Periodic Table of Elements

Tb - Terbium

Terbium Menu

Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
Tb139138.94874Syn      
Tb140139.94675Syn52.4sε + PEu1390.267.300
 2.4sPGd1390.26-0.300
 2.4sεGd140 10.800
Tb141140.94176Syn5/2-3.5sεGd141 8.300
meta state 0.000MeVSyn 7.9sεGd141 8.300
Tb142141.93977Syn1+597msε + PEu141~3.0E -76.000
 597msεGd142 10.100
meta state 0.280MeVSyn5-303msεGd142 10.380
 303msε + PEu141 6.280
 303msIT  0.280
Tb143142.93578Syn11/2-12sεGd143 7.400
meta state 0.000MeVSyn5/2+<21sITTb143  
Tb144143.93379Syn1+~1sεGd144 8.900
meta state 0.397MeVSyn6-4.25sIT 660.397
 4.25sεGd144349.297
Tb145144.92980Syn1/2+ εGd145 6.510
meta state 0.000MeVSyn11/2-29.5sεGd145 6.700
Tb146145.927281Syn1+8sεGd1468.080MeV 
meta state 0.000MeVSyn5-23sεGd146 8.080
meta state 0.780MeVSyn10+1.18ms    
Tb147146.92482Syn1/2+1.7hεGd147 4.609
meta state 0.050MeVSyn11/2-1.83mεGd147 4.660
Tb148147.924383Syn2-60mεGd148 5.690
meta state 0.090MeVSyn9+2.2mεGd148 5.780
Tb149148.923284Syn1/2+4.118hεGd14983.33.636
 4.118hαEu14516.74.077
meta state 0.036MeVSyn11/2-4.16mεGd14999.983.672
 4.16mαEu1450.024.113
Tb150149.923785Syn2-3.48hαEu146<0.053.587
 3.48hεGd150 4.656
meta state 0.474MeVSyn9+5.8mεGd150~1005.130
Tb151150.923186Syn1/2+17.609hαEu1470.00953.497
 17.609hεGd151 2.565
meta state 0.099MeVSyn11/2-25sIT 93.80.100
 25sεGd1516.22.664
Tb152151.924187Syn2-17.5hαEu148<7.0E -73.090
 17.5hεGd152 3.990
meta state 0.501MeVSyn8+4.2mIT 78.80.502
 4.2mεGd15221.24.492
Tb153152.923488Syn5/2+2.34dεGd153 1.570
Tb154153.924789Syn021.5hβ-Dy154<0.10.250
 21.5hεGd154 3.560
meta state 0.000MeVSyn7-22.7hεGd15498.23.560
 22.7hIT 1.8 
meta state 0.000MeVSyn3-9.4hεGd15478.23.560
 9.4hIT 21.8 
 9.4hβ-Dy154<0.10.250
Tb155154.923590Syn3/2+5.32dεGd155 0.821
Tb156155.924791Syn3-5.35dβ-Dy156 0.434
 5.35dεGd156 2.444
meta state 0.050MeVSyn7-24.4hIT  0.050
meta state 0.088MeVSyn0+5.3hεGd156 2.532
 5.3hIT  0.088
Tb157156.92492Syn3/2+71yεGd157 0.060
Tb158157.925493Syn3-180yεGd15883.41.220
 180yβ-Dy15816.60.937
meta state 0.110MeVSyn0-10.7sβ-Dy158<0.61.047
 10.7sεGd158<0.011.330
 10.7sIT  0.110
meta state 0.388MeVSyn7-0.4msIT  0.388
Tb159158.925394100.3/2+Stable 
Tb160159.927295Syn3-72.3dβ-Dy160 1.835
Tb161160.927696Syn3/2+6.88dβ-Dy161 0.593
Tb162161.929597Syn1-7.6mβ-Dy162 2.510
Tb163162.930698Syn3/2+19.5mβ-Dy163 1.785
Tb164163.93399Syn5+3mβ-Dy164 3.890
Tb165164.935100Syn3/2+2.11mβ-Dy165 3.000
Tb166165.938101Syn      
Tb167166.94102Syn      
Tb168 103Syn      
Tb169 104Syn      
Tb170 105Syn      
Tb171 106Syn      
NuclidePotential Parent Nuclides
Tb139None known
Tb140None known
Tb141Dy141 (Syn)
meta state 0.000MeVNone known
Tb142Dy142 (Syn)
meta state 0.280MeVNone known
Tb143Dy143 (Syn) Ho144 (Syn) Tb143m (Syn)
meta state 0.000MeVNone known
Tb144Dy144 (Syn)
meta state 0.397MeVNone known
Tb145Dy145 (Syn) Dy145m (Syn) Ho146 (Syn)
meta state 0.000MeVNone known
Tb146Dy146 (Syn) Ho147 (Syn)
meta state 0.000MeVNone known
meta state 0.780MeVNone known
Tb147Dy147 (Syn) Dy147m (Syn) Ho148m (Syn) Ho151 (Syn) Ho151m (Syn)
meta state 0.050MeVNone known
Tb148Dy148 (Syn) Ho152 (Syn) Ho152m (Syn)
meta state 0.090MeVNone known
Tb149Dy149 (Syn) Dy149m (Syn) Ho153 (Syn) Ho153m (Syn)
meta state 0.036MeVNone known
Tb150Dy150 (Syn) Ho154 (Syn) Ho154m (Syn)
meta state 0.474MeVNone known
Tb151Dy151 (Syn)
meta state 0.099MeVNone known
Tb152Dy152 (Syn)
meta state 0.501MeVNone known
Tb153Dy153 (Syn)
Tb154None known
meta state 0.000MeVNone known
meta state 0.000MeVNone known
Tb155Dy155 (Syn)
Tb156None known
meta state 0.050MeVNone known
meta state 0.088MeVNone known
Tb157Dy157 (Syn)
Tb158None known
meta state 0.110MeVNone known
meta state 0.388MeVNone known
Tb159Dy159 (Syn) Gd159 (Syn)
Tb160None known
Tb161Gd161 (Syn)
Tb162Gd162 (Syn)
Tb163Gd163 (Syn)
Tb164Gd164 (Syn)
Tb165None known
Tb166None known
Tb167None known
Tb168None known
Tb169None known
Tb170None known
Tb171None 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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