Isotopes of Caesium
Notable Isotopes
133
Cs
[78 neutrons]
Abundance:
100%
Stable with 78 neutrons
134
Cs
[79 neutrons]
Abundance:
synthetic
Half life:
2.0648 years [
Electron Capture
]
Decay Energy:
1.229
MeV
Decays to
134
Xe
.
Half life:
2.0648 years [
beta
-
]
Decay Energy:
2.059
MeV
Decays to
134
Ba
.
135
Cs
[80 neutrons]
Abundance:
trace
Half life:
2.3 x 10
6
years [
beta
-
]
Decay Energy:
0.269
MeV
Decays to
135
Ba
.
137
Cs
[82 neutrons]
Abundance:
synthetic
Half life:
30.07 years [
beta
-
]
Decay Energy:
1.176
MeV
Decays to
137
Ba
.
Mainly formed by nuclear fission.