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Isotopes of the Element Barium

[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
1300.106%STABLE
1320.101%> 3.0×10+21 years
1342.417%STABLE
1356.592%STABLE
1367.854%STABLE
13711.232%STABLE
13871.698%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
112No Data AvailableNo Data AvailableNo Data Available
113No Data AvailableNo Data AvailableNo Data Available
1140.43 secondsEmission of a carbon-12 nucleus< 0.0034%
Electron Capture99.10%
Electron Capture with
delayed Proton Emission
20.00%
Alpha Decay0.90%
1150.45 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
> 15.00%
1161.3 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
3.00%
1171.75 secondsElectron Capture100.00%
Electron Capture with
delayed Alpha Decay
> 0.00%
Electron Capture with
delayed Proton Emission
> 0.00%
1185.5 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
1195.4 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
< 25.00%
12024 secondsElectron Capture100.00%
12129.7 secondsElectron Capture100.00%
1221.95 minutesElectron Capture100.00%
1232.7 minutesElectron Capture100.00%
12411.0 minutesElectron Capture100.00%
1253.3 minutesElectron Capture100.00%
126100 minutesElectron Capture100.00%
12712.7 minutesElectron Capture100.00%
127m1.9 secondsIsomeric Transition100.00%
1282.43 daysElectron Capture100.00%
1292.23 hoursElectron Capture100.00%
129m2.16 hoursElectron Capture<= 100.00%
Isomeric TransitionNo Data Available
130STABLE--
130m9.4 millisecondsIsomeric Transition100.00%
13111.50 daysElectron Capture100.00%
131m14.6 minutesIsomeric Transition100.00%
132> 3.0×10+21 yearsDouble Electron CaptureNo Data Available
13310.551 yearsElectron Capture100.00%
133m38.93 hoursElectron Capture0.01%
Isomeric Transition99.99%
134STABLE--
135STABLE--
135m28.7 hoursIsomeric Transition100.00%
136STABLE--
136m0.3084 secondsIsomeric Transition100.00%
137STABLE--
137m2.552 minutesIsomeric Transition100.00%
138STABLE--
13983.06 minutesBeta-minus Decay100.00%
14012.7527 daysBeta-minus Decay100.00%
14118.27 minutesBeta-minus Decay100.00%
14210.6 minutesBeta-minus Decay100.00%
14314.5 secondsBeta-minus Decay100.00%
14411.5 secondsBeta-minus Decay100.00%
1454.31 secondsBeta-minus Decay100.00%
1462.22 secondsBeta-minus Decay100.00%
1470.894 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.06%
1480.612 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.40%
1490.344 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.43%
1500.3 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
No Data Available
151> 300 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
152> 406 nanoseconds   Beta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
153No Data AvailableBeta-minus Decay (suspected)No Data Available