Table 1.
Nuclei used in hyperpolarized NMR probes.
| Nucleus | Spin I | Natural Abundance | Molar Receptivity a rel. to1H |
|---|---|---|---|
| 3He | 1 | <<0.1% | 44.2% |
| 6Li | 1 | 7.6% | 0.85% |
| 13C | 1/2 | 1.1% | 1.59% |
| 15N | 1/2 | 0.4% | 0.10% |
| 19F | 1/2 | 100% | 83.3% |
| 29Si | 1/2 | 4.7% | 0.08% |
| 89Y | 1/2 | 100% | 0.01% |
| 107Ag | 1/2 | 51.8% | <0.01% |
| 109Ag | 1/2 | 48.2% | 0.01% |
| 129Xe | 1/2 | 26.4% | 2.16% |
a
NMR signal detection in a coil by Faraday induction is proportional to a factor |γ3|I(I+1) where γ is the magnetogyric ratio; the molar receptivity thus describes the NMR signal generated by identical amounts of nuclear isotopes (i.e., enriched to 100%) relative to 1H [30].