La

Lanthanum-138n

Protons (Z)

57

Neutrons (N)

81

Mass number

138

Half-Life

2.0 µs

Abundance

---

Mass

137.908 u

Mass Excess

-85,774.6 keV

Spin

7-

Discovered

2014

Binding energy per nucleon

8,370 keV

Neutron separation energy

6,705 keV

Proton separation energy

5,342 keV

Decay Mode

γLanthanum-138100%

Decay chain

Lanthanum-138Z 57 · N 812.0 µs
γ100%
β⁺65.5%