Rotary echoes in nitrogen-14 quadrupolar spin-system

This is a study of the influence of the multi-pulse sequences consisting of one or more blocks of short-repetition phase alternated pulses on nitrogen-14 NQR spin-system. It was shown that these sequences permit detecting rotary echo signals in the effective field of the pulse sequence. Multiple rotary echoes were detected and analysed. The obtained results add to the understanding of dynamic properties of quadrupolar spin-system. Experimental results for polycrystalline NaNO2 are presented.