Nuclear Magnetic Resonance and Spin Lattice Equilibrium

摘要: BY measuring the absorption of radio-frequency energy by a substance in magnetic field due to nuclear resonance1,2, an estimate can be made order magnitude time required for establishment thermal equilibrium between spin system and lattice. The coefficient is proportional difference population states. effect tend equalize states, so that strong less than weak field. This tendency states opposed spin-lattice coupling, which tends restore with By finding produce appreciable reduction coefficient, relaxation transfer from lattice calculated.