Pa
Protactinium-217m
Protons (Z)
91
Neutrons (N)
126
Mass number
217
Half-Life
1.08 ms
Abundance
---
Mass
217.02 u
Mass Excess
18,915.0 keV
Spin
(23/2-)
Discovered
1979
Binding energy per nucleon
7,656 keV
Neutron separation energy
6,980 keV
Proton separation energy
-1,327 keV
Decay Mode
Decay chain
- PaProtactinium-217Z 91 · N 1261.08 ms
- α73%
- α100%
- α89%
- β⁺90%
- β⁺99.96%
- β⁺100%
- EC100%