The experiment allows to demonstrate the nuclear spin of protons in a sample of glycerol using relatively simple methods. NMR (Nuclear Magnetic Resonance) absorption signals are observed in a small permanent magnet producing a field of approximately 500 Gauss. Observing the beat frequency between the spin detector and the Larmor frequency of the spin system after excitation with short high-frequency pulses, the transverse and longitudinal relaxation are measured employing different pulse sequences.
Prerequisite for this experiment is the knowledge of quantum mechanics.
The tutorial may be downloaded here in PDF format or alternatively be obtained personally from the assistant.
The experiment is also introduced in the following publication:
- W. Klein, Nuclear magnetic resonance: Free-induction decay and spin echoes in a 0.05 T magnetic field, Am. J. Phys. 58, p.143-147
Dr. R. Berger – Room HS1 – Tel: 470-3612
Email: berger (at) ph1.uni-koeln.de
For further reading you are advised to study the following literature:
- The Feynman Lectures on Physics II, 34-1 to 35-12
- The Feynman Lectures on Physics III, 7-10
- Introduction to Magnetic Resonance, R. Schumacher, Chapter 1-3
There is an introduction on nuclear magnetic resonance on the internet, which is also recommended: http://www.cis.rit.edu/htbooks/mri/