Periodic Table of Elements

Si - Silicon

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Nuclides / Isotopes

Nuc-
lide
Atomic
Mass
NNAbun
%
SpinHalf LifeDMDTBR
%
Decay
Energy
(MeV)
Si2222.0358Syn0+6msεAl22 13.980
 6msε + PMg21 13.960
Si2323.0269Syn >200ns    
Si2424.011510Syn0+102msε + PMg23~78.938
 102msεAl24 10.810
Si2525.004111Syn5/2+220msεAl25 12.741
 220msε + PMg24 10.470
Si2625.992312Syn0+2.234sεAl26 5.066
Si2726.986713Syn5/2+4.16sεAl27 4.812
Si2827.97691492.230+Stable 
Si2928.9765154.671/2+Stable 
Si3029.9738163.10+Stable 
Si3130.975417Syn3/2+157.3mβ-P31 1.492
Si3231.974218Syn0+150yβ-P32 0.224
Si3332.97819Syn 6.18sβ-P33 5.845
Si3433.978620Syn0+2.77sβ-P34 4.601
Si3534.984621Syn 0.78sβ-P35 10.500
Si3635.98722Syn0+0.45sβ- + NP35<104.390
 0.45sβ-P36 7.850
Si3736.99323Syn >1usβ- + NP36<155.660
Si3837.99624Syn0+>1us    
Si3939.00225Syn >1us    
Si4040.00626Syn0+>200ns    
Si4141.01327Syn >200ns    
Si4242.01628Syn0+>200ns    
NuclidePotential Parent Nuclides
Si22None known
Si23None known
Si24None known
Si25None known
Si26P26 (Syn)
Si27P27 (Syn) S28 (Syn)
Si28Al28 (Syn) Cl32 (Syn) P28 (Syn)
Si29Al29 (Syn) P29 (Syn)
Si30Al30 (Syn) P30 (Syn)
Si31Al31 (Syn)
Si32Al32 (Syn)
Si33Al34 (Syn)
Si34Al34 (Syn) Al35 (Syn)
Si35Al35 (Syn)
Si36None known
Si37Al37 (Syn)
Si38None known
Si39None known
Si40None known
Si41None known
Si42None 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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