Isotopes of Protactinium
Notes
Protactinium has no stable isotopes.
Notable Isotopes
230
Pa
[139 neutrons]
Abundance:
synthetic
Half life:
17.4 days [
Electron Capture
]
Decay Energy:
1.310
MeV
Decays to
230
Th
.
Half life:
17.4 days [
beta
-
]
Decay Energy:
0.563
MeV
Decays to
230
U
.
231
Pa
[140 neutrons]
Abundance:
synthetic
Half life:
32760 years [
Alpha Decay
]
Decay Energy:
5.149
MeV
Decays to
227
Ac
.
233
Pa
[142 neutrons]
Abundance:
synthetic
Half life:
26.967 days [
beta
-
]
Decay Energy:
0.571
MeV
Decays to
233
U
.