Periodic Table of Elements

U - Uranium

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Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
U218218.023126Syn0+1.5msαTh214 8.790
U219219.0249127Syn 42usαTh215 9.900
U220220.025128Syn0+     
U221221.026129Syn      
U222222.026130Syn0+1usαTh218 9.500
U223223.0277131Syn 18usαTh219 8.940
U224224.0276132Syn0+0.9msαTh220 8.620
U225225.0294133Syn 95msαTh221 8.020
U226226.0293134Syn0+0.35sαTh222 7.715
U227227.0311135Syn3/2+1.1mαTh223 7.211
U228228.0314136Syn0+9.1mαTh224>956.804
 9.1mεPa228<50.307
U229229.0335137Syn3/2+58mεPa229~801.309
 58mαTh225~206.475
U230230.0339138Syn0+20.8dαTh226 5.993
U231231.0363139Syn5/2-4.2dεPa231 0.360
meta state 0.000MeVSyn2+, 5/2+4.2dαTh227~05.550
U232232.0372140Syn0+68.9yαTh228 5.414
 68.9ySF   
U233233.0396141Syn5/2+159200ySF <6.0E -9 
 159200yαTh229 4.909
U234234.0411420.0060+245500ySF 1.7E -9 
 245500yαTh230 4.859
U235235.04391430.727/2- 77.038E 8ySF 7.0E -9 
 7.038E 8yαTh231 4.679
meta state 0.000MeVSyn1/2+~25mITU235  
U236236.0456144Syn0+2.342E 7ySF 9.6E -8 
 2.342E 7yαTh232 4.572
meta state 0.000MeVSyn 121nsSF 0.01 
U237237.0487145Syn1/2+6.75dβ-Np237 0.519
U238238.050814699.2750+4.468E 9ySF 0.00005 
 4.468E 9yαTh234 4.270
U239239.0543147Syn5/2+23.45mβ-Np239 1.265
U240240.0566148Syn0+14.1hβ-Np240 0.388
U241241.06149Syn      
U242242.063150Syn0+16.8mβ-Np242  
NuclidePotential Parent Nuclides
U218None known
U219None known
U220None known
U221None known
U222None known
U223None known
U224Pu228 (Syn)
U225Pu229 (Syn)
U226Pu230 (Syn)
U227None known
U228Np228 (Syn) Pu232 (Syn)
U229Np229 (Syn) Pu233 (Syn)
U230Np230 (Syn) Pa230 (Syn) Pu234 (Syn)
U231Np231 (Syn) Pu235 (Syn)
meta state 0.000MeVNone known
U232Np232 (Syn) Pa232 (Syn) Pu236 (Syn)
U233Np233 (Syn) Pa233 (Syn) Pu237 (Syn)
U234Np234 (Syn) Pa234 (Syn) Pa234m (Syn) Pu238 (Syn)
U235Np235 (Syn) Pa235 (Syn) Pu239 (Syn) U235m (Syn)
meta state 0.000MeVNone known
U236Np236 (Syn) Np236m (Syn) Pa236 (Syn) Pu240 (Syn)
meta state 0.000MeVNone known
U237Pa237 (Syn) Pu241 (Syn)
U238Pa238 (Syn) Pu242 (Syn)
U239None known
U240Pu244 (Syn)
U241None known
U242None 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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