Berkelium
Main article: Isotopes of berkelium
| Isotope | Half-life | Spin Parity | Mode(s) or Abundance |
|---|---|---|---|
| 238Bk | 144 s | %K+%β+=100, %KSF=0.048 | |
| 239Bk | (7/2+ ) | ||
| 240Bk | 4.8 m | %K+%β+=100, %KSF=1E-3 sys | |
| 241Bk | (7/2+ ) | ||
| 242Bk | 7.0 m | %K+%β+=100 | |
| 242m1Bk | 9.5 ns | ||
| 242m2Bk | 0.60 μs | ||
| 243Bk | 4.5 h | (3/2- ) | %K ~ 99.85, %α ~ 0.15 |
| 243m1Bk | 5 ns | ||
| 244Bk | 4.35 h | (1- ) | %K=99.994, %α=0.006 |
| 245Bk | 4.94 d | 3/2- | %K=99.88, %α=0.12 |
| 245m1Bk | 2 ns | ||
| 246Bk | 1.80 d | 2(-) | %K=100, %α<0.2 sys |
| 247Bk | 1380 a | (3/2- ) | %α < 100 |
| 248Bk | 9 a | (6+) | %α>70 |
| 248m1Bk | 23.7 h | 1(-) | %β-=70, %K=30, %α<0.001 |
| 249Bk | 320 d | 7/2+ | %β-=99.99855, %α=0.00145, %SF=4.76E-8 |
| 250Bk | 3.217 h | 2- | %β-=100 |
| 251Bk | 55.6 m | (3/2- ) | %β-=100, %α ~ 1E-5 |
Read more about this topic: Isotope Lists, 97+