Pa
Protactinium-229
Protons (Z)
91
Neutrons (N)
138
Mass number
229
Half-Life
1.55 d
Abundance
---
Mass
229.032 u
Mass Excess
29,897.0 keV
Spin
5/2+
Discovered
1949
Binding energy per nucleon
7,630 keV
Neutron separation energy
7,098 keV
Proton separation energy
4,163 keV
Decay Mode
Decay chain
- PaProtactinium-229Z 91 · N 1381.55 d
- EC99.51%
- α100%
- β⁻100%
- α~100%
- α~100%
- α99.992%
- β⁻97.91%
- α100%
- β⁻100%
- α100%