The Classical Treatment: Nuclear Spin Angular Momentum

1
The Classical TreatmentNuclear Spin Angular
Momentum
Ho
parallel
anti-parallel

• Torque int. motion precession
• Precession around Z axis
• Larmor frequency (?)
• DE hgHo ? DE hn ? n ?H0 ?

2
Pulse Fourier Transform NMR
t
90ºx RF pulse

? ? H0
Ho
Ho
A
t
Fourier Transform
f
?
Variation of signal at X axis vs. time
NMR frequency
3
The Power of Fourier Transform
t
90ºx RF pulse

?1 ? H0 ?2 ? H0
A
t
Fourier Transform
f
?1
?2

• NMR frequency domain
• Spectrum of frequencies

• NMR time domain
• Variation in amplitude vs time

4
The Pulse FT NMR Experiment