Isotopes of Carbon

Isotopes of Carbon

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

Isotopes of the Element Carbon with a Known Natural Abundance

All Known Isotopes of the Element Carbon

Mass Number	Half-life	Decay Mode	Branching Percentage

8	1.98739×10-21 seconds	Proton Emission	No Data Available
8	1.98739×10-21 seconds	Alpha Decay	No Data Available
9	126.5 milliseconds	Electron Capture	100
		Electron Capture with delayed Proton Emission	23
		Electron Capture with delayed Alpha Decay	17
10	19.26 seconds	Electron Capture	100
11	20.39 minutes	Electron Capture	100
12	Stable	–	–
13	Stable	–	–
14	5700 years	Beta-minus Decay	100
15	2.449 seconds	Beta-minus Decay	100
16	0.747 seconds	Beta-minus Decay	100
16	0.747 seconds	Beta-minus Decay with delayed Neutron Emission	99
17	193 milliseconds	Beta-minus Decay	100
17	193 milliseconds	Beta-minus Decay with delayed Neutron Emission	32
18	92 milliseconds	Beta-minus Decay	100
18	92 milliseconds	Beta-minus Decay with delayed Neutron Emission	31.5
19	49 milliseconds	Beta-minus Decay with delayed Neutron Emission	61
19	49 milliseconds	Beta-minus Decay	No Data Available
20	14 milliseconds	Beta-minus Decay	100
20	14 milliseconds	Beta-minus Decay with delayed Neutron Emission	72
21	< 30 nanoseconds	Neutron Emission	No Data Available
22	9 milliseconds	Beta-minus Decay	100
		Beta-minus Decay with delayed Neutron Emission	> 0.00
		Beta-minus Decay with delayed Double Neutron Emission	> 0.00

Resources:

http://education.jlab.org/itselemental/ele006.html
http://education.jlab.org/itselemental/iso006.html