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采用同时考虑中心ｄ３离子和配体旋轨耦合作用贡献的双旋轨耦合参量模型，通过计算ＥＰＲ参量Ｄ和ｇ因子，估算出ＡｇＢｒ：Ｖ２＋晶体中的Ｖ２＋ＶＭ四角中心的局域结构参量ΔＲ，并与只考虑中心ｄ３离子旋轨耦合作用的传统单旋轨耦合参量模型的结果作了比较．研究表明，当配体含有大的旋轨耦合系数时，其对ＥＰＲ参量的贡献不能忽略．
By using the dual-gyro-coupled model which considers both the contribution of the d3 ion in the center and the spinodal coupling, the local structure parameters ΔR of the center of V2 + VM in the AgBr: V2 + crystal are calculated by calculating the D and G factors of EPR parameters. , And compared with the results of the conventional single-swirl coupled parametric model that only considers the coupling effect of d3 ion in the center. It is shown that the contribution of the ligand to the EPR parameter can not be neglected when the ligand contains a large coupling coefficient of the spinodal.