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In this case the result is also single-quantum (observable) S (13C) magnetization on thex axis, but the intensity is lower because the magnetization came only from the13 C z magnetization of the equilibrium state. Note that the 1H z magnetization (population differences between the aIaS and jIaS states, 1-3, and between the aI jS and jjI jS states, 2-4) still remains along the diagonal of the density matrix a'. The INEPT sequence has no z magnetization left in the final density matrix a3, as shown by the zero values on the diagonal. The final 90° pulse of the INEPT sequence converts not only the 1H antiphase magnetization to 13 C antiphase magnetization but also the 13 C z magnetization to in-phase observable 13 C magnetization:

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