Assertion: neptunium's isotope | /r/HasProperty | fissile
Facets:
value: with both thermal and fast neutrons
type: OTHER
Source sentences:
text: Uranium-232 is a rare example of an even-even isotope that is fissile with both thermal and fast neutrons.
text: In contrast to plutonium and later actinide samples, where radiolysis effects are often visually apparent after days to weeks, the degradation ofNp complexes due to autoradiolysis is insignificant over a time scale of many months, and although theNp isotope is fissile, the mass required to achieve criticality is 63.6 kg, so it is not a practical concern.