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Isotopes of the Element Iodine

[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
127100%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
107No Data AvailableNo Data AvailableNo Data Available
10836 millisecondsAlpha Decay91.00%
Electron Capture9.00%
Proton Emission< 1.00%
10993.5 microsecondsProton Emission99.99%
Alpha Decay0.01%
1100.65 secondsElectron Capture83.00%
Alpha Decay17.00%
Electron Capture with
delayed Proton Emission
11.00%
Electron Capture with
delayed Alpha Decay
1.10%
1112.5 secondsElectron Capture99.90%
Alpha Decay~ 0.10%
1123.42 secondsElectron Capture100.00%
Alpha Decay~ 1.2×10-3 %
1136.6 secondsElectron Capture100.00%
Alpha Decay3.3×10-7 %
1142.1 secondsElectron Capture with
delayed Proton Emission
No Data Available
Electron Capture100.00%
114m6.2 secondsElectron Capture91.00%
Isomeric Transition9.00%
1151.3 minutesElectron Capture100.00%
1162.91 secondsElectron Capture100.00%
1172.22 minutesElectron Capture100.00%
11813.7 minutesElectron Capture100.00%
118m8.5 minutesElectron Capture< 100.00%
Isomeric TransitionNo Data Available
11919.1 minutesElectron Capture100.00%
12081.6 minutesElectron Capture100.00%
120m53 minutesElectron Capture100.00%
1212.12 hoursElectron Capture100.00%
1223.63 minutesElectron Capture100.00%
12313.2235 hoursElectron Capture100.00%
1244.1760 daysElectron Capture100.00%
12559.407 daysElectron Capture100.00%
12612.93 daysElectron Capture52.70%
Beta-minus Decay47.30%
127STABLE--
12824.99 minutesBeta-minus Decay93.10%
Electron Capture6.90%
1291.57×10+7 yearsBeta-minus Decay100.00%
13012.36 hoursBeta-minus Decay100.00%
130m8.84 minutesBeta-minus Decay16.00%
Isomeric Transition84.00%
1318.0252 daysBeta-minus Decay100.00%
1322.295 hoursBeta-minus Decay100.00%
132m1.387 hoursIsomeric Transition86.00%
Beta-minus Decay14.00%
13320.83 hoursBeta-minus Decay100.00%
133m9 secondsIsomeric Transition100.00%
13452.5 minutesBeta-minus Decay100.00%
134m3.52 minutesIsomeric Transition97.70%
Beta-minus Decay2.30%
1356.58 hoursBeta-minus Decay100.00%
13683.4 secondsBeta-minus Decay100.00%
136m46.9 secondsBeta-minus Decay100.00%
13724.5 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
7.14%
1386.23 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
5.56%
1392.280 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
10.00%
1400.86 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
9.30%
1410.43 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
21.20%
142222 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission (suspected)  
No Data Available
143130 millisecondsBeta-minus Decay (suspected)No Data Available
144> 300 nanosecondsBeta-minus Decay (suspected)No Data Available
145> 407 nanoseconds   Beta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available