lecture2_bloch - Today's Lecture 1 Rabi Molecular Beam...

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A. S. Edison University of Florida 2008 Today’s Lecture 1) Rabi Molecular Beam experiment (continued from last time) 2) Fri, Oct 3: Behavior of nuclear spins in a magnetic field II a. Bloch equations b. Phenomenological introduction to T1 and T2 c. RF Pulses d. “Teach Spin” apparatus
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A. S. Edison University of Florida 2008 OVEN Slit Slit Detector Frequency Generator I. I. Rabi molecular beam experiment to measure γ (Feynman Lectures on Physics) z The coil produces a magnetic field along the x-axis (going into the board). B 0 ϖ ϖ 0 0 0 B γ ϖ = When the frequency reaches resonance, particles no longer reach the detector. . B z > 0 B z < 0 B z = 0
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A. S. Edison University of Florida 2008 γ Relates frequency and magnetic field 0 0 B γ ϖ = ϖ ν h = = h E 0 0 0 ) 2 1 ( 2 1 B B B E γ γ γ h h h = - - = Planck’s Law Important NMR equation relating frequency with magnetic field strength! Larmor Equation
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A. S. Edison University of Florida 2008 μ = γ I The magnetic moment ( μ ) is a vector parallel to the spin angular momentum (I). The gyromagneto (or magnetogyro) ratio ( γ ) is a physical constant particular to a given nucleus.
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