Pa

Protactinium-220

Protons (Z)

91

Neutrons (N)

129

Mass number

220

Half-Life

850.0 ns

Abundance

---

Mass

220.022 u

Mass Excess

20,278.0 keV

Spin

(1-)

Discovered

2005

Binding energy per nucleon

7,656 keV

Neutron separation energy

6,373 keV

Proton separation energy

1,471 keV

Decay Mode

Decay chain

Protactinium-220Z 91 · N 129850.0 ns
α100%
α100%
β⁺57%
α100%
α~100%