Das Periodensystem der Elemente online
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Nuklide nach Selektion gefunden: 23
Nuklid
Level
(MeV)
Atommasse (u)
Spin
% nat.
Halbwertszeit
Zerfall
%
149
Cs
55
0
148.95293
+3/2
50 Millisekunden (ms)
β
-
>0%
nβ
-
>0%
149
Ba
56
0
148.94258
-3/2
344 Millisekunden (ms)
β
-
99.57%
nβ
-
0.43%
149
La
57
0
148.934734
-3/2
1.05 Sekunden
β
-
98.57%
nβ
-
1.43%
149
Ce
58
0
148.9284
-3/2
5.3 Sekunden
β
-
100%
149
Pr
59
0
148.923718
+5/2
2 Minuten 15.6 Sekunden
β
-
100%
149
Nd
60
0
148.920149
-5/2
1 Stunden 43 Minuten 40.8 Sekunden
β
-
100%
149
Pm
61
0
148.918334
+7/2
2 Tage 5 Stunden 4 Minuten
β
-
100%
149m
Pm
61
0.2402
148.918592
-11/2
35 Mikrosekunden (μs)
it
100%
149
Sm
62
0
148.917185
-7/2
13.82
stabil
149
Eu
63
0
148.917932
+5/2
93 Tage 2 Stunden
ε
100%
149
Gd
64
0
148.919341
-7/2
9 Tage 6 Stunden 43 Minuten
ε
100%
α
4.3e-4%
149
Tb
65
0
148.923247
+1/2
4 Stunden 7 Minuten 5 Sekunden
ε
83.3%
α
16.7%
149m
Tb
65
0.0358
148.923285
-11/2
4 Minuten 9.6 Sekunden
ε
99.98%
α
0.02%
149
Dy
66
0
148.927305
-7/2
4 Minuten 12 Sekunden
ε
100%
149m
Dy
66
2.6611
148.930162
-27/2
490 Millisekunden (ms)
it
99.3%
ε
0.7%
149
Ho
67
0
148.933775
-11/2
21.1 Sekunden
ε
100%
149m
Ho
67
0.0488
148.933827
+1/2
56 Sekunden
ε
100%
149
Er
68
0
148.942306
+1/2
4 Sekunden
ε
93%
pε
7%
149m
Er
68
0.7418
148.943102
-11/2
8.9 Sekunden
ε
96.32%
pε
0.18%
it
3.5%
149m
Er
68
2.6111
148.945109
+19/2
610 Nanosekunden (ns)
it
100%
149m
Er
68
3.2427
148.945787
-27/2
4.8 Mikrosekunden (μs)
it
100%
149
Tm
69
0
148.95272
-11/2
900 Millisekunden (ms)
ε
99.8%
pε
0.02%
149
Yb
70
0
148.964039
+1/2
700 Millisekunden (ms)
pε
100%