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Praseodymium

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The Periodic Table of Elements

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Promethium

Isotopes of the Element Neodymium

[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
14227.152%STABLE
14312.174%STABLE
14423.798%2.29×10+15 years
1458.293%STABLE
14617.189%STABLE
1485.756%STABLE
1505.638%0.79×1019 years

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
124No Data AvailableElectron Capture (suspected)No Data Available
1250.65 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
> 0.00%
126> 200 nanosecondsElectron CaptureNo Data Available
Electron Capture with
delayed Proton Emission
No Data Available
1271.8 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
1285 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
1294.9 secondsElectron Capture> 0.00%
Electron Capture with
delayed Proton Emission
> 0.00%
13021 secondsElectron Capture100.00%
13125.4 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
> 0.00%
13294 secondsElectron Capture100.00%
13370 secondsElectron Capture100.00%
133m≈ 70 secondsElectron CaptureNo Data Available
Isomeric TransitionNo Data Available
1348.5 minutesElectron Capture100.00%
13512.4 minutesElectron Capture100.00%
135m5.5 minutesElectron Capture> 99.97%
Isomeric Transition< 0.03%
13650.65 minutesElectron Capture100.00%
13738.5 minutesElectron Capture100.00%
137m1.60 secondsIsomeric Transition100.00%
1385.04 hoursElectron Capture100.00%
13929.7 minutesElectron Capture100.00%
139m5.50 hoursElectron Capture88.20%
Isomeric Transition11.80%
1403.37 daysElectron Capture100.00%
140m0.60 millisecondsIsomeric Transition100.00%
1412.49 hoursElectron Capture100.00%
141m62.0 secondsIsomeric Transition100.00%
Electron Capture< 0.05%
142STABLE--
143STABLE--
1442.29×10+15 yearsAlpha Decay100.00%
145STABLE--
146STABLE--
14710.98 daysBeta-minus Decay100.00%
148STABLE--
1491.728 hoursBeta-minus Decay100.00%
1500.79×1019 yearsNo Data AvailableNo Data Available
15112.44 minutesBeta-minus Decay100.00%
15211.4 minutesBeta-minus Decay100.00%
15331.6 secondsBeta-minus Decay100.00%
15425.9 secondsBeta-minus Decay100.00%
1558.9 secondsBeta-minus Decay100.00%
1565.06 secondsBeta-minus Decay100.00%
157> 100 nanosecondsBeta-minus Decay (suspected)No Data Available
158> 50 nanosecondsBeta-minus Decay100.00%
159No Data AvailableBeta-minus Decay (suspected)No Data Available
160No Data AvailableBeta-minus Decay (suspected)No Data Available
161No Data AvailableBeta-minus Decay (suspected)No Data Available