La

Lanthanum-137

Protons (Z)

57

Neutrons (N)

80

Mass number

137

Half-Life

60.0 ky

Abundance

---

Mass

136.906 u

Mass Excess

-87,140.9 keV

Spin

7/2+

Discovered

1948

Binding energy per nucleon

8,382 keV

Neutron separation energy

9,172 keV

Proton separation energy

5,543 keV

Decay Mode

ECBarium-137100%

Decay chain

Lanthanum-137Z 57 · N 8060.0 ky
EC100%