Ba

Barium-137m

Protons (Z)

56

Neutrons (N)

81

Mass number

137

Half-Life

2.55 m

Abundance

---

Mass

136.907 u

Mass Excess

-87,059.74 keV

Spin

11/2-

Discovered

1965

Binding energy per nucleon

8,387 keV

Neutron separation energy

6,244 keV

Proton separation energy

8,010 keV

Decay Mode

γBarium-137100%

Decay chain

Barium-137Z 56 · N 812.55 m
γ100%