Table /. Mass absorption coefficients (in cmag") of selected chemical elements for the commonly used anode materials. Anode Cr Fe Cu Mo Ka Element KB Ka KB Ka KB Ka KB H 0.412 0.405 0.400 0.396 0.391 0.388 0.373 He 0.370 0.498 0.425 0.381 0.335 0.292 0.268 0.202 0.197 15.0 11.2 8.99 6.68 4.51 3.33 0.576 N 0.458 24.7 18.6 14.9 11.0 7.44 5.48 0.845 O 0.645 37.8 28.4 22.8 17.0 11.5 8.42 1.22 0.908 . . . 516 403 332 256 180 137 20.8 14.9 Ti 590 444 358 277 200 152 23.4 V 16.8 96.5 479 399 309 219 166 26 Cr 18.7 86.8 67.0 492 385 247 185 29.9 Mn 21.5 97.5 75.3 61.6 375 270 207 33.1 23.8 Fe 113 86.9 71.0 54.3 302 232 37.6 Co 27.1 124 96.0 78.5 60.0 321 248 41.0 Ni 144 29.6 112 91.3 69.8 48.8 279 46.9 Cu 34.0 153 118 96.8 74.0 51.8 39.2 49.1 35.7 Sr 328 256 210 161 113 85.9 90.6 Y 358 67.2 279 229 176 124 94.0 97.0 Zr 72.1 386 300 247 191 139 101 16.3 Nb 76.1 416 325 267 205 145 110 17.7 Mo 81.0 442 345 284 219 154 117 18.8 13.8