Pa

Protactinium-226

Protons (Z)

91

Neutrons (N)

135

Mass number

226

Half-Life

1.8 m

Abundance

---

Mass

226.028 u

Mass Excess

26,034.0 keV

Spin

(1-)

Discovered

1949

Binding energy per nucleon

7,641 keV

Neutron separation energy

6,397 keV

Proton separation energy

3,565 keV

Decay Mode

Decay chain

Protactinium-226Z 91 · N 1351.8 m
α74%
α99%
α100%
α100%
β⁻~100%
α100%