Al XII - VERSION 11.0.1

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

al_12.elvlc (energy levels)

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

 
%filename:  al_12.elvlc

Theoretical 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 energy levels:  Martin, W. C., Sugar, J., Musgrove, A., and Dalton, G. R., 1995,
     NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.

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, NIST, 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 20

al_12 IP ev =  2.08598e+03 Ip invcm =    16824529.000 Ip Ryd =     153.31638
al_13 IP ev =  2.30414e+03 Ip invcm =    18584144.000 Ip Ryd =     169.35118

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:  al_12.wgfa.olg.imp
Theoretical 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 energy levels:  Martin, W. C., Sugar, J., Musgrove, A., and Dalton, G. R., 1995,
     NIST Database for Atomic Spectroscopy, Version 1.0, NIST Standard Reference Database 61.

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, NIST, 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 = al_12.elvlc
 wgfaName = al_12.wgfa-srt
 allWvl =   1
 minDiff =      0.00010
 outfile = al_12.wgfa.olg.imp

 produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy
 K. Dere (GMU) - 2020 June 20
%File processed with wgfa_tidy by pryoung on 31-May-2023

al_12.scups (electron collision data)

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

 
K. Dere (GMU) - 2020 March 22                                                                                                                                   
produced as a part of the 'CHIANTI' atomic database for astrophysical spectroscopy                                                                              

collision strengths provided in the range   2.88e+04 to   2.88e+08 K                                                                                            

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: al_12.scups

(proton collisional data) Not available in this VERSION.

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

al_12_table.html (html table)