               MCHF      SS Set A/TEC
                           Zeippen     

1-5 4S3/2 - 2P3/2  5.64e-02   5.80e-2       M1
1-4 4S3/2 - 2P1/2  2.27e-02   2.38e-2       M1

1-2 4S3/2 - 2D5/2  4.12e-5  3.588e-05   M1+E2

1-3 4S3/2 - 2D3/2  1.6e-4   1.81e-4   M1+E2

2-3 2D5/2 - 2D3/2  1.24e-7  1.32e-7    M1+E2

2-5 2D5/2 - 2P3/2   0.110     0.107      M1+E2 **
2-4 2D5/2 - 2P1/2   5.82e-2   5.63e-2    M1+E2 **

3-5 2D3/2  - 2P3/2  5.8e-2   5.8e-2     M1+E2  **
3-4 2D3/2  - 2P1/2  9.7e-2   9.4e-2     M1+E2  **

Produced as part of the 'CHIANTI' atomic data base collaboration by
Giulio Del Zanna, Mar 2023

%File processed with wgfa_tidy by pryoung on 31-May-2023

o_2.scups (electron collision data)

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

 


Giulio Del Zanna, Mar 2023                                                                       
Produced as part of the 'CHIANTI' atomic data base collaboration by                              


are from Tayal, S. S. 2007, ApJS, 171, 331, doi: 10.1086/513107591                               
The effective collision strengths up to 10^5 K for the first 5 states of the ground configuration


Note: only  bound levels have been retained.                                                     

DOI: 10.1051/0004-6361/202039195                                                                 
"R-matrix electron-impact excitation data for the N-like iso-electronic sequence"                
Mao, J., Badnell, N. R., Del Zanna, G., 2020, A&A, 643, A95                                      

oscillator strengths and effective collision strengths:

(proton collisional data) Not available in this VERSION.

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

o_2_table.html (html table)