Nitrogen-15
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| Nitrogen-15 | |
|---|---|
| General | |
| Name, symbol | Nitrogen-15,15N |
| Neutrons | 8 |
| Protons | 7 |
| Nuclide data | |
| Natural abundance | 0.37% |
| Parent isotopes | 15O (β-) |
| Spin | ½ |
Nitrogen-15 is a stable, non-radioactive isotope of nitrogen. It is often used in agricultural and medical research. Nitrogen-15 is frequently used in nuclear magnetic resonance spectroscopy (NMR), because unlike the more abundant nitrogen-14, it has a nuclear spin of ½, which simplifies observation by NMR. Proteins can be isotopical labelled by cultivating them in a medium containing only nitrogen-15. In addition, nitrogen-15 is used to label proteins in quantitative proteomics (e.g. SILAC).
It is a product of oxygen-15 beta decay in stars.
8O15 → 7N15 + e+ + ν
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