Das Periodensystem der Elemente online
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Nuklide nach Selektion gefunden: 49
Nuklid
Level
(MeV)
Atommasse (u)
Spin
% nat.
Halbwertszeit
Zerfall
%
202
Ra
88
0
202.009891
0
16 Millisekunden (ms)
α
100%
203
Ra
88
0
203.009272
-3/2
31 Millisekunden (ms)
α
100%
ε
>0%
203m
Ra
88
0.22
203.009508
+13/2
24 Millisekunden (ms)
α
100%
ε
>0%
it
>0%
204
Ra
88
0
204.0065
0
59 Millisekunden (ms)
α
100%
205
Ra
88
0
205.006269
-3/2
210 Millisekunden (ms)
α
100%
ε
>0%
205m
Ra
88
0.31
205.006601
+13/2
170 Millisekunden (ms)
α
100%
ε
>0%
206
Ra
88
0
206.003827
0
240 Millisekunden (ms)
α
100%
ε
>0%
207
Ra
88
0
207.003798
-3/2
1.3 Sekunden
α
90%
ε
10%
207m
Ra
88
0.47
207.004303
+13/2
55 Millisekunden (ms)
it
85%
α
15%
ε
0.35%
208
Ra
88
0
208.001839
0
1.3 Sekunden
α
95%
ε
5%
208m
Ra
88
1.8
208.003771
+8
270 Nanosekunden (ns)
it
100%
209
Ra
88
0
209.001991
-5/2
4.6 Sekunden
α
90%
ε
10%
210
Ra
88
0
210.000495
0
3.7 Sekunden
α
96%
ε
4%
210m
Ra
88
1.8
210.002427
+8
2.2 Mikrosekunden (μs)
it
100%
211
Ra
88
0
211.000898
-5/2
13 Sekunden
α
93%
ε
7%
212
Ra
88
0
211.999795
0
13 Sekunden
α
85%
ε
15%
212m
Ra
88
1.9584
212.001897
+8
10.9 Mikrosekunden (μs)
it
100%
212m
Ra
88
2.6134
212.0026
-11
850 Nanosekunden (ns)
it
100%
213
Ra
88
0
213.000383
-1/2
2 Minuten 43.8 Sekunden
α
80%
ε
20%
213m
Ra
88
1.77
213.002283
-15/2
2.2 Millisekunden (ms)
it
99%
α
1%
214
Ra
88
0
214.000107
0
2.46 Sekunden
α
99.94%
ε
0.06%
214m
Ra
88
1.8652
214.00211
+8
67.3 Mikrosekunden (μs)
it
99.91%
α
0.09%
215
Ra
88
0
215.00272
+9/2
1.6 Millisekunden (ms)
α
100%
215m
Ra
88
1.8778
215.004736
+25/2
7.1 Mikrosekunden (μs)
it
100%
215m
Ra
88
2.2469
215.005132
-29/2
1.4 Mikrosekunden (μs)
it
100%
215m
Ra
88
3.8
215.006799
-43/2
555 Nanosekunden (ns)
it
100%
216
Ra
88
0
216.003533
0
182 Nanosekunden (ns)
α
100%
ε
1e-8%
216m
Ra
88
1.5076
216.005152
+6
100 Pikosekunden (ps)
α
0.58%
it
99.42%
216m
Ra
88
1.7111
216.00537
+8
1.4 Nanosekunden (ns)
α
1.86%
it
98.14%
216m
Ra
88
2.026
216.005708
+10
600 Pikosekunden (ps)
α
0.12%
it
99.88%
217
Ra
88
0
217.00632
+9/2
1.6 Mikrosekunden (μs)
α
100%
218
Ra
88
0
218.00714
0
25.2 Mikrosekunden (μs)
α
100%
219
Ra
88
0
219.010085
+7/2
10 Millisekunden (ms)
α
100%
220
Ra
88
0
220.011028
0
18 Millisekunden (ms)
α
100%
221
Ra
88
0
221.013917
+5/2
28 Sekunden
α
100%
C-14
1e-12%
222
Ra
88
0
222.015374
0
38 Sekunden
α
100%
C-14
3e-8%
223
Ra
88
0
223.018502
+3/2
0.00008964
11 Tage 10 Stunden
α
100%
C-14
8.9e-8%
224
Ra
88
0
224.020212
0
0.00071921
3 Tage 15 Stunden 9 Minuten
α
100%
C-14
4e-9%
225
Ra
88
0
225.023612
+1/2
14 Tage 21 Stunden
β
-
100%
226
Ra
88
0
226.02541
0
99.5758015
1600 Jahre
α
100%
C-14
3.2e-9%
227
Ra
88
0
227.029178
+3/2
42 Minuten 12 Sekunden
β
-
100%
228
Ra
88
0
228.03107
0
0.42339
5 Jahre 273 Tage
β
-
100%
229
Ra
88
0
229.034957
+5/2
4 Minuten
β
-
100%
230
Ra
88
0
230.037056
0
1 Stunden 33 Minuten
β
-
100%
231
Ra
88
0
231.04122
+5/2
1 Minuten 43 Sekunden
β
-
100%
231m
Ra
88
0.0662
231.041291
+1/2
53 Mikrosekunden (μs)
it
100%
232
Ra
88
0
232.043639
0
4 Minuten 12 Sekunden
β
-
100%
233
Ra
88
0
233.048059
+1/2
30 Sekunden
β
-
100%
234
Ra
88
0
234.050703
0
30 Sekunden
β
-
100%