Das Periodensystem der Elemente online
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Nuklide nach Selektion gefunden: 23
Nuklid
Level
(MeV)
Atommasse (u)
Spin
% nat.
Halbwertszeit
Zerfall
%
155
La
57
0
154.95835
+5/2
60 Millisekunden (ms)
β
-
>0%
nβ
-
>0%
155
Ce
58
0
154.94804
-5/2
200 Millisekunden (ms)
β
-
>0%
nβ
-
>0%
155
Pr
59
0
154.94012
-5/2
1 Sekunden
β
-
>0%
nβ
-
>0%
155
Nd
60
0
154.932932
-3/2
8.9 Sekunden
β
-
100%
155
Pm
61
0
154.928101
-5/2
41.5 Sekunden
β
-
100%
155
Sm
62
0
154.92464
-3/2
22 Minuten 18 Sekunden
β
-
100%
155
Eu
63
0
154.922893
+5/2
4 Jahre 275 Tage
β
-
100%
155
Gd
64
0
154.922622
-3/2
14.8
stabil
155m
Gd
64
0.1211
154.922752
-11/2
32 Mikrosekunden (μs)
it
100%
155
Tb
65
0
154.923505
+3/2
5 Tage 7 Stunden 40 Minuten
ε
100%
155
Dy
66
0
154.925754
-3/2
9 Stunden 54 Minuten
ε
100%
155m
Dy
66
0.2343
154.926005
-11/2
6 Mikrosekunden (μs)
it
100%
155
Ho
67
0
154.929103
+5/2
48 Minuten
ε
100%
155m
Ho
67
0.142
154.929256
-11/2
880 Mikrosekunden (μs)
it
100%
155
Er
68
0
154.933209
-7/2
5 Minuten 18 Sekunden
ε
99.98%
α
0.02%
155
Tm
69
0
154.9392
-11/2
21.6 Sekunden
ε
99.11%
α
0.89%
155m
Tm
69
0.041
154.939244
+1/2
45 Sekunden
ε
98.5%
α
1.5%
155
Yb
70
0
154.945782
-7/2
1.793 Sekunden
α
89%
ε
11%
155
Lu
71
0
154.954316
-11/2
68 Millisekunden (ms)
α
90%
ε
10%
155m
Lu
71
0.02
154.954338
+1/2
138 Millisekunden (ms)
α
76%
ε
24%
155m
Lu
71
1.781
154.956228
-25/2
35 Mikrosekunden (μs)
it
100%
155
Hf
72
0
154.96339
-7/2
890 Millisekunden (ms)
ε
100%
155
Ta
73
0
154.974591
-11/2
2.9 Millisekunden (ms)
p
100%