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采用双值随机电报模型描述随机频率跳变过程.考虑具体的晶格结构,计算了几种顺磁离子光子回波的非指数衰减.和Monte Carlo方法模拟的结果非常接近,同实验观察一致,几种样品的衰减形式几乎相同Photon echo decays of several impurity paramagnetic ions are calculated,the historical average of each lattice nuclear spin flip is described by a bivalued random telegraph process,and the spatial average is obtained according to the crystal structure. The results are very close to those of Monte Carlo simulations. From the experimental observations,we obtained that all samples have a universal decay form.
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