La

Lanthanum-133

Protons (Z)

57

Neutrons (N)

76

Mass number

133

Half-Life

3.91 h

Abundance

---

Mass

132.908 u

Mass Excess

-85,494.0 keV

Spin

5/2+

Discovered

1950

Binding energy per nucleon

8,379 keV

Neutron separation energy

9,845 keV

Proton separation energy

4,348 keV

Decay Mode

β⁺Barium-133100%

Decay chain

Lanthanum-133Z 57 · N 763.91 h
β⁺100%
EC100%