Das Periodensystem der Elemente online
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Nuklide nach Selektion gefunden: 43
Nuklid
Level
(MeV)
Atommasse (u)
Spin
% nat.
Halbwertszeit
Zerfall
%
199
Os
76
0
198.97794
unbekannt
5 Sekunden
β
-
100%
201
Ir
77
0
200.97864
-1
β
-
100%
203
Pt
78
0
202.979066
-1/2
10 Sekunden
β
-
100%
205
Au
79
0
204.97987
+3/2
31 Sekunden
β
-
100%
207
Hg
80
0
206.982589
+9/2
2 Minuten 54 Sekunden
β
-
100%
209
Tl
81
0
208.985359
+1/2
2 Minuten 12 Sekunden
β
-
100%
211
Pb
82
0
210.988737
+9/2
0.000000000000012163
36 Minuten 6 Sekunden
β
-
100%
213
Bi
83
0
212.994385
-9/2
45 Minuten 35.4 Sekunden
β
-
97.8%
α
2.2%
215
Po
84
0
214.99942
+9/2
0.00000000071131
1.8 Millisekunden (ms)
α
100%
β
-
2.3e-4%
217
At
85
0
217.004719
-9/2
32.3 Millisekunden (ms)
α
99.993%
β
-
7e-3%
219
Rn
86
0
219.00948
+5/2
0.000055138
3.96 Sekunden
α
100%
221
Fr
87
0
221.014255
-5/2
4 Minuten 54 Sekunden
α
100%
β
-
>0%
223
Ra
88
0
223.018502
+3/2
0.00008964
11 Tage 10 Stunden
α
100%
C-14
8.9e-8%
225
Ac
89
0
225.02323
-3/2
10 Tage
α
100%
C-14
5e-10%
227
Th
90
0
227.027704
+1/2
18 Tage 16 Stunden
α
100%
229
Pa
91
0
229.032096
+5/2
1 Tage 12 Stunden
ε
99.52%
α
0.48%
229m
Pa
91
0.0116
229.032108
-3/2
420 Nanosekunden (ns)
it
100%
231
U
92
0
231.036293
-5/2
4 Tage 4 Stunden 48 Minuten
ε
99.996%
α
4e-3%
233
Np
93
0
233.040741
+5/2
36 Minuten 12 Sekunden
ε
100%
α
5e-4%
235
Pu
94
0
235.045286
+5/2
25 Minuten 18 Sekunden
ε
100%
α
2.8e-3%
237
Am
95
0
237.049996
-5/2
1 Stunden 13 Minuten 36 Sekunden
ε
99.97%
α
0.03%
237m
Am
95
2.4
237.052573
+7/2
5 Nanosekunden (ns)
f
100%
239
Cm
96
0
239.054957
-7/2
2 Stunden 54 Minuten
ε
99.9%
α
0.1%
241
Bk
97
0
241.060229
+7/2
4 Minuten 36 Sekunden
ε
100%
α
>0%
243
Cf
98
0
243.065427
+1/2
10 Minuten 42 Sekunden
ε
86%
α
14%
245
Es
99
0
245.071324
-3/2
1 Minuten 6 Sekunden
ε
60%
α
40%
247
Fm
100
0
247.076848
+7/2
29 Sekunden
ε
50%
α
50%
f
>0%
247m
Fm
100
0.1
247.076955
+1/2
4.3 Sekunden
α
100%
it
>0%
f
>0%
ε
>0%
249
Md
101
0
249.083013
-7/2
24 Sekunden
α
60%
ε
40%
249m
Md
101
0.1
249.08312
+1/2
1.9 Sekunden
α
100%
251
No
102
0
251.089012
+7/2
800 Millisekunden (ms)
α
84%
ε
16%
f
0.3%
251m
No
102
0.106
251.089126
+1/2
1.02 Sekunden
α
100%
253
Lr
103
0
253.095209
-7/2
570 Millisekunden (ms)
α
98.7%
f
1.3%
ε
>0%
253m
Lr
103
0.03
253.095531
-1/2
1.49 Sekunden
α
92%
f
8%
ε
>0%
255
Rf
104
0
255.101339
-9/2
1.68 Sekunden
f
52%
α
48%
ε
>0%
255m
Rf
104
0.08
255.101436
+5/2
1 Sekunden
f
100%
257
Db
105
0
257.107722
unbekannt
1.5 Sekunden
α
95%
f
5%
257m
Db
105
0.1
257.107829
unbekannt
790 Millisekunden (ms)
f
100%
259
Sg
106
0
259.1145
+1/2
480 Millisekunden (ms)
α
90%
f
10%
261
Bh
107
0
261.121664
unbekannt
12 Millisekunden (ms)
α
95%
f
5%
263
Hs
108
0
263.128558
+7/2
1 Millisekunden (ms)
f
100%
α
>0%
265
Mt
109
0
265.136151
unbekannt
2 Minuten
α
100%
267
Ds
110
0
267.144341
+9/2
2.8 Mikrosekunden (μs)
α
100%