Ta

Tantalum-189

Protons (Z)

73

Neutrons (N)

116

Mass number

189

Half-Life

20.0 s

Abundance

---

Mass

188.966 u

Mass Excess

-31,960.0 keV

Spin

(7/2+)

Discovered

1999

Binding energy per nucleon

7,938 keV

Neutron separation energy

6,121 keV

Proton separation energy

8,419 keV

Decay Mode

β⁻Tungsten-189100%

Decay chain

Tantalum-189Z 73 · N 11620.0 s
β⁻100%
β⁻100%
β⁻100%