The Principles of Nuclear Magnetism

according amplitude applied applied field approximation assume assumption atoms average becomes broadening calculation caused Chapter compared components consider constant contribution correlation corresponding coupling crystal curve defined density dependence described dipolar direction echo effect electron energy equal equation equilibrium existence expectation experiment experimental expression fact factor field H formula frame frequency function gauss given gives H₁ Hamiltonian interaction larger lattice levels line width liquids magnetic magnetic field means measured mechanism method molecule moment motion narrowing nuclear magnetism nuclear spins nucleus observed obtained operator perturbation polarization populations possible precession probability problem proportional protons pulse quadrupole quantum mechanical r.f. field random ratio relation relative relaxation replaced resonance respect rotating sample saturation shape shift shows signal single smaller solids spectrum spin system T₁ T₂ temperature theory thermal tion transition width written Zeeman