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Isotopes of the Element Xenon

[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
1240.0952%>= 1.6×10+14 years
1260.0890%STABLE
1281.9102%STABLE
12926.4006%STABLE
1304.0710%STABLE
13121.232%STABLE
13226.9086%STABLE
13410.4357%> 5.8×10+22 years
1368.8573%> 2.4×10+21 years

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
108No Data AvailableNo Data AvailableNo Data Available
10913 millisecondsAlpha Decay100.00%
11093 millisecondsElectron CaptureNo Data Available
Electron Capture with
delayed Proton Emission
No Data Available
Alpha Decay64.00%
1110.81 secondsElectron Capture90.00%
Alpha Decay10.00%
1122.7 secondsElectron Capture99.16%
Alpha Decay0.84%
1132.74 secondsElectron CaptureNo Data Available
Electron Capture with
delayed Proton Emission
7.00%
Alpha Decay~ 0.01%
Electron Capture with
delayed Alpha Decay
~ 7.0×10-3 %
11410.0 secondsElectron Capture100.00%
11518 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
0.34%
Alpha Decay3.0×10-4 %
11659 secondsElectron Capture100.00%
11761 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
2.9×10-3 %
1183.8 minutesElectron Capture100.00%
1195.8 minutesElectron Capture100.00%
12040 minutesElectron Capture100.00%
12140.1 minutesElectron Capture100.00%
12220.1 hoursElectron Capture100.00%
1232.08 hoursElectron Capture100.00%
124>= 1.6×10+14 years   Double Electron CaptureNo Data Available
12516.9 hoursElectron Capture100.00%
125m57 secondsIsomeric Transition100.00%
126STABLE--
12736.346 daysElectron Capture100.00%
127m69.2 secondsIsomeric Transition100.00%
128STABLE--
129STABLE--
129m8.88 daysIsomeric Transition100.00%
130STABLE--
131STABLE--
131m11.84 daysIsomeric Transition100.00%
132STABLE--
132m8.39 millisecondsIsomeric Transition100.00%
1335.2475 daysBeta-minus Decay100.00%
133m2.198 daysIsomeric Transition100.00%
134> 5.8×10+22 yearsDouble Beta-minus DecayNo Data Available
134m290 millisecondsIsomeric Transition100.00%
1359.14 hoursBeta-minus Decay100.00%
135m15.29 minutesIsomeric Transition> 99.40%
Beta-minus Decay< 0.60%
136> 2.4×10+21 yearsDouble Beta-minus Decay   No Data Available
1373.818 minutesBeta-minus Decay100.00%
13814.08 minutesBeta-minus Decay100.00%
13939.68 secondsBeta-minus Decay100.00%
14013.60 secondsBeta-minus Decay100.00%
1411.73 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.04%
1421.23 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.21%
1430.511 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
1.00%
1440.388 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
3.00%
145188 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
5.00%
146146 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
6.90%
1470.10 secondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
< 8.00%
148> 408 nanosecondsBeta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus DecayNo Data Available