Periodic Table of Elements

Ta - Tantalum

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Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
Ta156155.97283Syn2-144msεHf156501.029
 144msPHf155501.029
Ta157156.96884Syn1/2+10.1msαLu153>776.380
Ta158157.96685Syn2-36.5msαLu154936.210
 36.5msεHf158710.900
Ta159158.96386Syn 0.57sαLu155805.750
 0.57sεHf159208.490
Ta160159.96187Syn9+1.55sεHf160669.900
 1.55sαLu156345.450
Ta161160.958488Syn 2.7sεHf161~957.490
 2.7sαLu157~55.280
Ta162161.95789Syn 3.52sεHf16299.929.260
 3.52sαLu1580.085.010
Ta163162.954390Syn 10.6sεHf163~99.86.800
 10.6sαLu159~0.24.750
Ta164163.95491Syn3+14.2sεHf164 8.500
Ta165164.95192Syn 31sεHf165 5.800
Ta166165.9593Syn2+34.4sεHf166 7.700
Ta167166.94894Syn3/2+1.4mεHf167 5.000
Ta168167.94895Syn3+2mεHf168 6.700
Ta169168.94696Syn5/2-4.9mεHf169 4.440
Ta170169.94697Syn3+6.76mεHf170 6.000
Ta171170.94498Syn5/2-23.3mεHf171 3.700
Ta172171.94599Syn3+36.8mεHf172 4.920
Ta173172.944100Syn5/2-3.14hεHf173 2.790
Ta174173.9442101Syn3+1.05hεHf174 3.850
Ta175174.944102Syn7/2+10.5hεHf175 2.000
Ta176175.945103Syn1-8.09hεHf176 3.110
Ta177176.9445104Syn7/2+56.56hεHf177 1.166
Ta178177.946105Syn1+9.31mεHf178 1.910
meta state 0.000MeVSyn7-2.36hεHf178 1.910
meta state 1.471MeVSyn15-60msITTa178 1.471
Ta179178.9459106Syn7/2+1.82yεHf179 0.110
meta state 1.318MeVSyn25/2+9msITTa179 1.318
meta state 2.641MeVSyn37/2+52msITTa179 2.641
Ta180179.94751070.0121+8.125hεHf180860.854
 8.125hβ+W180140.708
meta state 0.075MeVSyn9->1.2E 15yβ-W180  
 >1.2E 15yεHf180  
Ta181180.94810899.9887/2+Stable 
Ta182181.9502109Syn3-114.43dβ-W182 1.814
meta state 0.016MeVSyn5+283msIT  0.016
meta state 0.520MeVSyn10-15.84mIT  0.520
Ta183182.9514110Syn1/2+5.1dβ-W183 1.070
Ta184183.954111Syn5-8.7hβ-W184 2.870
Ta185184.9556112Syn7/2+49.4mβ-W185 1.992
Ta186185.9586113Syn2-, 3-10.5mβ-W186 3.900
Ta187186.96114Syn      
Ta188 115Syn      
NuclidePotential Parent Nuclides
Ta156Re160 (Syn)
Ta157Re161 (Syn)
Ta158Re162 (Syn)
Ta159Re163 (Syn) W159 (Syn)
Ta160Re164 (Syn)
Ta161Re165 (Syn) W161 (Syn)
Ta162Re166 (Syn) W162 (Syn)
Ta163Re167 (Syn) W163 (Syn)
Ta164Re168 (Syn) W164 (Syn)
Ta165Re169 (Syn) W165 (Syn)
Ta166W166 (Syn)
Ta167W167 (Syn)
Ta168W168 (Syn)
Ta169W169 (Syn)
Ta170W170 (Syn)
Ta171W171 (Syn)
Ta172W172 (Syn)
Ta173W173 (Syn)
Ta174W174 (Syn)
Ta175W175 (Syn)
Ta176W176 (Syn)
Ta177W177 (Syn)
Ta178Ta178m1 (Syn) W178 (Syn)
meta state 0.000MeVNone known
meta state 1.471MeVNone known
Ta179Ta179m (Syn) Ta179m1 (Syn) W179 (Syn) W179m (Syn)
meta state 1.318MeVNone known
meta state 2.641MeVNone known
Ta180Hf180m (Syn)
meta state 0.075MeVNone known
Ta181Hf181 (Syn) W181 (Syn)
Ta182Hf182 (Syn) Hf182m (Syn)
meta state 0.016MeVNone known
meta state 0.520MeVNone known
Ta183Hf183 (Syn) Re187 (Natural)
Ta184Hf184 (Syn) Hf184m (Syn)
Ta185None known
Ta186None known
Ta187None known
Ta188None 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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