Ir

Iridium-191m

Protons (Z)

77

Neutrons (N)

114

Mass number

191

Half-Life

4.9 s

Abundance

---

Mass

190.961 u

Mass Excess

-36,537.5 keV

Spin

11/2-

Discovered

1955

Binding energy per nucleon

7,947 keV

Neutron separation energy

7,855 keV

Proton separation energy

5,119 keV

Decay Mode

γIridium-191100%

Decay chain

Iridium-191Z 77 · N 1144.9 s
γ100%