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Isotopes of the Element Silicon

[Click for Main Data]         Proton Emission     Neutron Emission     Electron Emission     Positron Emission

Most of the isotope data on this site has been obtained from the National Nuclear Data Center.

Naturally Occurring Isotopes

Mass NumberNatural AbundanceHalf-life
2892.223%STABLE
294.685%STABLE
303.092%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
2229 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
32.00%
2342.3 millisecondsElectron Capture with
delayed Proton Emission
71.00%
Electron Capture with
delayed Double Proton Emission
3.60%
Electron Capture100.00%
24140.5 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
45.00%
25220 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
35.00%
262.229 secondsElectron Capture100.00%
274.15 secondsElectron Capture100.00%
28STABLE--
29STABLE--
30STABLE--
31157.3 minutesBeta-minus Decay100.00%
32153 yearsBeta-minus Decay100.00%
336.11 secondsBeta-minus Decay100.00%
342.77 secondsBeta-minus Decay100.00%
350.78 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
< 5.00%
360.45 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
< 10.00%
3790 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
17.00%
38> 1 microsecondsBeta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus DecayNo Data Available
3947.5 millisecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
4033.0 millisecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
4120.0 millisecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission (suspected)  
No Data Available
4212.5 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
No Data Available
43> 60 nanosecondsBeta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus DecayNo Data Available
44> 360 nanoseconds   Beta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
45No Data AvailableNo Data AvailableNo Data Available