Periodic Table of Elements

Ar - Argon

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Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
Ar3030.02212Syn0+<20ns    
Ar3131.01213Syn 15.1ms    
Ar3231.997714Syn0+98msεCl32 11.150
 98msε + PS31 9.580
Ar3332.989915Syn1/2+173msε + PS3238.79.350
 173msεCl33 11.620
Ar3433.980316Syn0+844.5msεCl34 6.061
Ar3534.975317Syn3/2+1.775sεCl35 5.965
Ar3635.9675180.3370+Stable 
Ar3736.966819Syn3/2+35.04dεCl37 0.813
Ar3837.9627200.0630+Stable 
Ar3938.964321Syn7/2-269yβ-K39 0.565
Ar4039.96242299.60+Stable 
Ar4140.964523Syn7/2-109.34mβ-K41 2.492
Ar4241.96324Syn0+32.9yβ-K42 0.600
Ar4342.965725Syn5/2-5.37mβ-K43 4.620
Ar4443.965426Syn0+11.87mβ-K44 3.550
Ar4544.968127Syn 21.48sβ-K45 6.890
Ar4645.968128Syn0+8.4sβ-K46 5.700
Ar4746.97229Syn ~700msβ- + NK46<11.440
 ~700msβ-K47 9.790
Ar4847.97530Syn0+     
Ar4948.98231Syn =>170ns    
Ar5049.98632Syn0+=>170ns    
Ar5150.99333Syn >200ns    
Ar5251.99834Syn0+     
Ar5353.0135Syn      
NuclidePotential Parent Nuclides
Ar30None known
Ar31None known
Ar32None known
Ar33None known
Ar34None known
Ar35Ca36 (Syn) K35 (Syn)
Ar36Ca37 (Syn) Cl36 (Syn) K36 (Syn) Sc40 (Syn)
Ar37K37 (Syn)
Ar38Cl38 (Syn) K38 (Syn) K38m (Syn)
Ar39Cl39 (Syn)
Ar40Cl40 (Syn) K40 (Natural)
Ar41Cl41 (Syn)
Ar42Cl42 (Syn)
Ar43Cl43 (Syn) Cl44 (Syn)
Ar44Cl44 (Syn) Cl45 (Syn)
Ar45Cl45 (Syn) Cl46 (Syn)
Ar46Cl46 (Syn) Cl47 (Syn)
Ar47Cl47 (Syn)
Ar48None known
Ar49None known
Ar50None known
Ar51None known
Ar52None known
Ar53None 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

A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

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