School of Physics Lecture Demonstration Manual

Na-5 Nuclear Magnetic Resonance

Published: Friday 17 March 2006 - Updated: Thursday 31 March 2011


To visually demonstrate nuclear magnetic resonance


NMR demonstration apparatus


Click on pictures to enlarge.

Nuclear Mag Res Pic


The billiard balls in the demonstration apparatus have an intrinsic magnetic moment supplied by an imbedded magnetised disk. The demonstrator supplies a collinear angular momentum by manually setting the sphere spinning with a quick twist of the hand. The apparatus is subjected to a magnetic field rotating at the Larmor precession frequency perpendicular to a static field. Rotating the external field causes the classical "spin flip".

 NB: This demonstration may not be available if the experiment is in student use in the Part 3 laboratory.

Safety notes

Electrical safety 


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