Periodic Table of Elements

Pa - Protactinium

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Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
Pa212 121Syn3+5.1msα   
Pa213 122Syn 5.3ms    
Pa214 123Syn 17ms    
Pa215215.019124Syn 14msαAc211 8.170
Pa216216.019125Syn 0.20sαAc212~988.100
 0.20sεTh216~27.510
Pa217217.0183126Syn 4.9msαAc213 8.490
meta state 1.854MeVSyn 1.6msαAc213<=10010.344
Pa218218.02127Syn 0.12msαAc214 9.790
Pa219219.0199128Syn9/2-53nsαAc215 10.080
Pa220220.0219129Syn 0.78usεTh2203.0E -75.720
 0.78usαAc216 9.830
Pa221221.0219130Syn9/2-5.9usαAc217 9.250
Pa222222.0237131Syn 2.9msαAc218 8.850
Pa223223.023132Syn 6.5msαAc219 8.340
Pa224224.0256133Syn 0.79sαAc220 7.694
Pa225225.0261134Syn 1.7sαAc221 7.390
Pa226226.0279135Syn 1.8mαAc222746.987
 1.8mεTh226262.834
Pa227227.0288136Syn5/2-38.3mαAc223856.580
 38.3mεTh227151.019
Pa228228.031137Syn3+22hεTh228982.148
 22hαAc22426.265
Pa229229.0321138Syn5/2+1.50dεTh22999.520.316
 1.50dαAc2250.485.841
Pa230230.0345139Syn2-17.4dεTh23091.601.310
 17.4dβ-U2308.400.563
 17.4dαAc2260.00325.439
Pa231231.0359140100.3/2-32760yεTh23113E -10 
 32760ySF <=3E -10 
 32760yαAc227 5.149
Pa232232.0386141Syn2-1.31dεTh2320.00300.495
 1.31dβ-U232 1.337
Pa233233.0402142Syn3/2-26.967dβ-U233 0.571
Pa234234.0433143Syn4+6.70hβ-U234 2.197
meta state 0.074MeVSyn0-1.17mβ-U23499.842.271
 1.17mIT 0.160.074
Pa235235.0454144Syn3/2-24.5mβ-U235 1.410
Pa236236.049145Syn1-9.1mβ-U236 2.900
Pa237237.051146Syn1/2+8.7mβ-U237 2.250
Pa238238.0545147Syn3-2.3mSF <2.6E -63.460
 2.3mβ-U238 3.460
Pa239239.057148Syn      
Pa240240.061149Syn      
NuclidePotential Parent Nuclides
Pa212None known
Pa213None known
Pa214None known
Pa215None known
Pa216None known
Pa217None known
meta state 1.854MeVNone known
Pa218None known
Pa219None known
Pa220None known
Pa221None known
Pa222Np226 (Syn)
Pa223Np227 (Syn)
Pa224Np228 (Syn)
Pa225Np229 (Syn)
Pa226Np230 (Syn)
Pa227Np231 (Syn)
Pa228U228 (Syn)
Pa229Np233 (Syn) U229 (Syn)
Pa230None known
Pa231Np235 (Syn) Th231 (Syn) U231 (Syn)
Pa232Np236 (Syn)
Pa233Np237 (Syn) Th233 (Syn)
Pa234Th234 (Syn)
meta state 0.074MeVNone known
Pa235Th235 (Syn)
Pa236Th236 (Syn)
Pa237None known
Pa238None known
Pa239None known
Pa240None known

Key:

  • NN = Number of Neutrons
  • Abun % = Natural Abundance (as a percentage)
  • Syn = Synthetic Nuclide (does not occur in nature)
  • DM = Decay Mode
    α = Alpha emission
    β- = Beta emission
    β- β- = Double beta decay
    β+ = Positron emission
    ε = Electron Capture
    IT = Isomeric Transition
    N = Neutron emission
    P = Proton emission
    SF = Spontaneous Fission
  • DT = Decays To
  • BR % = Branch Ratio (as a percentage)

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References

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