A vector model for spin 1 dynamics

For spin 1 nuclei the three components of the spin I and I are replaced 

Spin 1 dynamics is described by three rules (1) pulses with a rotation strength of cause the usual rotations among the observable components IxiJyi and 7 i) (2) precession due to the quadrupole interaction is confined to a particular subsystem. For example magnetization along (created by a 90° pulse along ly ) precesses in the plane (or ly in the lyiJy2 

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