# Liste der Isotope/Ordnungszahl 91 bis Ordnungszahl 100

Liste der Isotope ist die Übersichtsseite, um komfortabel auf alle Elemente zugreifen zu können. Dort wird auch der Aufbau erklärt und die Legende zur Tabelle ist auch dort zu finden. Zerfallsenergien wurden mit den angegebenen Massen und dem Masse-Energie-Äquivalent von $\textstyle \Delta m=931{,}4940954{\frac {\mathrm {MeV} }{\mathrm {u} }}$ neu berechnet.

## $_{91}$ Protactinium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) |
| $^{212}$Pa | 5,1 ms | | (3+) | α = ? |
| $^{213}$Pa | 5,3 ms | | | α = ? |
| $^{214}$Pa | 17 ms | | | α = ? |
| $^{215}$Pa | 14 ms | 8,17 | | α |
| $^{216}$Pa | 0,20 s | 8,10 (?) | | α ≈ 98, ε ≈ 2 |
| $^{217}$Pa | 4,9 ms | 8,49 | | α |
| $^{217m1}$Pa | 1,6 ms | 10,344 | | α < 100 |
| $^{218}$Pa | 0,12 ms | 9,79 | | α |
| $^{219}$Pa | 53 ns | 10,08 | 9/2− | α ≈ 100, εβ$^+$ ≈ 5·10$^{−9}$ |
| $^{220}$Pa | 0,78 µs | 9,83 (α), 5,72 (εβ$^+$) | | α ≈ 100, εβ$^+$ = 3·10$^{−7}$ |
| $^{221}$Pa | 5,9 µs | 9,25 | 9/2− | α |
| $^{222}$Pa | 2,9 ms | 8,85 | | α |
| $^{223}$Pa | 6,5 ms | 8,34 | | α ≈ 100, εβ$^+$ < 1,0·10$^{−3}$ |
| $^{224}$Pa | 0,79 s | 7,694 | | α |
| $^{225}$Pa | 1,7 s | 7,39 | | α |
| $^{226}$Pa | 1,8 min | 6,987 (α), 2,834 (εβ$^+$) | | α = 74, εβ$^+$ = 26 |
| $^{227}$Pa | 38,3 min | 6,580 (α), 1,019 (ε) | (5/2−) | α = 85, ε = 15 |
| $^{228}$Pa | 22 h | 2,148 (εβ$^+$), 6,265 (α) | 3+ | εβ$^+$ = 98,0, α = 2,0 |
| $^{229}$Pa | 1,50 d | 0,316 (ε), 5,841 (α) | (5/2+) | ε ≈ 100, α = 0,48 |
| $^{230}$Pa | 17,4 d | 1,310 (εβ$^+$), 0,563 (β$^−$), 5,439 (α) | (2−) | εβ$^+$ = 91,6, β$^−$ = 8,4, α = 0,0032 |
| $^{231}$Pa | 32760 a | 5,149 (α), 51,843 ($^{23}$F), 60,41 ($^{24}$Ne) | 3/2− | α ≈ 100, SF < 1,6·10$^{−11}$, $^{23}$F = 1·10$^{−12}$, $^{24}$Ne = 6·10$^{−10}$ |
| $^{232}$Pa | 1,31 d | 1,337 (β$^−$), 0,495 (ε) | (2−) | β$^−$ ≈ 100, ε = 0,003 |
| $^{233}$Pa | 26,967 d | 0,571 | 3/2− | β$^−$ |
| $^{234}$Pa | 6,70 h | 2,197 | 4+ | β$^−$ ≈ 100, SF < 3·10$^{−10}$ |
| $^{234m1}$Pa | 1,17 min | 2,271 (β$^−$), 0,074 (ε) | (0−) | β$^−$ ≈ 100, IT = 0,16, SF < 1·10$^{−9}$ |
| $^{235}$Pa | 24,5 min | 1,41 | (3/2−) | β$^−$ |
| $^{236}$Pa | 9,1 min | 2,9 | 1(−) | β$^−$ |
| $^{237}$Pa | 8,7 min | 2,25 | (1/2+) | β$^−$ |
| $^{238}$Pa | 2,3 min | 3,46 (β$^−$) | (3−) | β$^−$ ≈ 100, SF < 2,6·10$^{−6}$ |

## $_{92}$ Uran

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) | NH (%) | Masse (u) |
| $^{216}$U | 4,5 ms | 8,53 | 0+ | α | | |
| $^{217}$U | 16 ms | 8,44 | 0+ | α | | |
| $^{218}$U | 510 µs | 8,78 | 0+ | α | | |
| $^{219}$U | 42 µs | 9,94 | | α | | |
| $^{220}$U | 60 ns | | 0+ | | | |
| $^{221}$U | 660 ns | | | α | | |
| $^{222}$U | 4,7 µs | 9,5 | 0+ | α | | |
| $^{223}$U | 18 µs | 8,94 | | α = ? | | |
| $^{224}$U | 0,84 ms | 8,62 | 0+ | α | | |
| $^{225}$U | 95 ms | 8,02 | | α | | |
| $^{226}$U | 0,268 s | 7,715 | 0+ | α | | |
| $^{227}$U | 1,1 min | 7,211 (α) | (3/2+) | α ≈ 100, εβ$^+$ < 0,001 | | |
| $^{228}$U | 9,1 min | 6,804 (α), 0,307 (ε) | 0+ | α > 95, ε < 5 | | |
| $^{229}$U | 58 min | 1,309 (εβ$^+$), 6,475 (α) | (3/2+) | εβ$^+$ ≈ 80, α ≈ 20 | | |
| $^{230}$U | 20,8 d | 5,993 (α), 61,387 ($^{22}$Ne) | 0+ | α ≈ 100, SF < 1,4·10$^{−10}$, $^{22}$Ne = 5·10$^{−11}$ | | |
| $^{231}$U | 4,2 d | 0,36 (ε), 5,55 (α) | (5/2−) | ε ≈ 100, α ≈ 0,0055 | | |
| $^{232}$U | 68,9 a | 5,414 (α), 62,309 ($^{24}$Ne), 74,318 ($^{28}$Mg) | 0+ | α ≈ 100, $^{24}$Ne = 1,89·10$^{−10}$, $^{28}$Mg = 1,2·10$^{−11}$ | | |
| $^{233}$U | 1,592·10$^5$ a | 4,909 (α), 60,485 ($^{24}$Ne), 60,776 ($^{25}$Ne), 74,225 ($^{28}$Mg) | 5/2+ | α ≈ 100, SF < 6·10$^{−11}$, $^{24}$Ne = 7,4·10$^{−11}$, $^{25}$Ne = 7,2·10$^{−11}$, $^{28}$Mg = 1,3·10$^{−13}$ | | |
| $^{234}$U | 2,455·10$^5$ a | 4,859 (α), 58,825 ($^{24}$Ne), 59,464 ($^{26}$Ne), 74,11 ($^{28}$Mg) | 0+ | α ≈ 100, SF = 1,64·10$^{−9}$, $^{24}$Ne = 9·10$^{−12}$?, $^{26}$Ne = 9·10$^{−12}$?, $^{28}$Mg = 2,2·10$^{−13}$ | 000,0055 | 234,0409503 |
| $^{235}$U | 7,038·10$^8$ a | 4,679 (α), 57,362 ($^{24}$Ne), 57,756 ($^{25}$Ne), 72,158 ($^{28}$Mg), 72,485 ($^{29}$Mg) | 7/2− | α ≈ 100, SF = 7,0·10$^{−9}$, $^{24}$Ne = 8·10$^{−10}$?, $^{25}$Ne = 8·10$^{−10}$?, $^{28}$Mg = 1,8·10$^{−10}$?, $^{29}$Mg = 1,8·10$^{−10}$? | 000,7200 | 235,0439281 |
| $^{235m1}$U | 25 min | ??? | 1/2+ | IT | | |
| $^{236}$U | 2,342·10$^7$ a | 4,572 (α), 55,944 ($^{24}$Ne), 56,744 ($^{26}$Ne), 70,564 ($^{28}$Mg), 72,303 ($^{30}$Mg) | 0+ | α ≈ 100, SF = 9,4·10$^{−8}$, $^{24}$Ne = 9·10$^{−10}$?, $^{26}$Ne = 9·10$^{−10}$?, $^{28}$Mg = 2·10$^{−11}$?, $^{30}$Mg = 2·10$^{−11}$? | | |
| $^{237}$U | 6,75 d | 0,519 | 1/2+ | β$^−$ | | |
| $^{238}$U | 4,468·10$^9$ a | 4,270 (α) | 0+ | α ≈ 100, SF = 5,45·10$^{−5}$, 2β = 2,2·10$^{−10}$ | 099,2745 | 238,050787618 |
| $^{238m1}$U | 225 ns | | 0+ | | | |
| $^{238m2}$U | 1 ns | | | | | |
| $^{239}$U | 23,45 min | 1,265 | 5/2+ | β$^−$ | | |
| $^{240}$U | 14,1 h | 0,338 | 0+ | β$^−$ | | |
| $^{241}$U | | | | | | |
| $^{242}$U | 16,8 min | | 0+ | β$^−$ | | |

## $_{93}$ Neptunium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) |
| $^{225}$Np | 6 ms | | | α = ? |
| $^{226}$Np | 35 ms | 8,2 | | α |
| $^{227}$Np | 0,51 s | 7,816 (α) | | α ≈ 100, εβ$^+$ ≈ 0,05 |
| $^{228}$Np | 61,4 s | 4,48 (ε), 7,42 (α) | | ε = 60, α = 40, εSF = 0,020 |
| $^{229}$Np | 4,0 min | 7,01 (α), 2,56 (ε) | | α > 50, ε < 50 |
| $^{230}$Np | 4,6 min | 3,61 (εβ$^+$), 6,78 (α) | | εβ$^+$ < 97, α > 3 |
| $^{231}$Np | 48,8 min | 1,84 (ε), 6,37 (α) | (5/2) | ε = 98, α = 2 |
| $^{232}$Np | 14,7 min | 2,70 | (4+) | εβ$^+$ |
| $^{233}$Np | 36,2 min | 1,23 (ε), 5,83 (α) | (5/2+) | ε = 100, α < 0,001 |
| $^{234}$Np | 4,4 d | 1,81 | (0+) | εβ$^+$ |
| $^{235}$Np | 396,1 d | 0,124 (ε), 5,192 (α) | 5/2+ | ε ≈ 100, α = 0,00260 |
| $^{236}$Np | 1,54·10$^5$ a | 0,94 (ε), 0,49 (β$^−$), 5,02 (α) | (6−) | ε = 87,3, β$^−$ = 12,5, α = 0,16 |
| $^{236m1}$Np | 22,5 h | 1,00 (ε), 0,55 (β$^−$) | 1 | ε = 52, β$^−$ = 48 |
| $^{237}$Np | 2,144·10$^6$ a | 4,959 (α), 74,818 ($^{30}$Mg) | 5/2+ | α ≈ 100, SF < 2·10$^{−10}$, $^{30}$Mg = 8·10$^{−12}$ |
| $^{237m1}$Np | 45 ns | | | α ≈ 100, SF = ? |
| $^{238}$Np | 2,117 d | 1,292 | 2+ | β$^−$ |
| $^{238m1}$Np | 112 ns | | | |
| $^{239}$Np | 2,3565 d | 0,722 | 5/2+ | β$^−$ |
| $^{240}$Np | 61,9 min | 2,20 | (5+) | β$^−$ |
| $^{240m1}$Np | 7,22 min | 2,20 (β$^−$), 0 (IT) | 1(+) | β$^−$ ≈ 100, IT = 0,11 |
| $^{241}$Np | 13,9 min | 1,31 | (5/2+) | β$^−$ |
| $^{242}$Np | 5,5 min | 2,70 | (6) | β$^−$ |
| $^{242m1}$Np | 2,2 min | 2,70 | (1+) | β$^−$ |
| $^{243}$Np | 1,8 min | 2,17 | (5/2−) | β$^−$ |
| $^{244}$Np | 2,29 min | | (7−) | β$^−$ |

## $_{94}$ Plutonium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) | NH (%) |
| $^{228}$Pu | 4 ms | 7,95 | 0+ | α | |
| $^{229}$Pu | 90 s | | | α | |
| $^{230}$Pu | 1,7 min | 7,175 (α) | 0+ | α < 100, εβ$^+$ > 0 | |
| $^{231}$Pu | 8,6 min | | | εβ$^+$ = ?, α = ? | |
| $^{232}$Pu | 34,1 min | 1,06 (εβ$^+$), 6,716 (α) | 0+ | ε = 77, α = 23 | |
| $^{233}$Pu | 20,9 min | 1,90 (εβ$^+$), 6,42 (α) | | εβ$^+$ ≈ 100, α = 0,12 | |
| $^{234}$Pu | 8,8 h | 0,388 (εβ$^+$), 6,31 (α) | 0+ | ε ≈ 94, α ≈ 6 | |
| $^{234m1}$Pu | 3 ns | | | | |
| $^{235}$Pu | 25,3 min | 1,17 (εβ$^+$), 6,00 (α) | (5/2+) | εβ$^+$ ≈ 100, α = 0,0027 | |
| $^{235m1}$Pu | 25 ns | | | | |
| $^{236}$Pu | 2,858 a | 5,867 (α), 79,669 ($^{28}$Mg) | 0+ | α ≈ 100, SF = 1,37·10$^{−7}$, $^{28}$Mg = 8·10$^{−12}$ | |
| $^{236m1}$Pu | 37·10$^{−12}$ s | | (0+) | | |
| $^{236m2}$Pu | 34 ns | | | | |
| $^{237}$Pu | 45,2 d | 0,22 (ε), 5,75 (α) | 7/2− | ε ≈ 100, α = 0,0042 | |
| $^{237m1}$Pu | 0,18 s | 0,146 (IT) | 1/2+ | IT | |
| $^{237m2}$Pu | 85 ns | | | SF ≤ 100 | |
| $^{237m3}$Pu | 1,1 µs | | | SF ≤ 100 | |
| $^{238}$Pu | 87,74 a | 5,593 (α), 75,911 ($^{28}$Mg), 76,823 ($^{30}$Mg), 76,823 ($^{32}$Si) | 0+ | α ≈ 100, SF = 1,85·10$^{−7}$, $^{28}$Mg ≈ 6·10$^{−15}$?, $^{30}$Mg ≈ 6·10$^{−15}$?, $^{32}$Si ≈ 1,4·10$^{−14}$ | |
| $^{238m1}$Pu | 0,6 ns | | | SF ≤ 100 | |
| $^{238m2}$Pu | 6,0 ns | | (0+) | SF ≤ 100 | |
| $^{239}$Pu | 24110 a | 5,245 (α) | 1/2+ | α ≈ 100, SF = 3,0·10$^{−10}$ | |
| $^{239m1}$Pu | 7,5 µs | | (5/2+) | | |
| $^{239m2}$Pu | 2,6 ns | | (9/2−) | | |
| $^{240}$Pu | 6563 a | 5,256 (α), 91,191($^{34}$Si) | 0+ | α ≈ 100, SF = 5,75·10$^{−6}$, $^{34}$Si = 1,1·10$^{−12}$ | |
| $^{240m1}$Pu | 3,7 ns | | 0+ | SF > 0 | |
| $^{241}$Pu | 14,35 a | 0,021 (β$^−$), 5,140 (α) | 5/2+ | β$^−$ ≈ 100, α = 0,0025, SF ≈ 2,4·10$^{−14}$ | |
| $^{241m1}$Pu | 21 µs | | | SF > 0 | |
| $^{241m2}$Pu | 32 ns | | | | |
| $^{242}$Pu | 3,733·10$^5$ a | 4,984 (α) | 0+ | α ≈ 100, SF = 5,54·10$^{−4}$ | |
| $^{243}$Pu | 4,956 h | 0,528 | 7/2+ | β$^−$ | |
| $^{243m1}$Pu | 45 ns | | | | |
| $^{244}$Pu | 8,00·10$^7$ a | 4,666 (α) | 0+ | α = 99,879, SF = 0,121, 2β < 3·10$^{−11}$ | 100 |
| $^{244m1}$Pu | 0,4 ns | | 0+ | SF ≤ 100 | |
| $^{245}$Pu | 10,5 h | 1,205 | (9/2−) | β$^−$ | |
| $^{245m1}$Pu | 90 ns | | | | |
| $^{246}$Pu | 10,84 d | 0,401 | 0+ | β$^−$ | |
| $^{247}$Pu | 2,27 d | | | β$^−$ | |

## $_{95}$ Americium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) |
| $^{232}$Am | 79 s | ? (ε), 7,2 (α) | | ε ≈ 98, α ≈ 2, εSF = 0,069 |
| $^{233}$Am | | 4,17 (εβ$^+$), 6,87 (α) | | εβ$^+$ ≈ 100, α = 0,04 |
| $^{234}$Am | 2,32 min | | | ε ≈ 100, α = 0,039, εSF = 0,0066 |
| $^{235}$Am | 15 min | | | εβ$^+$ = ?, α = ? |
| $^{236}$Am | | 3,28 (ε), 6,45 (α) | | ε = ?, α = ? |
| $^{237}$Am | 73,0 min | 1,73 (ε), 6,25 (α) | 5/2(−) | ε ≈ 100, α = 0,025 |
| $^{237m1}$Am | 5 ns | | | SF = ? |
| $^{238}$Am | 98 min | 2,26 (εβ$^+$), 6,04 (α) | 1+ | εβ$^+$ ≈ 100, α = 1,0·10$^{−4}$ |
| $^{238m1}$Am | 35 µs | | | |
| $^{239}$Am | 11,9 h | 0,803 (ε), 5,924 (α) | (5/2)− | ε ≈ 100, α = 0,010 |
| $^{239m1}$Am | 163 ns | | (7/2+) | |
| $^{240}$Am | 50,8 h | 1,379 (ε), 5,710 (α) | (3−) | ε = 100, α = 1,9·10$^{−4}$ |
| $^{240m1}$Am | 0,924 ms | | | SF = ? |
| $^{241}$Am | 432,2 a | 5,638 (α), 93,927 ($^{34}$Si) | 5/2− | α ≈ 100, SF = 4,3·10$^{−10}$, $^{34}$Si = 5·10$^{−13}$ |
| $^{241m1}$Am | 1,2 µs | | | |
| $^{242}$Am | 16,02 h | 0,665 (β$^−$), 0,751 (ε) | 1− | β$^−$ = 82,7, ε = 17,3 |
| $^{242m1}$Am | 141 a | 0,049 (β$^−$), 5,637 (α) | 5− | IT ≈ 100, α = 0,459, SF < 4,7·10$^{−9}$ |
| $^{242m2}$Am | 14,0 ms | 2,20 (β$^−$), 7,788 (α) | | SF = ?, IT = ? |
| $^{243}$Am | 7370 a | 5,438 (α) | 5/2− | α ≈ 100, SF = 3,7·10$^{−9}$ |
| $^{243m1}$Am | 5,5 µs | | | |
| $^{244}$Am | 10,1 h | 1,428 (β$^−$) | (6−) | β$^−$ |
| $^{244m1}$Am | 6,5 µs | | | SF = ? |
| $^{244m2}$Am | 26 min | 1,516 (β$^−$), 0,164 (ε) | 1+ | β$^−$ ≈ 100, ε = 0,0361 |
| $^{245}$Am | 2,05 h | 0,894 | (5/2)+ | β$^−$ |
| $^{245m1}$Am | 0,64 µs | | | |
| $^{246}$Am | 39 min | 2,376 | (7−) | β$^−$ |
| $^{246m1}$Am | 25,0 min | 2,376 (β$^−$), 0 (IT) | 2(−) | β$^−$ ≈ 100, IT < 0,01 |
| $^{246m2}$Am | 73 µs | | | |
| $^{247}$Am | 23,0 min | 1,7 | (5/2) | β$^−$ |
| $^{248}$Am | | 3,1 | (5/2) | β$^−$ |

## $_{96}$ Curium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) |
| $^{233}$Cm | 1 min | | 3/2+ | |
| $^{234}$Cm | 51 s | | 0+ | β$^+$ = 47, SF = 3 |
| $^{235}$Cm | 5 min | | 5/2+ | |
| $^{235p}$Cm | | | | |
| $^{236}$Cm | 10 min | 1,71 (εβ$^+$), 7,1 (α) | 0+ | εβ$^+$ = ?, α = ? |
| $^{237}$Cm | 20 min | | 5/2+ | α = ? |
| $^{237p}$Cm | | | 7/2− | |
| $^{238}$Cm | 2,4 h | 0,97 (ε), 6,62 (α) | 0+ | ε = 96,16, α = 3,84 |
| $^{239}$Cm | 2,9 h | 1,7 (ε), 6,46 (α) | (7/2−) | ε ≈ 100, α < 0,1 |
| $^{240}$Cm | 27 d | 6,397 (α), 0,215 (ε) | 0+ | α ≈ 100, ε < 0,5, SF = 3,9·10$^{−6}$ |
| $^{240m1}$Cm | 10 ps | | | SF ≤ 100 |
| $^{240m2}$Cm | 55 ns | | | SF ≈ 100 |
| $^{241}$Cm | 32,8 d | 0,767 (ε), 6,185 (α) | 1/2+ | ε ≈ 100, α = 1,0 |
| $^{241m1}$Cm | 15,3 ns | | | |
| $^{242}$Cm | 162,8 d | 6,216 (α), 96,51 ($^{34}$Si) | 0+ | α ≈ 100, SF = 6,37·10$^{−6}$, $^{34}$Si = 1·10$^{−14}$ |
| $^{242m1}$Cm | 40 ps s | | | |
| $^{242m2}$Cm | 0,18 µs | 2,80 (IT) | | IT = ?, SF = ? |
| $^{243}$Cm | 29,1 a | 6,196 (α), 0,009 (ε) | 5/2+ | α ≈ 100, ε = 0,29 , SF = 5,3·10$^{−9}$ |
| $^{243m1}$Cm | 42 ns | | | |
| $^{244}$Cm | 18,10 a | 5,902 (α) | 0+ | α ≈ 100, SF = 1,371·10$^{−4}$ |
| $^{244m1}$Cm | 34 ms | 1,04 (IT) | 6+ | IT = 100, SF < 7,7·10$^{−10}$ |
| $^{245}$Cm | 8500 a | 5,623 (α) | 7/2+ | α ≈ 100, SF = 6,1·10$^{−7}$ |
| $^{245m1}$Cm | 13,2 ns | | | |
| $^{246}$Cm | 4730 a | 5,475 (α) | 0+ | α ≈ 100, SF = 0,0263 |
| $^{247}$Cm | 1,56·10$^7$ a | 5,353 | 9/2− | α |
| $^{248}$Cm | 3,40·10$^5$ a | 5,162 (α) | 0+ | α = 91,61, SF = 8,39 |
| $^{249}$Cm | 64,15 min | | 1/2(+) | β$^−$ |
| $^{250}$Cm | 9000 a | 5,169 (α), 0,90 (β$^−$) | 0+ | SF ≈ 86, α ≈ 8, β$^−$ ≈ 6 |
| $^{251}$Cm | 16,8 min | 1,42 | (1/2+) | β$^−$ |
| $^{252}$Cm | 2 d | | 0+ | β$^−$ |

## $_{97}$ Berkelium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) |
| $^{238}$Bk | 144 s | 5,0 (εβ$^+$) | | εβ$^+$ ≈ 100, εSF = 0,048 |
| $^{239}$Bk | | | (7/2+) | |
| $^{240}$Bk | 4,8 min | 3,94 (εβ$^+$) | | εβ$^+$ ≈ 100, εSF = 1·10$^{−3}$ |
| $^{241}$Bk | | | (7/2+) | |
| $^{242}$Bk | 7,0 min | 3,0 (εβ$^+$) | | εβ$^+$ ≈ 100, SF > 0 |
| $^{242m1}$Bk | 9,5 ns | | | |
| $^{242m2}$Bk | 0,60 µs | | | |
| $^{243}$Bk | 4,5 h | 1,508 (ε), 6,874 (α) | (3/2−) | ε ≈ 100, α ≈ 0,15 |
| $^{243m1}$Bk | 5 ns | | | |
| $^{244}$Bk | 4,35 h | 2,26 (ε), 6,78 (α) | (1−) | ε ≈ 100, α = 0,006 |
| $^{244m1}$Bk | 820 ns | | | SF ≤ 100 |
| $^{245}$Bk | 4,94 d | 0,81 (ε), 6,455 (α) | 3/2− | ε ≈ 100, α = 0,12 |
| $^{245m1}$Bk | 2 ns | | | |
| $^{246}$Bk | 1,80 d | 1,35 (ε), 6,07 (α) | 2(−) | ε = 100, α < 0,2 |
| $^{247}$Bk | 1380 a | 5,889 | (3/2−) | α < 100 |
| $^{248}$Bk | 9 a | 5,803 | (6+) | α > 70 |
| $^{248m1}$Bk | 23,7 h | 0,87 (β$^−$), 0,717 (ε), 5,803 (α) | 1(−) | β$^−$ = 70, ε = 30, α < 0,001 |
| $^{249}$Bk | 320 d | 0,125 (β$^−$), 5,526 (α) | 7/2+ | β$^−$ ≈ 100, α = 0,00145, SF = 4,76·10$^{−8}$ |
| $^{250}$Bk | 3,217 h | 1,78 | 2− | β$^−$ |
| $^{251}$Bk | 55,6 min | 1,093 (β$^−$), 5,57 (α) | (3/2−) | β$^−$ ≈ 100, α ≈ 1·10$^{−5}$ |

## $_{98}$ Californium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) |
| $^{237}$Cf | 2,1 s | | | SF ≈ 10 |
| $^{238}$Cf | 21 ms | | 0+ | SF ≈ 100 |
| $^{239}$Cf | 39 s | 7,81 (α), 3,9 (ε) | | α > 50, ε < 50 |
| $^{240}$Cf | 1,06 min | 7,719 (α) | 0+ | α ≈ 87, SF ≈ 13 |
| $^{241}$Cf | 3,78 min | 3,3 (ε), 7,66 (α) | | ε ≈ 75, α ≈ 25 |
| $^{242}$Cf | 3,49 min | 7,516 (α) | 0+ | α = 65, SF < 1,4·10$^{−2}$ |
| $^{243}$Cf | 10,7 min | 2,22 (ε), 7,39 (α) | (1/2+) | ε ≈ 86, α ≈ 14 |
| $^{244}$Cf | 19,4 min | 7,329 | 0+ | α = 70 |
| $^{245}$Cf | 45,0 min | 1,569 (ε), 7,256 (α) | (5/2+) | ε = 64, α = 36 |
| $^{246}$Cf | 35,7 h | 6,862 (α), 0,12 (ε) | 0+ | α ≈ 100, SF = 2,3·10$^{−4}$, ε < 5·10$^{−4}$ |
| $^{246m1}$Cf | 45 ns | | | |
| $^{247}$Cf | 3,11 h | 0,646 (ε), 6,527 (α) | (7/2+) | ε ≈ 100, α = 0,035 |
| $^{248}$Cf | 333,5 d | 6,361 (α) | 0+ | α ≈ 100, SF = 0,0029 |
| $^{249}$Cf | 351 a | 6,295 (α) | 9/2− | α ≈ 100, SF = 4,4·10$^{−7}$ |
| $^{250}$Cf | 13,08 a | 6,176 (α) | 0+ | α ≈ 100, SF = 0,077 |
| $^{251}$Cf | 898 a | 6,176 (α) | 1/2+ | α |
| $^{252}$Cf | 2,645 a | 6,217 (α) | 0+ | α = 96,908, SF = 3,092 |
| $^{253}$Cf | 17,81 d | 0,285 (β$^−$), 6,124 (α) | (7/2+) | β$^−$ = 99,69, α = 0,31 |
| $^{254}$Cf | 60,5 d | 5,926 (α) | 0+ | SF = 99,69, α = 0,31 |
| $^{255}$Cf | 85 min | 0,7 | (9/2+) | β$^−$ |
| $^{256}$Cf | 12,3 min | 5,6 (α) | 0+ | SF = 100, β$^−$ < 1, α ≈ 1·10$^{−6}$ |

## $_{99}$ Einsteinium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) |
| $^{241}$Es | 9 s | | | α |
| $^{242}$Es | 40 s | 5,6 (ε) | | α ≈ 100, εSF = 1,4 |
| $^{243}$Es | 21 s | 4,0 (ε), 8,072 (α) | | ε < 70, α > 30 |
| $^{244}$Es | 37 s | 4,56 (ε), 7,95 (α) | | ε = 96, α = 4, εSF = 0,01 |
| $^{245}$Es | 1,1 min | 3,05 (ε), 7,909 (α) | (3/2−) | ε = 60, α = 40 |
| $^{246}$Es | 7,7 min | 3,88 (ε), 7,74 (α) | (4−, 6+) | ε = 90,1, α = 9,9, εSF = 0,003 |
| $^{247}$Es | 4,55 min | 2,48 (ε), 7,49 (α) | (7/2+) | ε ≈ 93, α ≈ 7 |
| $^{248}$Es | 27 min | | (2−, 0+) | ε ≈ 100, α ≈ 0,25, εSF = 3·10$^{−5}$ |
| $^{249}$Es | 102,2 min | 1,45 (ε), 6,94 (α) | 7/2(+) | ε ≈ 100, α = 0,57 |
| $^{250}$Es | 8,6 h | 2,10 (ε), 6,88 (α) | (6+) | ε > 97, α < 3 |
| $^{250m1}$Es | 2,22 h | 2,10 (ε), 6,88 (α) | 1(−) | ε ≈ 100, α < 1 |
| $^{251}$Es | 33 h | 0,376 (ε), 6,597 (α) | (3/2−) | ε ≈ 100, α = 0,49 |
| $^{252}$Es | 471,7 d | 6,76 (α), 1,26 (ε), 0,48 (β$^−$) | (5−) | α = 76, ε = 24, β$^−$ ≈ 0,01 |
| $^{253}$Es | 20,47 d | 6,739 (α) | 7/2+ | α ≈ 100, SF = 8,9·10$^{−6}$ |
| $^{254}$Es | 275,7 d | 6,628 (α), 0,654 (ε), 1,09 (β$^−$) | (7+) | α ≈ 100, ε < 1·10$^{−4}$, β$^−$ = 1,74·10$^{−6}$, SF < 3·10$^{−6}$ |
| $^{254m1}$Es | 39,3 h | 1,168 (β$^−$), 0,078 (IT), 6,696 (α), 0,732 (ε) | 2+ | β$^−$ ≈ 100, α = 0,33, IT < 3, ε = 0,078, SF < 0,045 |
| $^{255}$Es | 39,8 d | 0,288 (β$^−$), 6,436 (α) | (7/2+) | β$^−$ = 92,0, α = 8,0, SF = 0,0045 |
| $^{256}$Es | 25,4 min | 1,67 | (1+) | β$^−$ |
| $^{256m1}$Es | 7,6 h | 1,67 (β$^−$) | (8+) | β$^−$ ≈ 100, SF = 0,002 |
| $^{257}$Es | 7,8 d | | | SF = ?, β$^−$ = ? |

## $_{100}$ Fermium

| Iso­top | Halb­werts­zeit | Zerfalls­energie (MeV) | Spin / Parität | Zerfalls­art(en) (%) |
| $^{242}$Fm | 0,8 ms | | 0+ | SF |
| $^{243}$Fm | 0,18 s | 8,69 (α) | | α < 100, SF < 0,5, ε = ? |
| $^{244}$Fm | 3,3 ms | | 0+ | SF |
| $^{245}$Fm | 4,2 s | 8,44 (α) | | α ≈ 100, SF < 0,11 |
| $^{246}$Fm | 1,1 s | 8,374 (α), 2,16 (ε) | 0+ | α = 92, SF = 7,3, ε < 1 |
| $^{247}$Fm | 35 s | 8,19 (α) | | α > 50, εβ$^+$ < 50 |
| $^{247m1}$Fm | 9,2 s | | | α < 100 |
| $^{248}$Fm | 36 s | 8,002 (α), 1,6 (ε) | 0+ | α = 93, ε ≈ 7, SF = 0,10 |
| $^{249}$Fm | 2,6 min | 2,44 (ε), 7,81 (α) | (7/2+) | ε ≈ 85, α ≈ 15 |
| $^{250}$Fm | 30 min | 7,557 (α), 0,8 (ε) | 0+ | α > 90, ε < 10, SF = 0,0069 |
| $^{250m1}$Fm | 1,8 s | 1,0 (IT) | | IT > 80, SF < 8·10$^{−5}$ |
| $^{251}$Fm | 5,30 h | 1,474 (ε), 7,425 (α) | (9/2−) | ε = 98,20, α = 1,80 |
| $^{252}$Fm | 25,39 h | 7,153 (α) | 0+ | α ≈ 100, SF = 0,00232 |
| $^{253}$Fm | 3,00 d | 0,333 (ε), 7,197 (α) | 1/2+ | ε = 88, α = 12 |
| $^{254}$Fm | 3,240 h | 7,307 (α) | 0+ | α ≈ 100, SF = 0,0592 |
| $^{255}$Fm | 20,07 h | 7,241 (α) | 7/2+ | α ≈ 100, SF = 2,3·10$^{−5}$ |
| $^{256}$Fm | 157,6 min | 7,027 (α) | 0+ | SF = 91,9, α = 8,1 |
| $^{256m1}$Fm | 70 ns | | | IT > 80, SF = ? |
| $^{257}$Fm | 100,5 d | 6,864 (α) | (9/2+) | α = 99,790, SF = 0,210 |
| $^{258}$Fm | 370 µs | | 0+ | SF |
| $^{259}$Fm | 1,5 s | | | SF |
| $^{260}$Fm | 4 ms | | | SF |

## Quellen

* ↑ Datenquelle
Siehe auch Liste der Isotope#Weblinks
bis 10 ∙ 11 bis 20 ∙ 21 bis 30 ∙ 31 bis 40 ∙ 41 bis 50 ∙ 51 bis 60 ∙ 61 bis 70 ∙ 71 bis 80 ∙ 81 bis 90 ∙ 91 bis 100 ∙ ab 101