Pb

Lead-197m

Protons (Z)

82

Neutrons (N)

115

Mass number

197

Half-Life

42.9 m

Abundance

---

Mass

196.974 u

Mass Excess

-24,426.0 keV

Spin

13/2+

Discovered

1957

Binding energy per nucleon

7,870 keV

Neutron separation energy

7,149 keV

Proton separation energy

4,218 keV

Decay Mode

Decay chain

Lead-197Z 82 · N 11542.9 m
β⁺81%
β⁺100%
EC100%