Abstract
The magnetic moments of nuclei in normal matter will result in a nuclear paramagnetic polarization upon establishment of equilibrium in a constant magnetic field. It is shown that a radiofrequency field at right angles to the constant field causes a forced precession of the total polarization around the constant field with decreasing latitude as the Larmor frequency approaches adiabatically the frequency of the r-f field. Thus there results a component of the nuclear polarization at right angles to both the constant and the r-f field and it is shown that under normal laboratory conditions this component can induce observable voltages. In Section 3 we discuss this nuclear induction, considering the effect of external fields only, while in Section 4 those modifications are described which originate from internal fields and finite relaxation times.
Keywords
PhysicsLarmor precessionMagnetic fieldPolarization (electrochemistry)ParamagnetismFree induction decayNuclear magnetic resonanceField (mathematics)ObservableAtomic physicsCondensed matter physicsQuantum mechanicsChemistrySpin echo
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Publication Info
- Year
- 1946
- Type
- article
- Volume
- 70
- Issue
- 7-8
- Pages
- 460-474
- Citations
- 3418
- Access
- Closed
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Cite This
F. Bloch
(1946).
Nuclear Induction.
Physical Review
, 70
(7-8)
, 460-474.
https://doi.org/10.1103/physrev.70.460
Identifiers
- DOI
- 10.1103/physrev.70.460