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It's Elemental

Isotopes of the Element Lutetium

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Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

Isotopes With A Known Natural Abundance

Mass NumberNatural AbundanceHalf-life
1762.599%3.76×10+10 years

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
15045 millisecondsProton Emission70.90%
Electron Capture29.10%
15180.6 millisecondsProton Emission63.40%
Electron Capture36.60%
1520.7 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
1530.9 secondsAlpha Decay~ 70.00%
Electron Capture~ 30.00%
154No Data AvailableNo Data AvailableNo Data Available
154m1.12 secondsElectron Capture100.00%
15568 millisecondsAlpha Decay90.00%
Electron Capture10.00%
155m138 millisecondsAlpha Decay76.00%
Electron Capture24.00%
155m12.69 millisecondsAlpha Decay100.00%
156494 millisecondsAlpha Decay~ 95.00%
Electron Capture~ 5.00%
156m198 millisecondsAlpha Decay100.00%
1576.8 secondsAlpha Decay> 0.00%
157m4.79 secondsElectron Capture94.00%
Alpha Decay6.00%
15810.6 secondsElectron Capture99.09%
Alpha Decay0.91%
15912.1 secondsElectron Capture100.00%
Alpha Decay0.10%
16036.1 secondsElectron Capture100.00%
Alpha Decay<= 1.0×10-4 %
160m40 secondsElectron Capture<= 100.00%
Alpha DecayNo Data Available
16177 secondsElectron Capture100.00%
161m7.3 millisecondsIsomeric TransitionNo Data Available
1621.37 minutesElectron Capture<= 100.00%
162m1.9 minutesElectron Capture<= 100.00%
162m11.5 minutesElectron Capture<= 100.00%
1633.97 minutesElectron Capture100.00%
1643.14 minutesElectron Capture100.00%
16510.74 minutesElectron Capture100.00%
1662.65 minutesElectron Capture100.00%
166m1.41 minutesElectron Capture58.00%
Isomeric Transition42.00%
166m12.12 minutesElectron Capture> 80.00%
Isomeric Transition< 20.00%
16751.5 minutesElectron Capture100.00%
167m>= 1 minutesIsomeric TransitionNo Data Available
Electron CaptureNo Data Available
1685.5 minutesElectron Capture100.00%
168m6.7 minutesElectron Capture> 99.60%
Isomeric Transition< 0.80%
16934.06 hoursElectron Capture100.00%
169m160 secondsIsomeric Transition100.00%
1702.012 daysElectron Capture100.00%
170m0.67 secondsIsomeric Transition100.00%
1718.24 daysElectron Capture100.00%
171m79 secondsIsomeric Transition100.00%
1726.70 daysElectron Capture100.00%
172m3.7 minutesIsomeric Transition100.00%
1731.37 yearsElectron Capture100.00%
1743.31 yearsElectron Capture100.00%
174m142 daysIsomeric Transition99.38%
Electron Capture0.62%
1763.76×10+10 yearsBeta-minus Decay100.00%
176m3.664 hoursBeta-minus Decay99.90%
Electron Capture0.09%
1776.647 daysBeta-minus Decay100.00%
177m160.44 daysIsomeric Transition21.40%
Beta-minus Decay78.60%
177m16 minutesBeta-minus Decay100.00%
Isomeric Transition (suspected)No Data Available
17828.4 minutesBeta-minus Decay100.00%
178m23.1 minutesBeta-minus Decay100.00%
1794.59 hoursBeta-minus Decay100.00%
179m3.1 millisecondsIsomeric Transition100.00%
1805.7 minutesBeta-minus Decay100.00%
1813.5 minutesBeta-minus Decay100.00%
1822.0 minutesBeta-minus Decay100.00%
18358 secondsBeta-minus Decay100.00%
18419 secondsBeta-minus Decay100.00%

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