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Hafnium

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Isotopes of the Element Tantalum

[Click for Main Data]

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
1800.01201%> 1.2×10+15 years
1800.01201%1.2×10+15 years
18199.98799%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
1552.9 millisecondsProton Emission100.00%
156144 millisecondsElectron CaptureNo Data Available
Proton Emission100.00%
156m0.36 secondsElectron Capture95.80%
Proton Emission4.20%
15710.1 millisecondsAlpha Decay96.60%
Proton Emission3.40%
157m4.3 millisecondsAlpha Decay100.00%
157m11.7 millisecondsAlpha Decay100.00%
15855 millisecondsAlpha Decay~ 91.00%
Electron Capture~ 9.00%
158m36.7 millisecondsAlpha Decay95.00%
Electron Capture5.00%
1590.83 secondsElectron Capture66.00%
Alpha Decay34.00%
159m0.56 secondsAlpha Decay55.00%
Electron Capture45.00%
1601.55 secondsElectron Capture66.00%
Alpha Decay34.00%
160m1.7 secondsNo Data AvailableNo Data Available
161No Data AvailableElectron CaptureNo Data Available
Alpha DecayNo Data Available
161m3.08 secondsElectron CaptureNo Data Available
Alpha DecayNo Data Available
1623.57 secondsElectron Capture99.93%
Alpha Decay0.07%
16310.6 secondsElectron Capture~ 99.80%
Alpha Decay~ 0.20%
16414.2 secondsElectron Capture100.00%
16531.0 secondsElectron Capture100.00%
16634.4 secondsElectron Capture100.00%
16780 secondsElectron Capture100.00%
1682.0 minutesElectron Capture100.00%
1694.9 minutesElectron Capture100.00%
1706.76 minutesElectron Capture100.00%
17123.3 minutesElectron Capture100.00%
17236.8 minutesElectron Capture100.00%
1733.14 hoursElectron Capture100.00%
1741.14 hoursElectron Capture100.00%
17510.5 hoursElectron Capture100.00%
1768.09 hoursElectron Capture100.00%
17756.56 hoursElectron Capture100.00%
1789.31 minutesElectron Capture100.00%
178m2.36 hoursElectron Capture100.00%
178m158 millisecondsIsomeric Transition100.00%
178m2290 millisecondsIsomeric Transition100.00%
1791.82 yearsElectron Capture100.00%
179m9.0 millisecondsIsomeric Transition100.00%
179m154.1 millisecondsIsomeric Transition100.00%
1808.154 hoursElectron Capture86.00%
Beta-minus Decay14.00%
180m1.2×10+15 yearsElectron Capture (suspected)No Data Available
180m1> 1.2×10+15 yearsBeta-minus Decay (suspected)No Data Available
181STABLE--
182114.74 daysBeta-minus Decay100.00%
182m283 millisecondsIsomeric Transition100.00%
182m115.84 minutesIsomeric Transition100.00%
1835.1 daysBeta-minus Decay100.00%
1848.7 hoursBeta-minus Decay100.00%
18549.4 minutesBeta-minus Decay100.00%
185m> 1 millisecondsNo Data AvailableNo Data Available
18610.5 minutesBeta-minus Decay100.00%
186m1.54 minutesBeta-minus Decay100.00%
1872.3 minutesBeta-minus Decay100.00%
187m22 secondsBeta-minus Decay (suspected)No Data Available
Isomeric Transition (suspected)No Data Available
187m1> 5 minutesBeta-minus Decay (suspected)No Data Available
187m25 minutesIsomeric Transition (suspected)No Data Available
18819.6 secondsBeta-minus DecayNo Data Available
1891.6 microsecondsBeta-minus Decay (suspected)No Data Available
1905.3 secondsBeta-minus Decay100.00%
191> 300 nanosecondsBeta-minus Decay (suspected)No Data Available
1922.2 secondsBeta-minus Decay100.00%