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Isotopes of the Element Thulium

[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
169100%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
1441.9 microsecondsProton Emission> 0.00%
1453.17 microsecondsProton Emission100.00%
14680 millisecondsElectron CaptureNo Data Available
Proton EmissionNo Data Available
146m200 millisecondsProton EmissionNo Data Available
Electron CaptureNo Data Available
1470.58 secondsElectron Capture85.00%
Proton Emission15.00%
147m0.36 millisecondsProton Emission100.00%
1480.7 secondsElectron Capture100.00%
1490.9 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
0.20%
1502.20 secondsElectron Capture100.00%
150m5.2 millisecondsIsomeric Transition100.00%
1514.17 secondsElectron Capture100.00%
151m6.6 secondsElectron Capture100.00%
1528.0 secondsElectron Capture100.00%
152m5.2 secondsElectron Capture100.00%
1531.48 secondsAlpha Decay91.00%
Electron Capture9.00%
153m2.5 secondsAlpha Decay92.00%
Electron Capture8.00%
1548.1 secondsAlpha Decay54.00%
Electron Capture46.00%
154m3.30 secondsElectron Capture42.00%
Isomeric TransitionNo Data Available
Alpha Decay58.00%
15521.6 secondsElectron Capture99.11%
Alpha Decay0.89%
155m45 secondsElectron Capture> 98.00%
Alpha Decay< 2.00%
15683.8 secondsElectron Capture99.94%
Alpha Decay0.06%
1573.63 minutesElectron Capture100.00%
1583.98 minutesElectron Capture100.00%
158m20 secondsElectron Capture (suspected)No Data Available
1599.13 minutesElectron Capture100.00%
1609.4 minutesElectron Capture100.00%
160m74.5 secondsIsomeric Transition85.00%
Electron Capture15.00%
16130.2 minutesElectron Capture100.00%
16221.70 minutesElectron Capture100.00%
162m24.3 secondsIsomeric Transition81.00%
Electron Capture19.00%
1631.810 hoursElectron Capture100.00%
1642.0 minutesElectron Capture100.00%
164m5.1 minutesIsomeric Transition~ 80.00%
Electron Capture~ 20.00%
16530.06 hoursElectron Capture100.00%
1667.70 hoursElectron Capture100.00%
166m340 millisecondsIsomeric Transition100.00%
1679.25 daysElectron Capture100.00%
16893.1 daysElectron Capture99.99%
Beta-minus Decay0.01%
169STABLE--
170128.6 daysBeta-minus Decay99.87%
Electron Capture0.13%
1711.92 yearsBeta-minus Decay100.00%
17263.6 hoursBeta-minus Decay100.00%
1738.24 hoursBeta-minus Decay100.00%
1745.4 minutesBeta-minus Decay100.00%
174m2.29 secondsIsomeric Transition99.00%
Beta-minus Decay< 1.00%
17515.2 minutesBeta-minus Decay100.00%
1761.9 minutesBeta-minus Decay100.00%
17790 secondsBeta-minus Decay100.00%
178> 300 nanoseconds   Beta-minus DecayNo Data Available
179No Data AvailableBeta-minus Decay (suspected)   No Data Available