Accession Number : AD0474162


Title :   HIGH-RESOLUTION NUCLEAR MAGNETIC RESONANCE IN SOLIDS.


Descriptive Note : Annual technical rept. 1 Aug 64-31 Jul 65,


Corporate Author : NOTTINGHAM UNIV (UNITED KINGDOM)


Personal Author(s) : Andrew, E R


Report Date : Sep 1965


Pagination or Media Count : 23


Abstract : The nuclear magnetic resonance spectra of solids whose spectral lines are narrowed by the technique of high-speed rotation were investigated. By rotation about an axis inclined at the angle of 54 degrees 44 min. to the direction of the applied field, the dipolar broadening of the lines was effectively removed, enabling the fine structure, characteristic of n.m.r. spectra of fluids to be revealed. An investigation was undertaken of the many parameters entering into the design of the rotor stator system. The peripheral velocity of the rotor was close to the velocity of sound in air. The best design parameters were carried forward to smaller systems using 3/4 in. diameter rotors. Rotors of this diameter ran at speeds up to about 5.5 kc/s when propelled by air. Further increases in rotation rate were achieved by propelling the rotors with He gas. The limitations on rotation rate became the strength of the rotor. Nylon rotors of 3/4 in. diameter disintegrated at rates of about 9 kc/s. A study was made of the dependence of linewidth on rotation rate for the P-31 resonance in solid Pcl 5 and work was done on solid P255. A new resonant broadening effect was demonstrated in solid Pcl5. (Author)


Descriptors :   *PHOSPHORUS , NUCLEAR MAGNETIC RESONANCE , MOLECULAR SPECTROSCOPY , SOLIDS , CHLORIDES , SULFIDES , HYPERFINE STRUCTURE , INSTRUMENTATION , NYLON , ROTATION , VELOCITY , HELIUM , TRACER STUDIES , UNITED KINGDOM


Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Solid State Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE