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= 27 lower level upper level lambda(A) Qd(1/s) Ar(1/s) Aa(1/s) Branching-ratio 1s2p 3P 1.0 2p2p 1S .0 1.6440 1.72E+10 2.64E+11 4.12E+13 4.16E-04 1s2s 3S 1.0 2s2p 1P 1.0 1.6484 1.63E+13 1.49E+13 1.94E+14 2.80E-02 1s2p 3P 1.0 2p2p 1D 2.0 1.6518 1.07E+12 8.07E+11 2.40E+14 8.87E-04 1s2p 1P 1.0 2p2p 1S .0 1.6519 3.85E+13 5.92E+14 4.12E+13 9.35E-01 1s2s 1S .0 2s2p 1P 1.0 1.6556 3.54E+14 3.23E+14 1.94E+14 6.07E-01 1s2p 3P 2.0 2p2p 1D 2.0 1.6556 2.37E+14 1.80E+14 2.40E+14 1.97E-01 1s2s 3S 1.0 2s2p 3P 2.0 1.6563 6.55E+13 3.35E+14 1.36E+13 9.61E-01 1s2p 3P 1.0 2p2p 3P 2.0 1.6570 1.79E+14 2.15E+14 1.33E+14 2.69E-01 1s2p 1P 1.0 2p2p 1D 2.0 1.6598 6.47E+14 4.90E+14 2.40E+14 5.38E-01 1s2s 3S 1.0 2s2p 3P 1.0 1.6604 5.90E+13 3.18E+14 2.19E+13 8.97E-01 1s2p 3P 2.0 2p2p 3P 2.0 1.6609 2.67E+14 3.21E+14 1.33E+14 4.01E-01 1s2p 3P 1.0 2p2p 3P .0 1.6612 3.67E+12 5.99E+14 3.75E+12 9.77E-01 1s2s 3S 1.0 2s2p 3P .0 1.6616 1.31E+13 3.31E+14 1.36E+13 9.60E-01 1s2p 1P 1.0 2p2p 3P 2.0 1.6650 1.09E+14 1.30E+14 1.33E+14 1.63E-01 1s2s 1S .0 2s2p 3P 1.0 1.6678 2.71E+12 1.45E+13 2.19E+13 4.11E-02 1s2p 1P 1.0 2p2p 3P .0 1.6693 6.35E+10 1.04E+13 3.75E+12 1.69E-02 1s2p 3P 1.0 2p2p 1S .0 1.6697 4.57E+13 6.39E+13 3.17E+14 1.44E-01 1s2p 1P 1.0 2p2p 1S .0 1.6778 4.47E+13 6.26E+13 3.17E+14 1.41E-01