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Cesium

Isotopes of the Element Xenon

[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
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 yearsDouble 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 DecayNo 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