It's Elemental - Isotopes of the Element Silicon

Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

Isotopes of the Element Silicon with a Known Natural Abundance

All Known Isotopes of the Element Silicon

Mass Number	Half-life	Decay Mode	Branching Percentage

22	29 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	32.00

23	42.3 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	~ 73.00

		Electron Capture with delayed Double Proton Emission	< 4.00

24	140 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	38.00

25	220 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	36.81

26	2.234 seconds	Electron Capture	100.00

27	4.16 seconds	Electron Capture	100.00

28	Stable	-	-

29	Stable	-	-

30	Stable	-	-

31	157.3 minutes	Beta-minus Decay	100.00

32	132 years	Beta-minus Decay	100.00

33	6.18 seconds	Beta-minus Decay	100.00

34	2.77 seconds	Beta-minus Decay	100.00

35	0.78 seconds	Beta-minus Decay	100.00

36	0.45 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	< 10.00

37	90 milliseconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	17.00

38	No Data Available	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	No Data Available

39	No Data Available	Beta-minus Decay	No Data Available

40	> 200 nanoseconds	Beta-minus Decay	No Data Available

41	> 200 nanoseconds	No Data Available	No Data Available

42	No Data Available	No Data Available	No Data Available