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Isotopes of the Element Hafnium

[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
1740.16%2.0×10+15 years
1765.26%STABLE
17718.60%STABLE
17827.28%STABLE
17913.62%STABLE
18035.08%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
15360 nanosecondsElectron Capture (suspected)   No Data Available
1542 secondsElectron Capture100.00%
Alpha Decay (suspected)No Data Available
1550.84 secondsElectron Capture100.00%
15623 millisecondsAlpha Decay100.00%
156m0.52 millisecondsAlpha Decay100.00%
157110 millisecondsAlpha Decay86.00%
Electron Capture14.00%
1582.85 secondsAlpha Decay44.30%
Electron Capture55.70%
1595.6 secondsElectron Capture65.00%
Alpha Decay35.00%
16013.6 secondsElectron Capture99.30%
Alpha Decay0.70%
16118.2 secondsElectron Capture> 99.87%
Alpha Decay< 0.13%
16239.4 secondsElectron Capture99.99%
Alpha Decay8.0×10-3 %
16340.0 secondsElectron Capture100.00%
Alpha Decay< 1.0×10-4 %
164111 secondsElectron Capture100.00%
16576 secondsElectron Capture100.00%
1666.77 minutesElectron Capture100.00%
1672.05 minutesElectron Capture100.00%
16825.95 minutesElectron Capture100.00%
1693.24 minutesElectron Capture100.00%
17016.01 hoursElectron Capture100.00%
17112.1 hoursElectron Capture100.00%
171m29.5 secondsIsomeric Transition<= 100.00%
Electron CaptureNo Data Available
1721.87 yearsElectron Capture100.00%
17323.6 hoursElectron Capture100.00%
1742.0×10+15 yearsAlpha Decay100.00%
17570 daysElectron Capture100.00%
176STABLE--
177STABLE--
177m1.09 secondsIsomeric Transition100.00%
177m151.4 minutesIsomeric Transition100.00%
178STABLE--
178m4.0 secondsIsomeric Transition100.00%
178m131 yearsIsomeric Transition100.00%
179STABLE--
179m18.67 secondsIsomeric Transition100.00%
179m125.05 daysIsomeric Transition100.00%
180STABLE--
180m5.47 hoursIsomeric Transition99.70%
Beta-minus Decay0.30%
18142.39 daysBeta-minus Decay100.00%
181m1.5 millisecondsIsomeric Transition100.00%
1828.90×10+6 yearsBeta-minus Decay100.00%
182m61.5 minutesBeta-minus Decay54.00%
Isomeric Transition46.00%
1831.018 hoursBeta-minus Decay100.00%
1844.12 hoursBeta-minus Decay100.00%
184m48 secondsIsomeric Transition100.00%
1853.5 minutesBeta-minus Decay100.00%
1862.6 minutesBeta-minus Decay100.00%
1870.27 microsecondsBeta-minus Decay100.00%
188No Data AvailableBeta-minus DecayNo Data Available
189No Data Available   No Data AvailableNo Data Available