La

Lanthanum-135

Protons (Z)

57

Neutrons (N)

78

Mass number

135

Half-Life

18.91 h

Abundance

---

Mass

134.907 u

Mass Excess

-86,643.0 keV

Spin

5/2+

Discovered

1948

Binding energy per nucleon

8,383 keV

Neutron separation energy

9,495 keV

Proton separation energy

4,982 keV

Decay Mode

β⁺Barium-135100%

Decay chain

Lanthanum-135Z 57 · N 7818.91 h
β⁺100%