El Lya1 Lya1 Lya2 Lya2 Lyb1 Lyb1 Lyb2 Lyb2 A keV A keV A keV A keV C VI 33.734 0.3675 33.740 0.3675 28.465 0.436 28.466 0.436 N VII 24.779 0.5004 24.785 0.5002 20.909 0.593 20.911 0.593 O VIII 18.967 0.6537 18.973 0.6535 16.006 0.775 16.007 0.775 Ne X 12.132 1.0220 12.137 1.0215 10.238 1.211 10.240 1.211 Na XI 10.023 1.2370 10.029 1.2363 8.459 1.466 8.460 1.465 Mg XII 8.419 1.4726 8.425 1.4717 7.106 1.745 7.107 1.745 Al XIII 7.171 1.7290 7.176 1.7277 6.089 2.036 6.091 2.036 Si XIV 6.180 2.0061 6.186 2.0043 5.217 2.377 5.218 2.376 S XVI 4.727 2.6227 4.733 2.6197 3.991 3.107 3.992 3.106 Ar XVIII 3.731 3.3230 3.737 3.3182 3.150 3.936 3.151 3.934 Ca XX 3.018 4.1075 3.024 4.1001 2.549 4.864 2.550 4.862 Fe XXVI 1.778 6.9732 1.783 6.9520 1.502 8.252 1.504 8.246 Ni XXVIII 1.530 8.1017 1.536 8.0731 1.293 9.586 1.295 9.577