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|
| Isotopes of Neptunium |
 Notes
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| Neptunium has no stable isotopes. |
 Notable Isotopes
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|
 235Np [142 neutrons] |
|
 Abundance: synthetic
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| Half life: 396.1 days [ Alpha Decay ]
|
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| Decay Energy: 5.192MeV |
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| Decays to 231Pa.
|
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| Half life: 396.1 days [ Electron Capture ]
|
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| Decay Energy: 0.124MeV |
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| Decays to 235U.
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| 236Np [143 neutrons] |
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| Abundance: synthetic
|
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| Half life: 154 x 103 years [ Electron Capture ]
|
|
| Decay Energy: 0.940MeV |
|
| Decays to 236U.
|
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| Half life: 154 x 103 years [ beta- ]
|
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| Decay Energy: 0.940MeV |
|
| Decays to 236Pu.
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| Half life: 154 x 103 years [ Alpha Decay ]
|
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| Decay Energy: 5.020MeV |
|
| Decays to 232Pa.
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| 237Np [144 neutrons] |
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| Abundance: synthetic
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| Half life: 2.144 x 106 years
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| Decay Energy: 4.959MeV |
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| Decays to 232Pa.
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