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Isotopes of the Element Tungsten

[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
1800.12%>= 6.6×10+17 years
18226.50%STABLE
18314.31%> 1.3×10+19 years
18430.64%STABLE
18628.43%> 2.3×10+19 years

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
157275 millisecondsElectron CaptureNo Data Available
1581.25 millisecondsAlpha Decay100.00%
158m0.143 millisecondsIsomeric TransitionNo Data Available
Alpha DecayNo Data Available
1597.3 millisecondsAlpha Decay~ 99.90%
Electron Capture~ 0.10%
16091 millisecondsAlpha Decay87.00%
161409 millisecondsAlpha Decay73.00%
Electron Capture27.00%
1621.36 secondsElectron Capture54.80%
Alpha Decay45.20%
1632.67 secondsElectron Capture86.00%
Alpha Decay14.00%
1646.3 secondsElectron Capture96.20%
Alpha Decay3.80%
1655.1 secondsElectron Capture100.00%
Alpha Decay< 0.20%
16619.2 secondsElectron Capture99.96%
Alpha Decay0.04%
16719.9 secondsElectron Capture99.96%
Alpha Decay0.04%
16850.9 secondsElectron Capture100.00%
Alpha Decay3.2×10-3 %
16974 secondsElectron Capture100.00%
1702.42 minutesElectron Capture100.00%
1712.38 minutesElectron Capture100.00%
1726.6 minutesElectron Capture100.00%
1737.6 minutesElectron Capture100.00%
17433.2 minutesElectron Capture100.00%
17535.2 minutesElectron Capture100.00%
1762.5 hoursElectron Capture100.00%
177132 minutesElectron Capture100.00%
17821.6 daysElectron Capture100.00%
17937.05 minutesElectron Capture100.00%
179m6.40 minutesIsomeric Transition99.71%
Electron Capture0.29%
180>= 6.6×10+17 years   Double Electron Capture100.00%
181121.2 daysElectron Capture100.00%
182STABLE--
183> 1.3×10+19 yearsAlpha DecayNo Data Available
183m5.2 secondsIsomeric Transition100.00%
184STABLE--
18575.1 daysBeta-minus Decay100.00%
185m1.67 minutesIsomeric Transition100.00%
186> 2.3×10+19 yearsDouble Beta-minus DecayNo Data Available
186m> 3 millisecondsIsomeric TransitionNo Data Available
18724.000 hoursBeta-minus Decay100.00%
18869.78 daysBeta-minus Decay100.00%
18910.7 minutesBeta-minus Decay100.00%
19030.0 minutesBeta-minus Decay100.00%
190m<= 3.1 millisecondsIsomeric Transition100.00%
191> 300 nanosecondsBeta-minus Decay (suspected)No Data Available
192No Data AvailableBeta-minus Decay (suspected)No Data Available
193> 300 nanosecondsBeta-minus Decay (suspected)No Data Available
194> 300 nanosecondsBeta-minus Decay (suspected)   No Data Available