Nuclear Magnetic Resonance

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Nuclear Magnetic Resonance Project

The magnetic moment of a nucleon is sometimes expressed in terms of its g-factor (a dimensionless scalar) as \mu=\tfrac{g\mu_{_N}}{\hbar}I, where \mu is an intrinsic magnetic moment, \mu_{_N} is the nuclear magneton and is given by \mu_{_N}=\tfrac{e \hbar}{2 m}, g is the nucleon's g-factor, I is the nucleon's spin angular momentum number and m is the nucleon's mass. The ^1H Hydrogen/Proton Gyromagnetic Ratio, \gamma_{_P}, is equal to \tfrac{g_{_P} \mu_{_N}}{\hbar}.

g_{_P}=5.585\; 694\; 702(17) The proton's g-factor

\frac{\mu_{_N}}{\hbar}= 7.622\; 593\; 285(47)\text{ MHZ/T}

So, \gamma_{_P}=42.577\; 478\; 92(29)\text{MHz/T}

Larmor Frequency: \omega_{_0}=\gamma H_{_0}

Our magnet will produce fields up to ~ 0.7T. This allows for transverse field frequencies up to ~ 30MHz. We employ a bridged-tee detector (Waring - 1952) to observe the NMR signal.

Basic Theory

(for more detailed explanations see Nuclear Magnetic Resonance - Andrew)

- The Resonance Condition

- Spin-Lattice Relaxation Time

- Spin-Spin Interactions

- Saturation

- Magnetic Susceptibilities

- Conditions for Observation of NMR Absorption

NMR Video

Links and Info:

- A Bridged Tee Detector for NMR - Waring