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Spin magnetic moment diffusion length in NMR

  1. Aug 23, 2009 #1
    Hi all:
    I am confused about how far spin magnetic moment goes during a finite diffusion time (such as 100 ms). As we know, due to T2 relaxation mechanism in NMR, spin 1 and spin 2 can exchange magnetic moment but no energy transfer during this exchanging process due to dipole-dipole interaction. If we can locate one special magnetic moment for ideal case, How far is this special magnetic moment going by moving from one water proton to another water proton based on T2 relaxation mechanism? Here I don't mean water diffusion length[~sqrt(6Dt)]. It is free water proton spin diffusion distance. One more question, how fast is the dipole-dipole interaction time? thanks

    xf
     
  2. jcsd
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