X-ray line energies

M L K
Siegbahn Mα Mβ Lι Lα1 Lβ1 Lβ2 Lγ1 L abs Kα1,2 Kβ K abs
IUPAC M5–N6,7 M4–N6 L3–M1 L3–M5 L2–M4 L3–N5 L2–N4 L1 K–L2,3 K–M3 K
From... 4f5/2,7/2 4f5/2 3s 3d5/2 3d3/2 4d5/2 4d3/2 2p 3p3/2
...to 3d5/2 3d3/2 2p3/2 2p3/2 2p1/2 2p3/2 2p1/2 2s 1s 1s 1s
Intensity     20-5 ~90 ~50 ~5 ~5 100 ~20
Element                      
1 H
2 He
3 Li 0.054
4 Be 0.109 0.112
5 B 0.183 0.192
6 C 0.277 0.284
7 N 0.392 0.400
8 O 0.525 0.532
9 F 0.677 0.687
10 Ne 0.849 0.867
11 Na 1.041 1.067 1.072
12 Mg 1.254 1.296 1.303
13 Al 1.487 1.553 1.560
14 Si 1.740 1.829 1.840
15 P 2.013 2.136 2.143
16 S 2.307 2.464 2.470
17 Cl 0.183 2.622 2.816 2.820
18 Ar 0.220 2.957 3.190 3.203
19 K 0.260 3.313 3.590 3.608
20 Ca 0.303 0.341 0.345 3.690 4.013 4.038
21 Sc 0.348 0.395 0.400 4.089 4.460 4.489
22 Ti 0.395 0.452 0.458 4.509 4.932 4.965
23 V 0.446 0.511 0.519 4.950 5.427 5.464
24 Cr 0.500 0.573 0.583 5.412 5.947 5.989
25 Mn 0.556 0.637 0.649 5.895 6.490 6.538
26 Fe 0.615 0.705 0.718 6.399 7.058 7.111
27 Co 0.678 0.776 0.791 6.925 7.649 7.709
28 Ni 0.743 0.851 0.869 7.472 8.265 8.331
29 Cu 0.811 0.930 0.950 8.041 8.905 8.980
30 Zn 0.884 1.012 1.035 1.198 8.631 9.572 9.660
31 Ga 0.957 1.098 1.125 1.303 9.243 10.264 10.368
32 Ge 1.036 1.188 1.218 1.413 9.876 10.982 11.103
33 As 1.120 1.282 1.317 1.529 10.532 11.721 11.864
34 Se 1.204 1.379 1.419 1.652 11.209 12.495 12.655
35 Br 1.293 1.480 1.526 1.782 11.909 13.291 13.470
36 Kr 1.393 1.586 1.636 1.916 12.633 14.113 14.325
37 Rb 1.482 1.694 1.752 2.064 13.376 14.961 15.203
38 Sr 1.582 1.807 1.872 2.217 14.143 15.836 16.108
39 Y 1.685 1.923 1.996 2.376 14.934 16.738 17.037
40 Zr 1.792 2.042 2.124 2.219 2.303 2.541 15.747 17.669 17.999
41 Nb 1.902 2.166 2.257 2.367 2.462 2.710 16.584 18.621 18.986
42 Mo 2.016 2.293 2.395 2.518 2.623 2.881 17.445 19.608 20.003
43 Tc 2.132 2.424 2.537 2.663 2.792 3.055 18.329 20.619 21.046
44 Ru 2.253 2.559 2.683 2.836 2.964 3.233 19.237 21.656 22.120
45 Rh 2.377 2.697 2.834 3.001 3.144 3.416 20.169 22.724 23.217
46 Pd 2.503 2.839 2.990 3.172 3.329 3.607 21.028 23.819 24.348
47 Ag 2.634 2.984 3.151 3.348 3.520 3.807 22.104 24.941 25.516
48 Cd 2.767 3.134 3.317 3.528 3.717 4.019 23.109 26.096 26.714
49 In 2.904 3.287 3.487 3.714 3.921 4.237 24.139 27.278 27.942
50 Sn 3.045 3.444 3.663 3.905 4.131 4.465 25.194 28.488 29.192
51 Sb 3.189 3.605 3.844 4.101 4.348 4.698 26.278 29.724 30.484
52 Te 3.335 3.769 4.030 4.302 4.571 4.940 27.381 30.941
53 I 3.485 3.938 4.221 4.508 4.801 5.192 28.514
54 Xe 3.640 4.110 4.423 4.743 5.037 5.453 29.674
55 Cs 3.795 4.286 4.620 4.936 5.280 5.720 30.856
56 Ba 3.954 4.466 4.828 5.156 5.531 5.996
57 La 0.833 0.854 4.124 4.651 5.042 5.383 5.789 6.268
58 Ce 0.883 0.902 4.287 4.840 5.262 5.613 6.052 6.548
59 Pr 0.929 0.949 4.453 5.034 5.489 5.850 6.322 6.834
60 Nd 0.978 0.997 4.633 5.230 5.722 6.089 6.602 7.129
61 Pm 1.025 1.044 4.810 5.432 5.961 6.339 6.892 7.436
62 Sm 1.081 1.100 4.995 5.636 6.205 6.587 7.178 7.748
63 Eu 1.131 1.153 5.177 5.846 6.456 6.843 7.480 8.061
64 Gd 1.185 1.209 5.362 6.057 6.713 7.103 7.786 8.386
65 Tb 1.240 1.266 5.547 6.273 6.978 7.367 8.102 8.717
66 Dy 1.293 1.325 5.743 6.495 7.248 7.636 8.419 9.055
67 Ho 1.348 1.383 5.943 6.720 7.525 7.911 8.747 9.400
68 Er 1.406 1.443 6.153 6.948 7.811 8.189 9.089 9.758
69 Tm 1.462 1.503 6.342 7.180 8.101 8.469 9.426 10.121
70 Yb 1.521 1.568 6.545 7.416 8.402 8.759 9.780 10.491
71 Lu 1.581 1.631 6.753 7.655 8.709 9.049 10.143 10.874
72 Hf 1.645 1.698 6.959 7.899 9.023 9.347 10.516 11.274
73 Ta 1.710 1.765 7.173 8.146 9.343 9.652 10.896 11.682
74 W 1.775 1.835 7.388 8.397 9.672 9.961 11.285 12.099
75 Re 1.842 1.906 7.603 8.652 10.010 10.275 11.685 12.531
76 Os 1.914 1.978 7.822 8.912 10.355 10.598 12.096 12.971
77 Ir 1.980 2.053 8.041 9.175 10.708 10.920 12.512 13.424
78 Pt 2.050 2.127 8.268 9.442 11.071 11.250 12.942 13.882
79 Au 2.123 2.204 8.494 9.713 11.443 11.585 13.382 14.353
80 Hg 2.195 2.282 8.721 9.989 11.822 11.923 13.831 14.843
81 Tl 2.271 2.362 8.953 10.268 12.214 12.272 14.289 15.342
82 Pb 2.345 2.442 9.184 10.551 12.614 12.623 14.765 15.854
83 Bi 2.422 2.526 9.420 10.838 13.023 12.980 15.248 16.376
84 Po 2.501 2.612 9.664 11.130 13.447 13.340 15.743 17.058
85 At 2.580 2.696 9.876 11.427 13.876 13.712 16.251 17.608
86 Rn 2.660 2.781 10.118 11.727 14.316 14.085 16.770 18.168
87 Fr 2.742 2.868 10.363 12.031 14.770 14.450 17.304 18.737
88 Ra 2.825 2.956 10.622 12.340 15.235 14.841 17.849 19.237
89 Ac 2.910 3.046 10.862 12.652 15.716 15.233 18.408 19.897
90 Th 2.996 3.146 11.118 12.969 16.202 15.624 18.983 20.462
91 Pa 3.083 3.240 11.366 13.291 16.702 16.024 19.568 21.171
92 U 3.171 3.336 11.618 13.615 17.219 16.428 20.166 21.770
93 Np 3.259 3.432 11.889 13.944 17.749 16.840 20.785 22.432
94 Pu 3.347 3.531 12.124 14.276 18.294 17.255 21.416 23.109
95 Am 14.617 18.852 17.677 22.065
                     
Intensity     20-5 ~90 ~50 ~5 ~5 100 ~20
IUPAC M5–N6,7 M4–N6 L3–M1 L3–M5 L2–M4 L3–N5 L2–N4 L1 K–L2,3 K–M3 K
Siegbahn Mα Mβ Lι Lα1 Lβ1 Lβ2 Lγ1 L abs Kα1,2 Kβ K abs
M L K

For more X-ray lines see the table from Kaye and Laby (source, Kaye and Laby 4.2.1 X-ray absorption edges, characteristic X-ray lines and fluorescence yields, not updated since 2017)

Dr Chris Boothroyd | Information