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Isotopes of the Element Tellurium

[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
1200.09%STABLE
1222.55%STABLE
1230.89%> 9.2×10+16 years
1244.74%STABLE
1257.07%STABLE
12618.84%STABLE
12831.74%2.41×10+24 years
13034.08%>= 3.0×10+24 years

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
1050.62 microsecondsAlpha Decay100.00%
10670 microsecondsAlpha Decay100.00%
1073.1 millisecondsAlpha Decay70.00%
Electron Capture30.00%
1082.1 secondsAlpha Decay49.00%
Electron Capture with
delayed Proton Emission
2.40%
Electron Capture51.00%
1094.6 secondsElectron Capture96.10%
Electron Capture with
delayed Proton Emission
9.40%
Alpha Decay3.90%
Electron Capture with
delayed Alpha Decay
< 5.0×10-3 %
11018.6 secondsElectron Capture100.00%
Alpha Decay~ 3.0×10-3 %
11119.3 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
1122.0 minutesElectron Capture100.00%
1131.7 minutesElectron Capture100.00%
11415.2 minutesElectron Capture100.00%
1155.8 minutesElectron Capture100.00%
115m6.7 minutesElectron Capture<= 100.00%
Isomeric TransitionNo Data Available
1162.49 hoursElectron Capture100.00%
11762 minutesElectron Capture100.00%
117m103 millisecondsIsomeric Transition100.00%
1186.00 daysElectron Capture100.00%
11916.05 hoursElectron Capture100.00%
119m4.70 daysElectron Capture100.00%
Isomeric Transition< 8.0×10-3 %
120STABLE--
12119.17 daysElectron Capture100.00%
121m164.2 daysIsomeric Transition88.60%
Electron Capture11.40%
122STABLE--
123> 9.2×10+16 yearsElectron Capture100.00%
123m119.2 daysIsomeric Transition100.00%
124STABLE--
125STABLE--
125m57.40 daysIsomeric Transition100.00%
126STABLE--
1279.35 hoursBeta-minus Decay100.00%
127m106.1 daysIsomeric Transition97.60%
Beta-minus Decay2.40%
1282.41×10+24 yearsDouble Beta-minus Decay100.00%
12969.6 minutesBeta-minus Decay100.00%
129m33.6 daysIsomeric Transition63.00%
Beta-minus Decay37.00%
130>= 3.0×10+24 years   Double Beta-minus Decay100.00%
13125.0 minutesBeta-minus Decay100.00%
131m33.25 hoursBeta-minus Decay74.10%
Isomeric Transition25.90%
131m193 millisecondsIsomeric Transition100.00%
1323.204 daysBeta-minus Decay100.00%
13312.5 minutesBeta-minus Decay100.00%
133m55.4 minutesBeta-minus Decay83.50%
Isomeric Transition16.50%
13441.8 minutesBeta-minus Decay100.00%
13519.0 secondsBeta-minus Decay100.00%
13617.63 secondsBeta-minus Decay with
delayed Neutron Emission
1.31%
Beta-minus Decay100.00%
1372.49 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
2.99%
1381.4 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
6.30%
139> 150 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
140> 300 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
141> 150 nanosecondsBeta-minus Decay (suspected)No Data Available
141m150 nanosecondsBeta-minus Decay with
delayed Neutron Emission (suspected)  
No Data Available
142No Data AvailableNo Data AvailableNo Data Available
143> 408 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus Decay with delayed
Double Neutron Emission
No Data Available