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Atomic K series L series 
Num- 
ber Element Kav KB. KB, Kai Kaz Liab Lita») Littan Lyi LB: LB, Lai Laz 
ree eee 
31 Gallium 10.368 10.365 10.263 9.251 9.234 1.30* 1.134** 1.117** 1.122 1.096 
32 Germanium 11.103 11.100 10.981 9.885 9.854 1.42* 1.248** 1.217** 1.216 1.186 
33 Arsenic 11.863 11.863 11.725 10.543 10.507 1.529 1.359 1.323 1.317 1.282 
34 Selenium 12.652 12.651 12.495 11.221 11.181 1.652 1.473 1.434 1.419 1.379 
35 Bromine 13.475 13.465 13.290 11.923 11.877 1.794§ 1.599** 1.552** 1.526 1.480 
36 Krypton 14.323 14.313 14.112 12.648 12.597 1.931§ 1.727** 1.675** 1.638§ 1.587** 
37 Rubidium 15.201 15.184 14.960 13.394 13.335 2.067 1.866 1.806 1.752 1.694 1.692 
38 Strontium 16.106 16.083 15.834 14.164 14.097 2.221 2.008 1.941 1.872 1.806 1.805 
39 Yttrium 17.037 17.011 16.736 14.957 14.882 2.369 2.154 2.079 1.996 1.922 1.920 
40 Zirconium 17.998 17.969 17.666 15.774 15.690 2.547 2.305 2.220 2.302 2.219 2.124 2.042 2.040 
41 Niobium 18.987 18.951 18.621 16.614 16.520 2.706 2.467** 2.374 2.462 2.367 2.257 2.166 2.163 
42 Molybdenum 20.002 19.964 19.607 17.478 17.373 2.884 2.627 2.523 2.623 2.518 2.395 2.293 2.290 
43 Technetium 21.054§ 21.012§ —20.585] 18.4104 18.328] 3.054§ 2.795§ 2.677§ 2.792§ 2.674§ 2.538§ 2.424§ 2.4208 
44 Ruthenium 22.118 22.072 21.655 19.278 19.149 3.236§ 2.966 2.837 2.964 2.836 2.683 2.558 2.554 
45 Rhodium 23.224 23.169 22.721 20.214 20.072 3.419 3.145 3.002 3.144 3.001 2.834 2.696 2.692 
46 Palladium 24.347 24.297 23.816 21.175 21.018 3.617 3.329 3.172 3.328 3.172 2.990 2.838 2.833 
47 Silver 25.517 25.454 24.942 22.162 21.988 3.810 3.528 3.352 3.519 3.348 3.151 2.984 2.978 
48 Cadmium 26.712 26.641 26.093 23.172 22.982 4.019 3.727 3.5388 3.716 3.528 3.316 3.133 3.127 
49 Indium 27.928 27.859 27.274 24.207 24.000 4.237 3.939 3.729 3.920 3.713 3.487 3.287 3.279 
50 Tin 29.190 29.106 28.483 25.270 25.042 4.464 4.157 3.928 4.131 3.904 3.662 3.444 3.435 
51 Antimony 30.486 30.387 29.723 26.357 26.109 4.697 4.381 4.132 4.347 4.100 3.843 3.605 3.595 
52 Tellurium 31.809 31.698 30.993 27.471 27.200 4.938 4.613 4.341 4.570 4.301 4.029 3.769 3.758 
53 Iodine 33.164 33.016 32.292 28.610 28.315 5.190 4.856 4.559 4.800 4.507 4.220 3.937 3.926 
54 Xenon 34.579 34.4469 33.644 29.8024 29.4859 5.452 5.104 4.782 5.036§ 4.720§ 4.422§ 4.111§ 4.098§ 
55 Cesium 35.959 35.819 34.984 30.970 30.623 5.720 5.358 5.011 5.280 4.936 4.620 4.286 4.272 
56 Barium 37.410 37.255 36.376 32.191 31.815 5.995 5.623 5.247 5.531 5.156 4.828 4.467 4.451 
57 Lanthanum 38.931 38.728 37.799 33.440 33.033 6.283 5.894 5.489 5.789 5.384 5.043 4.651 4.635 
58 Cerium 40.449 40.231 39.255 34.717 34.276 6.561 6.165¢ 5.729 6.052 5.613 5.262 4.840 4.823 
59 Praseodymium 41.998 41.772 40.746 36.023 35.548 6.846 6.443 5.968 6.322 5.850 5.489 5.034 5.014 
60 Neodymium 43.571 43.2989 42.269 37.359 36.845 7.144 6.727 6.215 6.602 6.090 5.722 5.230 5.208 
61 Promethium 45.207§ 44.955§ —43.945] 38.6499 38.1609 7.448§ 7.018§ 6.466§ 6.891§ 6.336§ 5.956 5.431 5.408§ 
62 Samarium 46.846 46.5539 45.400 40.124 39.523 7.754 7.2819, 6.721 7.180 6.587 6.206 5.636 5.609 
63 Europium 48.515 48.241 47.027 41.529 40.877 8.069 7.624 6.983 7.478 6.842 6.456 5.846 5.816 
64 Gadolinium 50.229 49.961 48.718 42.983 42.280 8.393 7.940 7.252 7.788 7.102 6.714 6.059 6.027 
65 Terbium 51.998 51.737 50.391 44.470 43.737 8.724 8.258 7.519 8.104 7.368 6.979 6.275 6.241 
66 Dysprosium 53.789 53.491 52.178 45.985 45.193 9.083 8.6219 7.8509 8.418 7.638 7.249 6.495 6.457 
67 Holmium 55.615 55.292** 53.934§ 47.528 46.686 9.411 8.920 8.074 8.748 7.912 7.528 6.720 6.680 
68 Erbium 57.483 57.088 55.690 49.099 48.205 9.776 9.263 8.364 9.089 8.188 7.810 6.948 6.904 
69 Thulium 59.3359 58.969** 57.5769 50.730 49.762 10.144 9.628 8.652 9.424 8.472 8.103 7.181 7.135 
70 Ytterbium 61.303 60.959 59.352 52.360 51.326 10.486 9.977 8.943 9.779 8.758 8.401 7.414 7.367 
71 + Lutecium 63.304 62.946 61.282 54.063 52.959 10.867 10.345 9.241 10.142 9.048 8.708 7.654 7.604 
72 Hafnium 65.313 64.936 63.209 55.757 54.579 11.264 10.734 9.556 10.514 9.346 9.021 7.898 7.843 
73 Tantalum 67.400 66.999 65.210 57.524 56.270 11.676 11.130 9.876 10.892 9.649 9.341 8.145 8.087 
74 Tungsten 69.508 69.090 67.233 59.310 57.973 12.090 11.535 10.198 11.283 9.959 9.670 8.396 8.333 
75 Rhenium 71.662 71.220 69.298 61.131 59.707 12.522 11.955 10.531 11.684 10.273 10.008 8.651 8.584 
76 Osmium 73.860 73.393 71.404 62.991 61.477 12.965 12.383 10.869 12.094 10.596 10.354 8.910 8.840 
77°~=~=Iridium 76.097 75.605 73.549 64.886 63.278 13.413 12.819 11.211 12.509 10.918 10.706 9.173 9.098 
78 Platinum 78.379 77.866 75.736 66.820 65.111 13.873 13.268 11.559 12.939 11.249 11.069 9.441 9.360 
79 Gold 80.713 80.165 77.968 68.794 66.980 14.353 13.733 11.919 13.379 11.582 11.439 9.711 9.625 
80 Mercury 83.106 82.526 80.258 70.821 68.894 14.841 14.212 12.285 13.828 11.923 11.823 9.987 9.896 
81 ‘Thallium 85.517 84.904 82.558 72.860 70.820 15.346 14.697 12.657 14.288 12.268 12.210 10.266 10.170 
82 Lead 88.001 87.343 84.922 74.957 72.794 15.870 15.207 13.044 14.762 12.620 12.611 10.549 10.448 
83 Bismuth 90.521 89.833 87.335 77.097 74.805 16.393 15.716 13.424 15.244 12.977 13.021 10.836 10.729 
84 Polonium 93.112 92.386 89.809 79.296 76.868 16.935 16.244 13.817 15.740 13.338 13.441 11.128 11.014 
85 Astatine 95.740 94.976 92.319 81.525 78.956 17.490 16.784 14.215 16.248 13.705 13.873 11.424 11.304 
86 Radon 98.418 97.616 94.877 83.800 81.080 18.058 17.337 14.618 16.768 14.077. 14.316 11.724 11.597 
87 Francium 101.147 100.305 97.483 86.119 83.243 18.638 17.904 15.028 17.301 14.459 14.770 12.029 11.894 
88 Radium 103.927 103.048 100.136 88.485 85.446 19.233 18.481 15.442 17.845 14.839 15.233 12.338 12. 194 
89 Actinium 106.759 105.838 102.846 90.894 87.681 19.842 19.078 15.865 18.405 15.227 15.712 12.650 12.499 
90 Thorium 109.630 108.671 105.592 93.334 89.942 20.460 19.688 16.296 18.977 15.620 16.200 12.966 12.808 
91 Protactinium 112.581 111.575 108.408 95.851 92.271 21.102 20.311 16.731 19.559 16.022 16.700 13.291 13.120 
92 Uranium 115.591 114.549 111.289 98.428 94.648 21.753 20.943 17.163 20.163 16.425 17.218 13.613 13.438 
93 Neptunium 118.619 117.533 114.181 101.005 97.023 22.417 21.596 17.614 20.774 16.837 17.740 13.945 13.758 
94 Plutonium 121.720 120.592 117.146 103.653 99.457 23.097 22.262 18.066 21.401 17.254 18.278 14.279 14.082 
95 Americium 124.876 123.706 120.163 106.351 101.932 23.793 22.944 18.525 22.042 17.677 18.829 14.618 14.411 
96 Curium 128.088 126.875 123.235 109.098 104.448 24.503 23.640 18.990 22.699 18.106 19.393 14.961 14.743 
97 Berkelium 131.357 130.101 126.362 111.896 107.023 25.230 24.352 19.461 23.370 18.540 19.971 15.309 15.079 
98 Californium 134.683 133.383 129.544 114.745 109.603 25.971 25.080 19.938 24.056 18.980 20.562 15.661 15.420 
99 138.067 136.724 132.781 117.646 112.244 26.729 25.824 20.422 24.758 19.426 21.166 16.018 15.764 
100 141.510 140.122 136.075 120.598 144.926 27.503 26.584 20.912 25.475 19.879 21.785 16.379 16.113 
For Z < 69, values without symbols are derived from (1). Values prefixed with a — sign are KBi4s. 
For Z > 70, absorption-edge values are from (4) in the case of Z = 70-83, 88, 90, and 92; remaining absorption edges to Z = 100 are obtained from these 
by least-squares quadratic fitting. All emission values for Z > 70 are derived from the preceding absorption edges, and others based on (4), using the transi- 
tion relations Kai = Kab — Ly11, Kaz = Kab — Lyy, KB: = Kab — Mj11, etc. 
* Obtained from R. D. Hill, E. L. Church, J. W. Mihelich (6). + Derived from Compton and Allison (2). t Derived from C. E. Moore (3). 
J Values derived from Cauchois and Hulubei (1) which deviate from the Moseley law. Better-fitting values are: Z = 17, Kab = 2.826; Z = 43, 
Ka = 18.370, Kaz = 18.250, KBi = 20.612; Z = 54, Ka: = 29.779, Kaz = 29.463, KB: = 34.398; Z = 60, Kf2 = 43.349; Z = 61, Kai = 38.726, Ka: = 
38.180, KB: = 43.811; Z = 62, KB: = 46.581, Lyy = 7.312; Z = 66, Lyy = 8.591, Lyyy = 7.790; Z = 69, Kab =: 59.382, KB: = 57.487. 
§ Calculated by method of least squares. ** Calculated by transition relations. 
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