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Isotopes of the Element Yttrium

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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.

Naturally Occurring Isotopes

Mass NumberNatural AbundanceHalf-life
89100%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
76> 200 nanosecondsProton EmissionNo Data Available
Electron CaptureNo Data Available
7757 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
Proton EmissionNo Data Available
7853 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
78m5.8 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
7914.8 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
8030.1 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
80m4.8 secondsIsomeric Transition81.00%
Electron Capture19.00%
8170.4 secondsElectron Capture100.00%
828.30 secondsElectron Capture100.00%
837.08 minutesElectron Capture100.00%
83m2.85 minutesElectron Capture60.00%
Isomeric Transition40.00%
8439.5 minutesElectron Capture100.00%
84m4.6 secondsElectron Capture100.00%
852.68 hoursElectron Capture100.00%
85m4.86 hoursElectron Capture100.00%
Isomeric Transition< 2.0×10-3 %
8614.74 hoursElectron Capture100.00%
86m48 minutesIsomeric Transition99.31%
Electron Capture0.69%
8779.8 hoursElectron Capture100.00%
87m13.37 hoursIsomeric Transition98.43%
Electron Capture1.57%
88106.626 daysElectron Capture100.00%
89STABLE--
89m15.663 secondsIsomeric Transition100.00%
9064.053 hoursBeta-minus Decay100.00%
90m3.19 hoursIsomeric Transition100.00%
Beta-minus Decay1.8×10-3 %
9158.51 daysBeta-minus Decay100.00%
91m49.71 minutesIsomeric Transition100.00%
Beta-minus Decay< 1.50%
923.54 hoursBeta-minus Decay100.00%
9310.18 hoursBeta-minus Decay100.00%
93m0.82 secondsIsomeric Transition100.00%
9418.7 minutesBeta-minus Decay100.00%
9510.3 minutesBeta-minus Decay100.00%
965.34 secondsBeta-minus Decay100.00%
96m9.6 secondsBeta-minus Decay100.00%
973.75 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.06%
97m1.17 secondsBeta-minus Decay> 99.30%
Isomeric Transition< 0.70%
Beta-minus Decay with
delayed Neutron Emission
< 0.08%
97m1142 millisecondsIsomeric Transition98.40%
Beta-minus Decay1.60%
980.548 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.33%
98m2.0 secondsBeta-minus Decay> 80.00%
Isomeric Transition< 20.00%
Beta-minus Decay with
delayed Neutron Emission
3.40%
991.484 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
1.70%
100735 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.92%
100m0.94 secondsBeta-minus Decay100.00%
1010.45 secondsBeta-minus Decay with
delayed Neutron Emission
1.94%
Beta-minus Decay100.00%
1020.36 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
4.90%
102m0.298 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
4.90%
1030.23 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
8.00%
104197 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
No Data Available
10585 millisecondsBeta-minus Decay with
delayed Neutron Emission
< 82.00%
Beta-minus DecayNo Data Available
10662 millisecondsBeta-minus DecayNo Data Available
10741 millisecondsBeta-minus Decay100.00%
10825 millisecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
109> 393 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus Decay with delayed
Double Neutron Emission
No Data Available