Es
Einsteinium-254m
Protons (Z)
99
Neutrons (N)
155
Mass number
254
Half-Life
1.64 d
Abundance
---
Mass
254.088 u
Mass Excess
82,074.5 keV
Spin
2+
Discovered
1954
Binding energy per nucleon
7,443 keV
Neutron separation energy
5,007 keV
Proton separation energy
4,516 keV
Decay Mode
- SF<0.045%
Decay chain
- EsEinsteinium-254Z 99 · N 1551.64 d
- β⁻98%
- α99.941%
- α99.923%
- α99.974%
- α~100%
- α~100%
- β⁻100%
- β⁻100%
- α~100%
- α~100%
- α~100%
- α100%
- α99.98%
- β⁻100%
- β⁻99.976%
- α100%
- β⁻~100%
- β⁻~100%
- α100%