Cs
Caesium-140m
Protons (Z)
55
Neutrons (N)
85
Mass number
140
Half-Life
471.0 ns
Abundance
---
Mass
139.917 u
Mass Excess
-77,036.0 keV
Spin
(2-)
Discovered
1974
Binding energy per nucleon
8,314 keV
Neutron separation energy
4,406 keV
Proton separation energy
8,680 keV
Decay Mode
- γ→Caesium-140100%
Decay chain
- CsCaesium-140Z 55 · N 85471.0 ns
- γ100%
- β⁻100%
- β⁻100%
- β⁻100%