NMR中I_nS体系的交叉极化和各向同性混合
Cross Polarization Process and Isotropic Mixing Process For InS System in NMR
Abstract
常规的积算符法不能获得自旋为1/1I＿nS（n≥2）体系的密度算符在交叉极化和各向同性混合过程随时间演化的解析解。作者提出用投影算符法解决此问题，并以I＿2S体系的交叉极化过程为例分析了获得无相位畸变和强度失真nMr谱的方法。 projection operators have been employed to Find polynomial expressionsFor exponential operators.The method can solve the problem that coherence transFer of InSspin systems(I=S=1/2,n≥2)evolve under cross polaization and isotropic mixing.Theanalytical solutions of these processes of I_2S spin system have been derived in terms of thecomputer algebra REDUCE.Authors have illustrated the application of the results to sup-press the phase and multiplet anomalies in NMR.