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Isotopes of the Element Gold

[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
197100%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
169No Data AvailableProton Emission (suspected)No Data Available
Alpha Decay (suspected)No Data Available
170286 microsecondsProton Emission89.00%
Alpha Decay11.00%
170m617 microsecondsProton Emission58.00%
Alpha Decay42.00%
17117 microsecondsProton Emission100.00%
Alpha DecayNo Data Available
171m1.02 millisecondsAlpha Decay54.00%
Proton Emission46.00%
17222 millisecondsAlpha Decay100.00%
Electron CaptureNo Data Available
Proton EmissionNo Data Available
172m7.7 millisecondsAlpha Decay100.00%
Proton Emission< 0.02%
Electron CaptureNo Data Available
17325 millisecondsAlpha Decay94.00%
Electron CaptureNo Data Available
Proton EmissionNo Data Available
173m14.0 millisecondsAlpha Decay92.00%
Proton EmissionNo Data Available
Electron CaptureNo Data Available
174139 millisecondsAlpha Decay> 0.00%
175No Data AvailableElectron Capture (suspected)   No Data Available
Alpha Decay (suspected)No Data Available
175m156 millisecondsAlpha Decay94.00%
Electron Capture6.00%
176No Data AvailableNo Data AvailableNo Data Available
176m1.05 secondsAlpha DecayNo Data Available
Electron CaptureNo Data Available
176m11.36 secondsNo Data AvailableNo Data Available
1771.53 secondsAlpha Decay40.00%
Electron CaptureNo Data Available
177m1.00 secondsAlpha Decay66.00%
Electron CaptureNo Data Available
1782.6 secondsElectron Capture<= 60.00%
Alpha Decay>= 40.00%
1797.1 secondsElectron Capture78.00%
Alpha Decay22.00%
1808.1 secondsAlpha Decay>= 1.80%
Electron Capture<= 98.20%
18113.7 secondsElectron Capture97.30%
Alpha Decay2.70%
18215.5 secondsElectron Capture99.87%
Alpha Decay0.13%
18342.8 secondsElectron Capture99.45%
Alpha Decay0.55%
18420.6 secondsElectron Capture100.00%
Alpha Decay<= 0.02%
184m47.6 secondsAlpha Decay<= 0.02%
Electron Capture70.00%
Isomeric Transition30.00%
1854.25 minutesElectron Capture99.74%
Alpha Decay0.26%
185m6.8 minutesElectron Capture< 100.00%
Isomeric TransitionNo Data Available
18610.7 minutesElectron Capture100.00%
Alpha Decay8.0×10-4 %
1878.3 minutesElectron Capture100.00%
Alpha Decay3.0×10-3 %
187m2.3 secondsIsomeric Transition100.00%
1888.84 minutesElectron Capture100.00%
18928.7 minutesElectron Capture100.00%
Alpha Decay< 3.0×10-5 %
189m4.59 minutesElectron Capture100.00%
19042.8 minutesElectron Capture100.00%
Alpha Decay< 1.0×10-6 %
190m125 millisecondsIsomeric Transition100.00%
1913.18 hoursElectron Capture100.00%
191m0.92 secondsIsomeric Transition100.00%
1924.94 hoursElectron Capture100.00%
192m29 millisecondsIsomeric Transition100.00%
192m1160 millisecondsIsomeric Transition100.00%
19317.65 hoursElectron Capture100.00%
193m3.9 secondsIsomeric Transition99.97%
Electron Capture~ 0.03%
19438.02 hoursElectron Capture100.00%
194m600 millisecondsIsomeric Transition100.00%
194m1420 millisecondsIsomeric Transition100.00%
195186.098 daysElectron Capture100.00%
195m30.5 secondsIsomeric Transition100.00%
1966.1669 daysElectron Capture93.00%
Beta-minus Decay7.00%
196m8.1 secondsIsomeric Transition100.00%
196m19.6 hoursIsomeric Transition100.00%
197STABLE--
197m7.73 secondsIsomeric Transition100.00%
1982.6948 daysBeta-minus Decay100.00%
198m2.272 daysIsomeric Transition100.00%
1993.139 daysBeta-minus Decay100.00%
199m0.44 millisecondsIsomeric Transition100.00%
20048.4 minutesBeta-minus Decay100.00%
200m18.7 hoursIsomeric Transition16.00%
Beta-minus Decay84.00%
20126.0 minutesBeta-minus Decay100.00%
20228.4 secondsBeta-minus Decay100.00%
20360 secondsBeta-minus Decay100.00%
20439.8 secondsBeta-minus Decay100.00%
20532.5 secondsBeta-minus Decay100.00%
205m6 secondsBeta-minus DecayNo Data Available
Isomeric TransitionNo Data Available
206> 300 nanosecondsBeta-minus DecayNo Data Available
207> 300 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
208> 300 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
209> 300 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
210> 300 nanoseconds   Beta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available