Cs
Caesium-137
Protons (Z)
55
Neutrons (N)
82
Mass number
137
Half-Life
30.04 y
Abundance
---
Mass
136.907 u
Mass Excess
-86,545.8 keV
Spin
7/2+
Discovered
1951
Binding energy per nucleon
8,389 keV
Neutron separation energy
8,278 keV
Proton separation energy
7,406 keV
Decay Mode
- β⁻→Barium-137100%
Decay chain
- CsCaesium-137Z 55 · N 8230.04 y
- β⁻100%