La

Lanthanum-126

Protons (Z)

57

Neutrons (N)

69

Mass number

126

Half-Life

54.0 s

Abundance

---

Mass

125.92 u

Mass Excess

-74,970.0 keV

Spin

(5-)

Discovered

1961

Binding energy per nucleon

8,312 keV

Neutron separation energy

9,282 keV

Proton separation energy

2,590 keV

Decay Mode

β⁺Barium-126100%

Decay chain

Lanthanum-126Z 57 · N 6954.0 s
β⁺100%
β⁺100%
β⁺100%