La

Lanthanum-131m

Protons (Z)

57

Neutrons (N)

74

Mass number

131

Half-Life

170.0 µs

Abundance

---

Mass

130.91 u

Mass Excess

-83,464.0 keV

Spin

11/2-

Discovered

1966

Binding energy per nucleon

8,368 keV

Neutron separation energy

9,908 keV

Proton separation energy

3,496 keV

Decay Mode

γLanthanum-131100%

Decay chain

Lanthanum-131Z 57 · N 74170.0 µs
γ100%
β⁺100%
β⁺100%
EC100%