Au

Gold-199m

Protons (Z)

79

Neutrons (N)

120

Mass number

199

Half-Life

440.0 µs

Abundance

---

Mass

198.969 u

Mass Excess

-28,544.9 keV

Spin

11/2-

Discovered

1968

Binding energy per nucleon

7,904 keV

Neutron separation energy

7,035 keV

Proton separation energy

5,930 keV

Decay Mode

γGold-199100%

Decay chain

Gold-199Z 79 · N 120440.0 µs
γ100%
β⁻100%