| E(keV) | Intensity | Nuclide |
|---|---|---|
| 405.0( 1) | 5.211 | Nd-139 (EC 29.7 M) |
| 405( 2) | 8.400e-02 | Fm-253 (A 3.00 D) |
| 405.6( 1) | 0.973 | Fm-251 (EC 5.30 H) |
| 405.75( 6) | 9.742 | Po-207 (EC 5.80 H) |
| 406.0 | 93. | Ho-158m (EC 21.3 M) |
| 406.5( 1) | 2.755 | Eu-150m (EC 12.8 H) |
| 406.5( 2) | 13.858 | Kr-76 (EC 14.8 H) |
| 407.0( 1) | 0.191 | Cf-247 (EC 3.11 H) |
| 407.338( 3) | 42.1 | Er-172 (B- 49.3 H) |
| 407.351(15) | 27.858 | Sb-116m (EC 60.3 M) |
| 407.63( 4) | 41.946 | Hg-193m (EC 11.8 H) |
| 407.8( 3) | 144. | Cf-252 (SF 2.645 Y) |
| 407.9( 2) | 5.9 | Os-196 (B- 34.9 M) |
| 407.99( 2) | 0.358 | Xe-135 (B- 9.14 H) |
| 408.32( 4) | 48.545 | Rn-209 (EC 28.5 M) |
| 408.4 | 66. | Cf-252,Cm-248 (SF) |
| 409 | 3.534e-03 | Pt-197m (B- 95.41 M) |
| 409.1( 1) | 9.146e-03 | Hg-197m (EC 23.8 H) |
| 409.2( 1) | 24.24 | Pr-134 (EC 17 M) |
| 409.44( 2) | 8.766 | Pt-191 (EC 2.802 D) |
| 409.45( 2) | 9.994 | Pa-228 (EC 22 H) |
| 409.5( 3) | 0.339 | Y-85 (B+ 2.68 H) |
| 409.6 | 100. | Cf-252 (SF 2.645 Y) |