Pa
Protactinium-220m
Protons (Z)
91
Neutrons (N)
129
Mass number
220
Half-Life
410.0 ns
Abundance
---
Mass
220.022 u
Mass Excess
20,304.0 keV
Spin
---
Discovered
2018
Binding energy per nucleon
7,655 keV
Neutron separation energy
6,347 keV
Proton separation energy
1,445 keV
Decay Mode
- α→Actinium-216100%
Decay chain
- PaProtactinium-220Z 91 · N 129410.0 ns
- α100%
- α100%
- β⁺57%
- α100%
- α~100%