Es
Einsteinium-255
Protons (Z)
99
Neutrons (N)
156
Mass number
255
Half-Life
39.8 d
Abundance
---
Mass
255.09 u
Mass Excess
84,089.0 keV
Spin
(7/2+)
Discovered
1954
Binding energy per nucleon
7,438 keV
Neutron separation energy
5,977 keV
Proton separation energy
4,541 keV
Decay Mode
- SF0.004%
Decay chain
- EsEinsteinium-255Z 99 · N 15639.8 d
- β⁻92%
- α~100%
- α100%
- α100%
- β⁻100%
- α~100%
- β⁻100%
- α~100%
- α~100%
- β⁻100%
- α~100%
- β⁻98.62%
- α100%
- α~100%
- α100%
- α~100%
- β⁻100%
- α~100%
- β⁻100%