L.A. Vainshtein and U.I. Safronova 1978, ADNDT 21, 49
"Wavelengths and Transition Probabilities of Satellites to Resonance Lines of H- and He-like Ions"

   Table V

 He-like ion: Z= 12


lower level   upper level      lambda(A)  Qd(1/s)   Ar(1/s)   Aa(1/s)  Branching-ratio

1s2p  3P 1.0  2p2p  1S  .0   	  8.3937  4.22E+08  8.74E+08  1.78E+13  2.38E-05
1s2s  3S 1.0  2s2p  1P 1.0   	  8.4223  2.07E+10  7.34E+09  2.02E+14  3.41E-05
1s2p  1P 1.0  2p2p  1S  .0   	  8.4455  9.19E+12  1.90E+13  1.78E+13  5.17E-01
1s2s  1S  .0  2s2p  1P 1.0   	  8.4956  3.56E+13  1.26E+13  2.02E+14  5.85E-02
1s2p  3P 1.0  2p2p  1D 2.0   	  8.4982  1.03E+09  2.20E+08  3.71E+14  5.55E-07
1s2p  3P 2.0  2p2p  1D 2.0   	  8.5008  5.12E+11  1.09E+11  3.71E+14  2.76E-04
1s2s  3S 1.0  2s2p  3P 2.0   	  8.5208  3.22E+13  1.22E+13  1.36E+13  4.73E-01
1s2s  3S 1.0  2s2p  3P 1.0   	  8.5243  1.94E+13  1.22E+13  1.37E+13  4.70E-01
1s2s  3S 1.0  2s2p  3P  .0   	  8.5259  6.44E+12  1.22E+13  1.36E+13  4.72E-01
1s2p  3P 1.0  2p2p  3P 2.0   	  8.5301  2.54E+12  6.16E+12  2.20E+12  2.31E-01
1s2p  3P 2.0  2p2p  3P 2.0   	  8.5327  7.52E+12  1.82E+13  2.20E+12  6.84E-01
1s2p  3P 1.0  2p2p  3P  .0   	  8.5349  1.51E+11  2.44E+13  1.52E+11  9.93E-01
1s2p  1P 1.0  2p2p  1D 2.0   	  8.5513  1.15E+14  2.44E+13  3.71E+14  6.17E-02
1s2p  1P 1.0  2p2p  3P 2.0   	  8.5835  3.16E+10  7.67E+10  2.20E+12  2.87E-03
1s2p  1P 1.0  2p2p  3P  .0   	  8.5884  1.18E+08  1.91E+10  1.52E+11  7.76E-04
1s2s  1S  .0  2s2p  3P 1.0   	  8.5994  1.12E+10  7.04E+09  1.37E+13  2.71E-04
1s2p  3P 1.0  2s2p  1S  .0   	  8.6149  5.19E+10  5.27E+10  3.44E+14  1.51E-04
1s2p  1P 1.0  2s2p  1S  .0   	  8.6694  4.97E+12  5.04E+12  3.44E+14  1.45E-02