Ir

Iridium-189n

Protons (Z)

77

Neutrons (N)

112

Mass number

189

Half-Life

3.7 ms

Abundance

---

Mass

188.961 u

Mass Excess

-36,117.0 keV

Spin

25/2+

Discovered

1975

Binding energy per nucleon

7,944 keV

Neutron separation energy

5,843 keV

Proton separation energy

2,269 keV

Decay Mode

γIridium-189100%

Decay chain

Iridium-189Z 77 · N 1123.7 ms
γ100%
EC100%