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Isotopes of the Element Strontium

[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
840.56%STABLE
869.86%STABLE
877.00%STABLE
8882.58%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
73> 25 millisecondsElectron Capture with
delayed Proton Emission
> 0.00%
Electron Capture100.00%
74> 1.2 microsecondsElectron CaptureNo Data Available
7588 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
5.20%
767.89 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
3.4×10-5 %
779.0 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
< 0.25%
78160 secondsElectron Capture100.00%
792.25 minutesElectron Capture100.00%
80106.3 minutesElectron Capture100.00%
8122.3 minutesElectron Capture100.00%
8225.34 daysElectron Capture100.00%
8332.41 hoursElectron Capture100.00%
83m4.95 secondsIsomeric Transition100.00%
84STABLE--
8564.850 daysElectron Capture100.00%
85m67.63 minutesIsomeric Transition86.60%
Electron Capture13.40%
86STABLE--
87STABLE--
87m2.815 hoursElectron Capture0.30%
Isomeric Transition99.70%
88STABLE--
8950.53 daysBeta-minus Decay100.00%
9028.90 yearsBeta-minus Decay100.00%
919.63 hoursBeta-minus Decay100.00%
922.66 hoursBeta-minus Decay100.00%
937.43 minutesBeta-minus Decay100.00%
9475.3 secondsBeta-minus Decay100.00%
9523.90 secondsBeta-minus Decay100.00%
961.07 secondsBeta-minus Decay100.00%
97429 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
<= 0.05%
980.653 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.25%
990.269 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.10%
100202 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.78%
101118 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
2.37%
10269 millisecondsBeta-minus Decay with
delayed Neutron Emission
5.50%
Beta-minus Decay100.00%
10368 millisecondsBeta-minus DecayNo Data Available
10443 millisecondsBeta-minus DecayNo Data Available
10540 millisecondsBeta-minus DecayNo Data Available
106> 392 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
107> 395 nanoseconds   Beta-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