| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 396 | DD | ARRANGEMENTS FOR CONVERTING CHEMICAL ELEMENTS BY ELECTROMAGNETIC RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT (e.g., producing radioactive isotopes) [G21G-1/00] {2} |
| DIG 398 | DD | .~ Outside of nuclear reactors or particle accelerators [G21G-1/04] {3} |
| DIG 399 | DD | .~.~ By neutron irradiation [G21G-1/06] {1} |
| DIG 400 | | .~.~.~ Accompanied by nuclear fission [G21G-1/08] |