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Isotopes of the Element Sodium

[Click for Main Data]

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

Naturally Occurring Isotopes

Mass NumberNatural AbundanceHalf-life
23100%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
181.3×10-21 secondsProton Emission100.00%
19< 40 nanosecondsProton EmissionNo Data Available
20447.9 millisecondsElectron Capture with
delayed Alpha Decay
20.05%
Electron Capture100.00%
2122.49 secondsElectron Capture100.00%
222.6027 yearsElectron Capture100.00%
23STABLE--
2414.997 hoursBeta-minus Decay100.00%
24m20.18 millisecondsIsomeric Transition99.95%
Beta-minus Decay~ 0.05%
2559.1 secondsBeta-minus Decay100.00%
261.07128 secondsBeta-minus Decay100.00%
27301 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.13%
2830.5 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.58%
2944.9 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
21.50%
3048 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
30.00%
Beta-minus Decay with delayed
Double Neutron Emission
1.15%
Beta-minus Decay with
delayed Alpha Decay
5.5×10-5 %
3117.0 millisecondsBeta-minus Decay with delayed
Double Neutron Emission
0.87%
Beta-minus Decay with
delayed Triple Neutron Emission
< 0.05%
Beta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
37.00%
3213.2 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
24.00%
Beta-minus Decay with delayed
Double Neutron Emission
8.00%
338.0 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
47.00%
Beta-minus Decay with delayed
Double Neutron Emission
13.00%
345.5 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with delayed
Double Neutron Emission
~ 50.00%
Beta-minus Decay with
delayed Neutron Emission
~ 15.00%
351.5 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
No Data Available
36< 180 nanosecondsNeutron EmissionNo Data Available
37> 60 nanosecondsBeta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus DecayNo Data Available