Fermium radioactive isotope number 1: 242Fm |
| Neutrons: | 142; |
| Jn: | 0+; |
| Decay: | SF ≤ 100.00 %; |
| t1/2: | 0.0008s ≈ 0.80 ms; |
Fermium radioactive isotope number 2: 243Fm |
| Neutrons: | 143; |
| Jn: | 7/2+; |
| Decay: | α ≤ 100.00 %; |
| t1/2: | 0.18s ; |
Fermium radioactive isotope number 3: 244Fm |
| Neutrons: | 144; |
| Jn: | 0+; |
| Decay: | SF ≤ 100.00 %; |
| t1/2: | 0.0033s ≈ 3.30 ms; |
Fermium radioactive isotope number 4: 245Fm |
| Neutrons: | 145; |
| Jn: | Unknown; |
| Decay: | α ≤ 100.00 %
SF ≤ 0.10 %; |
| t1/2: | 4.2s ; |
Fermium radioactive isotope number 5: 246Fm |
| Neutrons: | 146; |
| Jn: | 0+; |
| Decay: | α : 92.00 %
SF : 8.00 %
ε ≤ 1.00 %; |
| t1/2: | 1.1s ; |
Fermium radioactive isotope number 6: 247Fm |
| Neutrons: | 147; |
| Jn: | 7/2+; |
| Decay: | ε ≤ 50.00 %
α ≥ 50.00 %; |
| t1/2: | 29s ; |
Fermium radioactive isotope number 7: 247Fm |
| Neutrons: | 147; |
| Jn: | 1/2+; |
| Decay: | α ≤ 100.00 %; |
| t1/2: | 4.3s ; |
Fermium radioactive isotope number 8: 248Fm |
| Neutrons: | 148; |
| Jn: | 0+; |
| Decay: | α : 93.00 %
ε : 7.00 %
SF : 0.10 %; |
| t1/2: | 36s ; |
Fermium radioactive isotope number 9: 249Fm |
| Neutrons: | 149; |
| Jn: | 7/2+; |
| Decay: | ε : 67.00 %
α : 33.00 %; |
| t1/2: | 156s ≈ 2.60 m; |
Fermium radioactive isotope number 10: 250Fm |
| Neutrons: | 150; |
| Jn: | 0+; |
| Decay: | α > 90.00 %
ε < 10.00 %
SF : 6.9E-3 %; |
| t1/2: | 1800s ≈ 30.00 m; |
Fermium radioactive isotope number 11: 250Fm |
| Neutrons: | 150; |
| Jn: | 0+; |
| Decay: | IT ≥ 80.00 %
α < 20.00 %
SF ≤ 8.2E-5 %
ε; |
| t1/2: | 1.8s ; |
Fermium radioactive isotope number 12: 251Fm |
| Neutrons: | 151; |
| Jn: | 9/2-; |
| Decay: | ε : 98.20 %
α : 1.80 %; |
| t1/2: | 19080s ≈ 5.30 h; |
Fermium radioactive isotope number 13: 252Fm |
| Neutrons: | 152; |
| Jn: | 0+; |
| Decay: | α : 100.00 %
SF : 2.3E-3 %; |
| t1/2: | 91404s ≈ 25.39 h; |
Fermium radioactive isotope number 14: 253Fm |
| Neutrons: | 153; |
| Jn: | 1/2+; |
| Decay: | ε : 88.00 %
α : 12.00 %; |
| t1/2: | 259200s ≈ 3.00 d; |
Fermium radioactive isotope number 15: 254Fm |
| Neutrons: | 154; |
| Jn: | 0+; |
| Decay: | α : 99.94 %
SF : 0.06 %; |
| t1/2: | 11664s ≈ 3.24 h; |
Fermium radioactive isotope number 16: 255Fm |
| Neutrons: | 155; |
| Jn: | 7/2+; |
| Decay: | α : 100.00 %
SF : 2.4E-5 %; |
| t1/2: | 72252s ≈ 20.07 h; |
Fermium radioactive isotope number 17: 256Fm |
| Neutrons: | 156; |
| Jn: | 0+; |
| Decay: | SF : 91.90 %
α : 8.10 %; |
| t1/2: | 9456s ≈ 2.63 h; |
Fermium radioactive isotope number 18: 257Fm |
| Neutrons: | 157; |
| Jn: | 9/2+; |
| Decay: | α : 99.79 %
SF : 0.21 %; |
| t1/2: | 8683200s ≈ 100.50 d; |
Fermium radioactive isotope number 19: 258Fm |
| Neutrons: | 158; |
| Jn: | 0+; |
| Decay: | SF ≤ 100.00 %; |
| t1/2: | 0.00037s ≈ 0.37 ms; |
Fermium radioactive isotope number 20: 259Fm |
| Neutrons: | 159; |
| Jn: | Unknown; |
| Decay: | SF : 100.00 %; |
| t1/2: | 1.5s ; |
Fermium radioactive isotope number 21: 260Fm |
| Neutrons: | 160; |
| Jn: | 0+; |
| Decay: | SF : 100.00 %; |
| t1/2: | 0.004s ≈ 4.00 ms; |
