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Isotopes of the Element Erbium

[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
1620.139%STABLE
1641.601%STABLE
16633.503%STABLE
16722.869%STABLE
16826.978%STABLE
17014.910%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
142No Data AvailableNo Data AvailableNo Data Available
143No Data AvailableElectron Capture (suspected)No Data Available
144>= 200 nanoseconds   Electron Capture100.00%
145No Data AvailableElectron Capture (suspected)No Data Available
145m1.0 secondsElectron Capture with
delayed Proton Emission
No Data Available
Electron Capture100.00%
1461.7 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
100.00%
1472.5 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
> 0.00%
147m1.6 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
> 0.00%
1484.6 secondsElectron Capture100.00%
1494 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
7.00%
149m8.9 secondsIsomeric Transition3.50%
Electron Capture with
delayed Proton Emission
0.18%
Electron Capture96.50%
15018.5 secondsElectron Capture100.00%
15123.5 secondsElectron Capture100.00%
151m0.58 secondsIsomeric Transition95.30%
Electron Capture4.70%
15210.3 secondsAlpha Decay90.00%
Electron Capture10.00%
15337.1 secondsAlpha Decay53.00%
Electron Capture47.00%
1543.73 minutesElectron Capture99.53%
Alpha Decay0.47%
1555.3 minutesElectron Capture99.98%
Alpha Decay0.02%
15619.5 minutesElectron Capture100.00%
Alpha Decay1.7×10-5 %
15718.65 minutesElectron Capture100.00%
157m76 millisecondsIsomeric Transition100.00%
1582.29 hoursElectron Capture100.00%
15936 minutesElectron Capture100.00%
16028.58 hoursElectron Capture100.00%
1613.21 hoursElectron Capture100.00%
162STABLE--
16375.0 minutesElectron Capture100.00%
164STABLE--
16510.36 hoursElectron Capture100.00%
166STABLE--
167STABLE--
167m2.269 secondsIsomeric Transition100.00%
168STABLE--
1699.392 daysBeta-minus Decay100.00%
170STABLE--
1717.516 hoursBeta-minus Decay100.00%
17249.3 hoursBeta-minus Decay100.00%
1731.4 minutesBeta-minus Decay100.00%
1743.2 minutesBeta-minus Decay100.00%
1751.2 minutesBeta-minus Decay100.00%
176No Data AvailableBeta-minus Decay (suspected)No Data Available
177No Data AvailableBeta-minus Decay (suspected)   No Data Available