Fermium-257

• α→Californium-25399.79%
• SF0.21%

Decay chain

1. FmFermium-257Z 100 · N 157100.5 d
2. α99.79%
   CfCalifornium-253Z 98 · N 15517.81 d
3. β⁻99.69%
   EsEinsteinium-253Z 99 · N 15420.47 d
4. α~100%
   BkBerkelium-249Z 97 · N 152327.2 d
5. β⁻~100%
   CfCalifornium-249Z 98 · N 151351.0 y
6. α~100%
   CmCurium-245Z 96 · N 1498.25 ky
7. α~100%
   PuPlutonium-241Z 94 · N 14714.33 y
8. β⁻~100%
   AmAmericium-241Z 95 · N 146432.6 y
9. α~100%
   NpNeptunium-237Z 93 · N 1442.14 My
10. α~100%
    PaProtactinium-233Z 91 · N 14226.98 d
11. β⁻100%
    UUranium-233Z 92 · N 141159.19 ky
12. α~100%
    ThThorium-229Z 90 · N 1397.92 ky
13. α100%
    RaRadium-225Z 88 · N 13714.82 d
14. β⁻100%
    AcActinium-225Z 89 · N 1369.92 d
15. α~100%
    FrFrancium-221Z 87 · N 1344.8 m
16. α~100%
    AtAstatine-217Z 85 · N 13232.6 ms
17. α99.992%
    BiBismuth-213Z 83 · N 13045.6 m
18. β⁻97.91%
    PoPolonium-213Z 84 · N 1293.71 µs
19. α100%
    PbLead-209Z 82 · N 1273.24 h
20. β⁻100%
    BiBismuth-209Z 83 · N 12620.1 Ey
21. α100%
    TlThallium-205Z 81 · N 124Stable