Pa

Protactinium-219

Protons (Z)

91

Neutrons (N)

128

Mass number

219

Half-Life

56.0 ns

Abundance

---

Mass

219.02 u

Mass Excess

18,580.0 keV

Spin

9/2-

Discovered

2005

Binding energy per nucleon

7,661 keV

Neutron separation energy

8,141 keV

Proton separation energy

1,076 keV

Decay Mode

Decay chain

Protactinium-219Z 91 · N 12856.0 ns
α100%
α~100%
α87%
β⁺90%
β⁺~100%
β⁺100%