fertile

in radioanalytical chemistry
https://doi.org/10.1351/goldbook.F02350
  1. (of a @N04257@) Capable of being transformed, directly or indirectly, into a fissile nuclide by neutron capture
  2. (of a material) Containing one or more fertile nuclides.
Source:
PAC, 1982, 54, 1533. 'Glossary of terms used in nuclear analytical chemistry (Provisional)' on page 1542 (https://doi.org/10.1351/pac198254081533)