The efficiency of stabilization of H centers as well as its dependence on the degree of uniaxial deformation are considered within the framework of the modified geometric model of alkali halides. It is shown that stabilization of H centers is difficult in KI and RbI crystals, while in other NaCl-type crystals it becomes quite probable. Under uniaxial deformation, the interstitial space, in which the defect will be located, decreases, and the efficiency decrease. In the case of cesium halides, the orientation of the H centers takes place predominantly in the <100> direction; therefore, the criteria for their stabilization differ from the NaCl-type alkali halide crystals. According to calculations, in CsI, large displacements of the nearest neighbors are required to stabilize H centers; while in CsBr their stabilization becomes sensitive to the effect of uniaxial deformation. The efficiency of H center stabilization obtained by the geometric model is compared with the corresponding efficiencies obtained from the theory of local excitations and the calculated total probability of accumulation of H centers under the influence of uniaxial deformation.

中文翻译：

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碱金属卤化物晶体低温单轴变形时H中心稳定的效率

在改进的碱金属卤化物几何模型的框架内，考虑了氢中心的稳定效率及其对单轴变形程度的依赖性。结果表明，在KI和RbI晶体中，很难稳定H中心，而在其他NaCl型晶体中，则很有可能。在单轴变形下，缺陷所在的间隙空间减小，效率降低。在卤化铯的情况下，H的方向中心主要发生在<100>方向；因此，其稳定的标准不同于NaCl型碱金属卤化物晶体。根据计算，在CsI中，为了稳定H中心，需要最近邻的大位移。而在CsBr中，它们的稳定性对单轴变形的影响变得敏感。将通过几何模型获得的H中心稳定的效率与从局部激励理论获得的相应效率以及在单轴变形的影响下计算出的H中心累积总概率进行比较。