Es

Einsteinium-251

Protons (Z)

99

Neutrons (N)

152

Mass number

251

Half-Life

1.38 d

Abundance

---

Mass

251.08 u

Mass Excess

74,512.0 keV

Spin

3/2-

Discovered

1956

Binding energy per nucleon

7,466 keV

Neutron separation energy

6,789 keV

Proton separation energy

3,947 keV

Decay Mode

Decay chain

Einsteinium-251Z 99 · N 1521.38 d
EC99.5%
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%