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Isotopes of the Element Rubidium

[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
8572.17%STABLE
8727.83%4.81×10+10 years

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
71No Data AvailableProton Emission (suspected)No Data Available
721.2 microsecondsProton Emission (suspected)No Data Available
7330 nanosecondsElectron Capture (suspected)No Data Available
73m< 30 nanosecondsProton Emission> 0.00%
7464.9 millisecondsElectron Capture100.00%
7519.0 secondsElectron Capture100.00%
7636.5 secondsElectron Capture100.00%
Electron Capture with
delayed Alpha Decay
3.8×10-7 %
773.77 minutesElectron Capture100.00%
7817.66 minutesElectron Capture100.00%
78m5.74 minutesIsomeric Transition9.00%
Electron Capture91.00%
7922.9 minutesElectron Capture100.00%
8033.4 secondsElectron Capture100.00%
814.572 hoursElectron Capture100.00%
81m30.5 minutesIsomeric Transition97.60%
Electron Capture2.40%
821.2575 minutesElectron Capture100.00%
82m6.472 hoursElectron Capture100.00%
Isomeric Transition< 0.33%
8386.2 daysElectron Capture100.00%
8432.82 daysBeta-minus Decay3.90%
Electron Capture96.10%
84m20.26 minutesIsomeric Transition100.00%
85STABLE--
8618.642 daysBeta-minus Decay99.99%
Electron Capture5.2×10-3 %
86m1.017 minutesIsomeric Transition100.00%
Beta-minus Decay< 0.30%
874.81×10+10 yearsBeta-minus Decay100.00%
8817.773 minutesBeta-minus Decay100.00%
8915.15 minutesBeta-minus Decay100.00%
90158 secondsBeta-minus Decay100.00%
90m258 secondsBeta-minus Decay97.40%
Isomeric Transition2.60%
9158.4 secondsBeta-minus Decay100.00%
924.492 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.01%
935.84 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
1.39%
942.702 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
10.50%
95377.7 millisecondsBeta-minus Decay with
delayed Neutron Emission
8.70%
Beta-minus Decay100.00%
96203 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
13.30%
97169.1 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
25.50%
98102 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
13.80%
Beta-minus Decay with delayed
Double Neutron Emission
0.05%
98m96 millisecondsBeta-minus Decay100.00%
9954 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
15.80%
10051 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
6.00%
Beta-minus Decay with delayed  
Double Neutron Emission
0.16%
10132 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
28.00%
10237 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
18.00%
103> 633 nanoseconds   Beta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available