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= 11 lower level upper level lambda(A) Qd(1/s) Ar(1/s) Aa(1/s) Branching-ratio 1s2p 3P 1.0 2p2p 1S .0 9.9905 2.21E+08 3.92E+08 1.71E+13 1.29E-05 1s2s 3S 1.0 2s2p 1P 1.0 10.028 8.98E+09 3.13E+09 2.03E+14 1.48E-05 1s2p 1P 1.0 2p2p 1S .0 10.056 7.48E+12 1.33E+13 1.71E+13 4.37E-01 1s2s 1S .0 2s2p 1P 1.0 10.121 2.55E+13 8.85E+12 2.03E+14 4.19E-02 1s2p 3P 1.0 2p2p 1D 2.0 10.126 5.47E+08 1.14E+08 3.72E+14 2.94E-07 1s2p 3P 2.0 2p2p 1D 2.0 10.129 2.20E+11 4.61E+10 3.72E+14 1.18E-04 1s2s 3S 1.0 2s2p 3P 2.0 10.155 2.63E+13 8.57E+12 1.36E+13 3.86E-01 1s2s 3S 1.0 2s2p 3P 1.0 10.158 1.58E+13 8.55E+12 1.37E+13 3.84E-01 1s2s 3S 1.0 2s2p 3P .0 10.160 5.26E+12 8.55E+12 1.36E+13 3.85E-01 1s2p 3P 1.0 2p2p 3P 2.0 10.167 1.54E+12 4.31E+12 1.32E+12 2.33E-01 1s2p 3P 2.0 2p2p 3P 2.0 10.170 4.58E+12 1.28E+13 1.32E+12 6.94E-01 1s2p 3P 1.0 2p2p 3P .0 10.172 9.25E+10 1.71E+13 9.31E+10 9.94E-01 1s2p 1P 1.0 2p2p 1D 2.0 10.193 8.21E+13 1.72E+13 3.72E+14 4.41E-02 1s2p 1P 1.0 2p2p 3P 2.0 10.235 1.15E+10 3.22E+10 1.32E+12 1.74E-03 1s2p 1P 1.0 2p2p 3P .0 10.239 4.49E+07 8.32E+09 9.31E+10 4.83E-04 1s2s 1S .0 2s2p 3P 1.0 10.255 5.53E+09 2.99E+09 1.37E+13 1.34E-04 1s2p 3P 1.0 2s2p 1S .0 10.275 2.22E+10 2.24E+10 3.44E+14 6.43E-05 1s2p 1P 1.0 2s2p 1S .0 10.344 3.54E+12 3.57E+12 3.44E+14 1.03E-02