... ^x\' 62 -- 4.5.2 Short-Lived RF Pulses 63 -- 4.5.3 Long-Lived RF Pulses 64 -- 5 The Quantum Mechanical ... ... Basis of Precession and Excitation 67 -- 5.1 Discrete Angular Momentum and Energy 68 -- 5.2 Quantum ... ... Momentum and Angular Momentum Operators 74 -- 5.2.3 Spin Solutions for Constant Fields 76 -- 5.3 Quantum ... ... Derivation of Precession 77 -- 5.4 Quantum Derivation of RF Spin Tipping 80 -- 6 The Quantum Mechanical ... ... Field 744 -- 25.2.2 Susceptibility 744 -- 25.3 Objects in External Fields: The Lorentz Sphere 745 -- ...