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Isotopes of the Element Europium

[Click for Main Data]

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

Naturally Occurring Isotopes

Mass NumberNatural AbundanceHalf-life
15147.81%>= 1.7×10+18 years

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
1300.90 millisecondsProton Emission100.00%
13117.8 millisecondsProton Emission89.00%
Electron Capture11.00%
132No Data AvailableProton EmissionNo Data Available
Electron CaptureNo Data Available
133No Data AvailableElectron Capture (suspected)No Data Available
1340.5 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
> 0.00%
1351.5 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
1363.3 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
136m3.8 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
13711 secondsElectron Capture100.00%
13812.1 secondsElectron Capture100.00%
13917.9 secondsElectron Capture100.00%
1401.51 secondsElectron Capture100.00%
140m125 millisecondsElectron Capture< 1.00%
Isomeric Transition100.00%
14140.7 secondsElectron Capture100.00%
141m2.7 secondsIsomeric Transition87.00%
Electron Capture13.00%
1422.34 secondsElectron Capture100.00%
142m1.223 minutesElectron Capture100.00%
1432.59 minutesElectron Capture100.00%
14410.2 secondsElectron Capture100.00%
1455.93 daysElectron Capture100.00%
1464.61 daysElectron Capture100.00%
14724.1 daysElectron Capture100.00%
Alpha Decay2.2×10-3 %
14854.5 daysElectron Capture100.00%
Alpha Decay9.4×10-7 %
14993.1 daysElectron Capture100.00%
15036.9 yearsElectron Capture100.00%
150m12.8 hoursBeta-minus Decay89.00%
Electron Capture11.00%
Isomeric Transition<= 5.0×10-8 %
151>= 1.7×10+18 yearsAlpha DecayNo Data Available
15213.528 yearsBeta-minus Decay27.90%
Electron Capture72.10%
152m9.3116 hoursBeta-minus Decay72.00%
Electron Capture28.00%
152m196 minutesIsomeric Transition100.00%
1548.601 yearsBeta-minus Decay99.98%
Electron Capture0.02%
154m46.3 minutesIsomeric Transition100.00%
1554.753 yearsBeta-minus Decay100.00%
15615.19 daysBeta-minus Decay100.00%
15715.18 hoursBeta-minus Decay100.00%
15845.9 minutesBeta-minus Decay100.00%
15918.1 minutesBeta-minus Decay100.00%
16038 secondsBeta-minus Decay100.00%
16126 secondsBeta-minus Decay100.00%
16210.6 secondsBeta-minus Decay100.00%
1637.7 secondsBeta-minus Decay100.00%
1644.2 secondsBeta-minus Decay100.00%
1652.3 secondsBeta-minus Decay100.00%
166No Data AvailableBeta-minus Decay (suspected)No Data Available
167No Data AvailableBeta-minus Decay (suspected)No Data Available