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Nuclear Induction

F. Bloch
Phys. Rev. 70, 460 – Published 1 October 1946
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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.

  • Received 19 July 1946

DOI:https://doi.org/10.1103/PhysRev.70.460

©1946 American Physical Society

Authors & Affiliations

F. Bloch

  • Stanford University, California

References

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Issue

Vol. 70, Iss. 7-8 — October 1946

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