La

Lanthanum-134m

Protons (Z)

57

Neutrons (N)

77

Mass number

134

Half-Life

29.0 µs

Abundance

---

Mass

133.909 u

Mass Excess

-84,780.0 keV

Spin

(6-)

Discovered

1985

Binding energy per nucleon

8,371 keV

Neutron separation energy

7,357 keV

Proton separation energy

4,515 keV

Decay Mode

γLanthanum-134100%

Decay chain

Lanthanum-134Z 57 · N 7729.0 µs
γ100%
β⁺100%