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Isotopes of the Element Lead

[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
2041.4%>= 1.4×10+17 years
20624.1%STABLE
20722.1%STABLE
20852.4%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
1780.12 millisecondsAlpha Decay100.00%
1793.5 millisecondsAlpha Decay100.00%
1804.2 millisecondsAlpha Decay100.00%
18136 millisecondsAlpha Decay100.00%
181m45 millisecondsAlpha Decay< 100.00%
18255 millisecondsElectron Capture~ 2.00%
Alpha Decay~ 98.00%
183535 millisecondsAlpha Decay~ 90.00%
183m415 millisecondsAlpha Decay100.00%
184490 millisecondsAlpha Decay80.00%
Electron Capture20.00%
1856.3 secondsElectron CaptureNo Data Available
Alpha Decay34.00%
185m4.3 secondsAlpha Decay50.00%
Electron CaptureNo Data Available
1864.82 secondsElectron Capture60.00%
Alpha Decay40.00%
18718.3 secondsElectron Capture88.00%
Alpha Decay12.00%
187m15.2 secondsElectron Capture90.50%
Alpha Decay9.50%
18825.1 secondsElectron Capture90.70%
Alpha Decay9.30%
18939 secondsElectron Capture100.00%
Alpha Decay< 1.00%
189m50 secondsElectron Capture100.00%
Alpha Decay< 1.00%
19071 secondsAlpha Decay0.40%
Electron Capture99.60%
1911.33 minutesElectron Capture99.99%
Alpha Decay0.01%
191m2.18 minutesElectron Capture100.00%
Alpha Decay~ 0.02%
1923.5 minutesElectron Capture99.99%
Alpha Decay5.9×10-3 %
193No Data AvailableElectron CaptureNo Data Available
193m5.8 minutesElectron Capture100.00%
19410.7 minutesAlpha Decay7.3×10-6 %
Electron Capture100.00%
195≈ 15 minutesElectron Capture100.00%
195m15.0 minutesElectron Capture100.00%
19637 minutesElectron CaptureNo Data Available
Alpha Decay<= 3.0×10-5 %
1978.1 minutesElectron Capture100.00%
197m42.9 minutesElectron Capture81.00%
Isomeric Transition19.00%
1982.4 hoursElectron Capture100.00%
19990 minutesElectron Capture100.00%
199m12.2 minutesElectron Capture~ 7.00%
Isomeric Transition~ 93.00%
20021.5 hoursElectron Capture100.00%
2019.33 hoursElectron Capture100.00%
201m60.8 secondsIsomeric Transition100.00%
20252.5×10+3 yearsElectron Capture100.00%
202m3.54 hoursIsomeric Transition90.50%
Electron Capture9.50%
20351.92 hoursElectron Capture100.00%
203m6.21 secondsIsomeric Transition100.00%
203m1480 millisecondsIsomeric Transition100.00%
204>= 1.4×10+17 yearsAlpha DecayNo Data Available
204m66.93 minutesIsomeric Transition100.00%
2051.73×10+7 yearsElectron Capture100.00%
205m5.55 millisecondsIsomeric Transition100.00%
206STABLE--
207STABLE--
207m0.806 secondsIsomeric Transition100.00%
208STABLE--
2093.253 hoursBeta-minus Decay100.00%
21022.20 yearsBeta-minus Decay100.00%
Alpha Decay1.9×10-6 %
21136.1 minutesBeta-minus Decay100.00%
21210.64 hoursBeta-minus Decay100.00%
21310.2 minutesBeta-minus Decay100.00%
21426.8 minutesBeta-minus Decay100.00%
215147 secondsBeta-minus DecayNo Data Available
216> 300 nanosecondsBeta-minus DecayNo Data Available
217> 300 nanosecondsBeta-minus DecayNo Data Available
218> 300 nanosecondsBeta-minus DecayNo Data Available
219> 300 nanosecondsBeta-minus DecayNo Data Available
220> 300 nanoseconds     Beta-minus Decay       No Data Available