Sb

Antimony-129n

Protons (Z)

51

Neutrons (N)

78

Mass number

129

Half-Life

2.23 µs

Abundance

---

Mass

128.911 u

Mass Excess

-82,768.0 keV

Spin

15/2-

Discovered

1987

Binding energy per nucleon

8,404 keV

Neutron separation energy

6,209 keV

Proton separation energy

6,696 keV

Decay Mode

γAntimony-129100%

Decay chain

Antimony-129Z 51 · N 782.23 µs
γ100%
β⁻100%
β⁻100%
β⁻100%