Es
Einsteinium-256
Protons (Z)
99
Neutrons (N)
157
Mass number
256
Half-Life
7.6 h
Abundance
---
Mass
256.094 u
Mass Excess
87,190.0 keV
Spin
(7+)
Discovered
1976
Binding energy per nucleon
7,428 keV
Neutron separation energy
4,970 keV
Proton separation energy
4,909 keV
Decay Mode
- β⁻→Fermium-25699.998%
- β⁻SF0.002%
Decay chain
- EsEinsteinium-256Z 99 · N 1577.6 h
- β⁻99.998%
- 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%