Investigation of the molecular crystal structure by the multi-pulsed nuclear quadrupole resonance

The process of cross-polarization under conditions of multi-pulsed spin-locking for 35Cl quadrupole nuclei in the zero external magnetic field is studied in 14 polycrystal compounds. It is shown that the time of cross-relaxation of 35Cl T1e magnetization in proton-containing polycrystals is essentially less than the time of spin-lattice relaxation in the laboratory coordinates systems. It is proved that sharp decrease in the T1e time is conditioned by exchange of spin energies between the Zeeman 35Cl nuclei reservoir and the proton dipole reservoir