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Isotopes of the Element Europium

[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
15147.81%>= 1.7×10+18 years
15352.19%STABLE

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
0.09%
136m3.8 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
0.09%
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 years   Alpha 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%
153STABLE--
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