Es
Einsteinium-256m
Protons (Z)
99
Neutrons (N)
157
Mass number
256
Half-Life
25.4 m
Abundance
---
Mass
256.094 u
Mass Excess
87,190.0 keV
Spin
(0+)
Discovered
1981
Binding energy per nucleon
7,428 keV
Neutron separation energy
4,970 keV
Proton separation energy
4,909 keV
Decay Mode
- β⁻→Fermium-256100%
Decay chain
- EsEinsteinium-256Z 99 · N 15725.4 m
- β⁻100%
- α8.1%
- α96.897%
- α91.61%
- α99.877%
- β⁻100%
- β⁻100%
- α~100%
- α~100%
- α~100%
- β⁻100%
- β⁻100%
- α~100%
- α~100%
- α100%
- α100%
- β⁻100%
- β⁻64.046%
- α100%