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Periodic Table of Elements

Er - Erbium

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Nuclides / Isotopes

Nuc-
lide		Atomic
Mass		NNAbun
%		SpinHalf LifeDMDTBR
%		Decay
Energy
(MeV)
Er144 76Syn0+     
Er145144.95777Syn11/2-0.9s    
Er146145.95278Syn0+1.7s ε + PDy145>0 
 1.7s εHo146  
Er147146.94979Syn11/2-2.5s ε + PDy146>08.400
 2.5s εHo147 9.100
meta state 0.000MeVSyn1/2+~2.5s ε + PDy146>08.400
 ~2.5s εHo147 9.100
Er148147.94480Syn0+4.6s εHo148 6.800
Er149148.94281Syn1/2+4s ε + PDy14876.700
 4s εHo149 7.700
meta state 0.742MeVSyn11/2-8.9s εHo14996.58.442
 8.9sIT 3.50.742
 8.9s ε + PDy1480.187.442
Er150149.93882Syn0+18.5s εHo150 4.108
Er151150.93783Syn7/2-23.5s εHo151 5.400
meta state 2.585MeVSyn27/2-0.58sIT 95.32.586
 0.58s εHo1514.77.986
Er152151.935184Syn0+10.3sαDy148904.934
 10.3s εHo152103.109
Er153152.935185Syn7/2-37.1sαDy149534.803
 37.1s εHo153474.564
Er154153.932886Syn0+3.73m εHo15499.532.032
 3.73mαDy1500.474.280
meta state 3.025MeVSyn11-39nsITEr154~1003.025
 39nsαDy150~07.305
Er155154.933287Syn7/2-5.3m εHo15599.983.840
 5.3mαDy1510.024.120
Er156155.93188Syn0+19.5mαDy15201.370
 19.5m εHo156 1.370
Er157156.931989Syn3/2-18.65m εHo157~1003.500
 18.65mαDy153<0.023.300
meta state 0.155MeVSyn9/2+76msITEr157 0.155
Er158157.9390Syn0+2.29h εHo158 0.900
Er159158.930791Syn3/2-36m εHo159 2.769
Er160159.929192Syn0+28.58h εHo160 0.330
Er161160.9393Syn3/2-3.21h εHo161  
Er162161.9288940.140+Stable 
Er163162.9395Syn5/2-75m εHo163 1.210
Er164163.9292961.610+Stable 
Er165164.930797Syn5/2-10.36h εHo165 0.376
Er166165.93039833.60+Stable 
Er167166.93219922.957/2+Stable 
meta state 0.208MeVSyn1/2-2.269sIT  0.208
Er168167.932410026.80+Stable 
Er169168.9346101Syn1/2-9.4d β-Tm169 0.351
Er170169.935510214.90+Stable 
Er171170.938103Syn5/2-7.516h β-Tm171 1.490
Er172171.9394104Syn0+49.3h β-Tm172 0.891
Er173172.942105Syn7/2-1.4m β-Tm173 2.600
Er174173.944106Syn0+3.3m β-Tm174 1.800
Er175 107Syn9/2+1.2m β-   
Er176 108Syn0+     
Er177 109Syn      
NuclidePotential Parent Nuclides
Er144None known
Er145Tm146 (Syn) Tm146m (Syn)
Er146Tm147 (Syn) Tm147m (Syn)
Er147Tm147 (Syn)
meta state 0.000MeVNone known
Er148Tm148 (Syn)
Er149Tm149 (Syn) Yb153 (Syn)
meta state 0.742MeVNone known
Er150Tm150 (Syn) Yb151 (Syn) Yb154 (Syn)
Er151Tm151 (Syn) Tm151m (Syn) Yb152 (Syn) Yb155 (Syn)
meta state 2.585MeVNone known
Er152Tm152 (Syn) Tm152m (Syn) Yb156 (Syn)
Er153Tm153 (Syn) Tm153m (Syn) Yb157 (Syn)
Er154Er154m (Syn) Tm154 (Syn) Tm154m (Syn) Yb158 (Syn)
meta state 3.025MeVNone known
Er155Tm155 (Syn) Tm155m (Syn)
Er156Tm156 (Syn)
Er157Er157m (Syn) Tm157 (Syn)
meta state 0.155MeVNone known
Er158Tm158 (Syn)
Er159Tm159 (Syn)
Er160Tm160 (Syn) Tm160m (Syn)
Er161Tm161 (Syn)
Er162Tm162 (Syn) Tm162m (Syn)
Er163Tm163 (Syn)
Er164Ho164 (Syn) Tm164 (Syn) Tm164m (Syn)
Er165Tm165 (Syn)
Er166Ho166 (Syn) Ho166m (Syn) Tm166 (Syn)
Er167Ho167 (Syn) Tm167 (Syn)
meta state 0.208MeVNone known
Er168Ho168 (Syn) Ho168m (Syn) Tm168 (Syn)
Er169Ho169 (Syn)
Er170Ho170 (Syn) Ho170m (Syn) Tm170 (Syn)
Er171Ho171 (Syn)
Er172None known
Er173None known
Er174None known
Er175None known
Er176None known
Er177None 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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