La

Lanthanum-149

Protons (Z)

57

Neutrons (N)

92

Mass number

149

Half-Life

1.07 s

Abundance

---

Mass

148.935 u

Mass Excess

-60,220.0 keV

Spin

(3/2-)

Discovered

1979

Binding energy per nucleon

8,176 keV

Neutron separation energy

5,582 keV

Proton separation energy

9,964 keV

Decay Mode

Decay chain

Lanthanum-149Z 57 · N 921.07 s
β⁻98.57%
β⁻100%
β⁻100%
β⁻100%
β⁻100%