Spin interaction filter in solid-state NMR Imaging.
In the tilted rotating frame (TRF), the transverse relaxation time T(2rho) depends strongly on the orientation of TRF with respect to the usual rotating frame. In the spin space, the relative orientation of the two reference frames modifies the contribution of various spin interactions to T(2rho) relaxation. Since the orientation of the frames and, to some extent, the role of the spin Hamiltonians in TRF are controllable experimentally, the T(2rho) relaxation can be made sensitive to molecular mechanisms related to the selected spin interaction. In this paper, the realization of a contrast Hamiltonian-dependent in solid-state NMR Imaging is proved. The solid-state imaging approach is based on the magic angle in the rotating frame. Some results on simple solid polymers are presented.
Casieri
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INFM and Dipartimento di Fisica, Universita' dell'Aquila, L'Aquila, Italy.
De Luca
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