Periodic Table of Elements

At - Astatine

Astatine Menu

Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
At193 108Syn ~40ms    
At194193.999109Syn ~40msαBi190 7.310
At195194.997110Syn 0.63sαBi191>757.400
 0.63sεPo195<258.000
At196195.996111Syn 0.253sαBi192>07.200
At197196.993112Syn9/2-0.35sαBi193967.100
 0.35sεPo19747.200
meta state 0.052MeVSyn1/2+3.7sαBi193<=1007.152
 3.7sεPo197 7.252
At198197.993113Syn3+4.2sαBi194906.893
 4.2sεPo198108.800
meta state 0.102MeVSyn10-1sαBi194846.995
 1sεPo198168.902
At199198.991114Syn9/2-7.2sαBi195906.780
 7.2sεPo199106.600
At200199.99115Syn3+43sαBi196576.596
 43sεPo200437.970
meta state 0.104MeVSyn7+47sεPo200<=578.074
 47sαBi196436.700
meta state 0.335MeVSyn10-3.5sIT ~840.335
 3.5sαBi196~10.56.931
 3.5sεPo200~4.58.305
At201200.988116Syn9/2-89sαBi197716.473
 89sεPo201295.850
At202201.988117Syn2, 3+184sεPo202827.210
 184sαBi198186.354
meta state 0.000MeVSyn7+182sεPo20291.37.210
 182sαBi1988.76.354
meta state 0.391MeVSyn10-0.46sITAt20299.70.392
 0.46sεPo2020.257.602
 0.46sαBi1980.16.746
At203202.987118Syn9/2-7.4mεPo203695.060
 7.4mαBi199316.210
At204203.9873119Syn7+9.2mεPo204966.480
 9.2mαBi2003.86.070
meta state 0.587MeVSyn10-108msIT  0.587
At205204.986120Syn9/2-26.2mεPo205904.540
 26.2mαBi201106.020
At206205.9866121Syn5+30mεPo20699.115.720
 30mαBi2020.895.888
At207206.9858122Syn9/2-1.8hεPo20791.43.910
 1.8hαBi2038.65.873
At208207.9866123Syn6+1.63hεPo20899.454.973
 1.63hαBi2040.555.751
At209208.9862124Syn9/2-5.41hεPo20995.93.486
 5.41hαBi2054.15.757
At210209.9871125100.5+8.1hεPo21099.823.981
 8.1hαBi2060.185.631
At211210.9875126Syn9/2-7.214hεPo21158.20.786
 7.214hαBi20741.85.982
At212211.9907127Syn1-0.314sεPo212<0.031.754
 0.314sβ-Rn212<2.0E -60.043
 0.314sαBi208 7.829
meta state 0.222MeVSyn9-0.119sαBi208>998.051
 0.119sITAt212<10.222
At213212.9929128Syn9/2-125nsαBi209 9.254
At214213.9964129Syn1-558nsαBi210 8.987
meta state 0.059MeVSyn 265nsαBi210<1009.046
meta state 0.231MeVSyn9-760nsαBi210<=1009.218
At215214.9986130Syn9/2-0.1msαBi211 8.178
At216216.0024131Syn1-0.3msβ-Rn216<0.00602.003
 0.3msεPo216<3.0E -70.469
 0.3msαBi212 7.949
meta state 0.413MeVSyn9-0.1msαBi212 8.362
At217217.0047132Syn9/2-32.3msαBi21399.997.202
 32.3msβ-Rn2170.010.740
At218218.0087133Syn 1.5sαBi21499.906.874
 1.5sβ-Rn2180.102.883
At219219.0113134Syn 56sαBi215~976.390
 56sβ-Rn219~31.700
At220220.015135Syn33.71mβ-Rn220923.650
 3.71mαBi21686.050
At221221.018136Syn 2.3mβ-Rn221  
At222222.022137Syn 54sβ-Rn222 4.400
At223223.025138Syn 50sβ-Rn223  
NuclidePotential Parent Nuclides
At193None known
At194None known
At195None known
At196None known
At197Fr201 (Syn)
meta state 0.052MeVNone known
At198Fr202 (Syn) Fr202m (Syn) Rn198 (Syn)
meta state 0.102MeVNone known
At199Fr203 (Syn) Rn199 (Syn)
At200Fr204 (Syn) Fr204m (Syn) Fr204m1 (Syn) Rn200 (Syn)
meta state 0.104MeVNone known
meta state 0.335MeVNone known
At201Rn201 (Syn) Rn201m (Syn)
At202At202m1 (Syn) Fr206 (Syn) Fr206m (Syn) Fr206m1 (Syn) Rn202 (Syn)
meta state 0.000MeVNone known
meta state 0.391MeVNone known
At203Fr207 (Syn) Rn203 (Syn) Rn203m (Syn)
At204Fr205 (Syn) Fr208 (Syn) Rn204 (Syn)
meta state 0.587MeVNone known
At205Fr209 (Syn) Rn205 (Syn)
At206Fr210 (Syn) Rn206 (Syn)
At207Fr211 (Syn) Rn207 (Syn)
At208Fr212 (Syn) Rn208 (Syn)
At209Fr213 (Syn) Rn209 (Syn)
At210Fr214 (Syn) Fr214m (Syn) Rn210 (Syn)
At211Fr215 (Syn) Rn211 (Syn)
At212At212m (Syn) Fr216 (Syn) Fr216m (Syn)
meta state 0.222MeVNone known
At213Fr217 (Syn)
At214Fr218 (Syn) Fr218m (Syn)
meta state 0.059MeVNone known
meta state 0.231MeVNone known
At215Fr219 (Syn) Po215 (Syn)
At216Fr220 (Syn)
meta state 0.413MeVNone known
At217Fr221 (Syn)
At218Po218 (Syn)
At219Fr223 (Natural)
At220None known
At221None known
At222None known
At223None 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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