German Spent Nuclear Fuel Legacy: Characteristics and High-Level Waste Management Issues

Table 4

Half-lives and principal radiations of most important Cm, Np, and Am isotopes.

Isotope	Np-237	Am-241	Am-243	Cm-243	Cm-244	Cm-245
Half-life (yr)	2,144,000	432.5	7,390	29.1	18.1	8,600
Radiations	α, γ	α, 𝑛	α, γ, 𝑛	α, γ, 𝑛	α, γ, 𝑛	α