1982•American Journal of PhysicsRequires access

Nuclear spins in the Earth’s magnetic field

Paul T. Callaghan, Michel Gros

Abstract

Details are given of a simple apparatus for the observation of nuclear precession in the Earth’s magnetic field. Spin echos are generated using a pulse of oscillatory magnetic field resonant at the Larmor frequency. Students can use the system to measure a nuclear magnetic moment, nuclear relaxation times, and the local strength and orientation of the Earth’s magnetic field.

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Available abstract

Key concepts: Physics, Larmor precession, Magnetic field, Precession, Nuclear magnetic moment, Neutron magnetic moment, Proton magnetic moment, L-shell