HIGH-RESOLUTION NUCLEAR MAGNETIC RESONANCE IN SOLIDS.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1965
- Accession Number
- AD0474162
Entities
People
- E. R. Andrew
Organizations
- University of Nottingham