Eu

Europium-155

Protons (Z)

63

Neutrons (N)

92

Mass number

155

Half-Life

4.74 y

Abundance

---

Mass

154.923 u

Mass Excess

-71,818.3 keV

Spin

5/2+

Discovered

1947

Binding energy per nucleon

8,217 keV

Neutron separation energy

8,151 keV

Proton separation energy

6,652 keV

Decay Mode

β⁻Gadolinium-155100%

Decay chain

Europium-155Z 63 · N 924.74 y
β⁻100%