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Periodic Table of Elements

Ce - Cerium

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Nuclides / Isotopes

Nuc-
lide		Atomic
Mass		NNAbun
%		SpinHalf LifeDMDTBR
%		Decay
Energy
(MeV)
Ce119118.95361Syn      
Ce120119.94762Syn0+     
Ce121120.94463Syn      
Ce122121.93864Syn0+     
Ce123122.93665Syn5/23.2s εLa123 8.600
 3.2s ε + PBa122 6.900
Ce124123.93166Syn0+6s εLa124 5.600
Ce125124.92967Syn5/2+9s εLa125 7.300
 9s ε + PBa124 5.200
Ce126125.92468Syn0+50s εLa126>04.400
Ce127126.92369Syn5/2+31s εLa127 6.100
Ce128127.91970Syn0+4.1s εLa128 3.200
Ce129128.91871Syn5/2+3.5m εLa129>05.050
Ce130129.91572Syn0+25m εLa130 2.200
Ce131130.91473Syn7/2+10.2m εLa131 4.000
meta state 0.000MeVSyn1/2+5m εLa131 4.000
Ce132131.91174Syn0+3.51h εLa132 1.290
 3.51hIT  2.341
meta state 2.340MeVSyn8-, 9-13ms    
Ce133132.91275Syn1/2+97m εLa133 2.900
meta state 0.037MeVSyn9/2-4.9h εLa133 2.937
Ce134133.90976Syn0+3.16d εLa134 0.500
Ce135134.909177Syn1/2+17.7h εLa135 2.026
meta state 0.445MeVSyn1/2-20sIT  0.446
Ce136135.9071780.190+Stable 
Ce137136.907879Syn3/2+9h εLa137 1.222
meta state 0.254MeVSyn11/2-34.4hIT 99.220.254
 34.4h εLa1370.781.476
Ce138137.906800.250+Stable 
meta state 2.129MeVSyn7-8.65msIT  2.129
Ce139138.906781Syn3/2+137.640d εLa139 0.278
meta state 0.754MeVSyn11/2-54.8sIT  0.754
Ce140139.90548288.480+Stable 
Ce141140.908383Syn7/2-32.501d β-Pr141 0.581
Ce142141.90928411.080+>5E 16y β-Nd142  
Ce143142.912485Syn3/2-33.039h β-Pr143 1.462
Ce144143.913686Syn0+284.893d β-Pr144 0.319
Ce145144.917287Syn3/2-3.01m β-Pr145 2.540
Ce146145.918788Syn0+13.52m β-Pr146 1.040
Ce147146.922589Syn5/2-56.4s β-Pr147 3.290
Ce148147.92490Syn0+56s β-Pr148 2.060
Ce149148.928391Syn3/2-5.3s β-Pr149 4.190
Ce150149.9392Syn0+4s β-Pr150 3.010
Ce151150.93493Syn 1.02s β-Pr151 5.400
Ce152151.93694Syn0+1.4s β-Pr152 4.500
Ce153152.94195Syn >150ns    
Ce154153.94396Syn0+>150ns    
Ce155154.94897Syn >150ns    
Ce156155.95198Syn0+     
Ce157156.95699Syn      
NuclidePotential Parent Nuclides
Ce119None known
Ce120None known
Ce121None known
Ce122None known
Ce123None known
Ce124Pr124 (Syn)
Ce125None known
Ce126Nd127 (Syn) Pr126 (Syn)
Ce127Pr127 (Syn)
Ce128Nd129 (Syn) Pr128 (Syn)
Ce129Pr129 (Syn)
Ce130Nd131 (Syn) Pr130 (Syn)
Ce131Pr131 (Syn) Pr131m (Syn)
meta state 0.000MeVNone known
Ce132Pr132 (Syn)
meta state 2.340MeVNone known
Ce133Pr133 (Syn)
meta state 0.037MeVNone known
Ce134Pr134 (Syn) Pr134m (Syn)
Ce135Pr135 (Syn)
meta state 0.445MeVNone known
Ce136Pr136 (Syn)
Ce137Pr137 (Syn)
meta state 0.254MeVNone known
Ce138La138 (Natural) Pr138 (Syn) Pr138m (Syn)
meta state 2.129MeVNone known
Ce139Pr139 (Syn)
meta state 0.754MeVNone known
Ce140La140 (Syn) Nd144 (Natural) Pr140 (Syn)
Ce141La141 (Syn)
Ce142La142 (Syn) Pr142 (Syn)
Ce143La143 (Syn)
Ce144La144 (Syn)
Ce145La145 (Syn)
Ce146La146 (Syn) La146m (Syn) La147 (Syn)
Ce147La147 (Syn) La148 (Syn)
Ce148La148 (Syn) La149 (Syn)
Ce149La149 (Syn) La150 (Syn)
Ce150La150 (Syn)
Ce151None known
Ce152La152 (Syn)
Ce153None known
Ce154None known
Ce155None known
Ce156None known
Ce157None 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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