The initial stage of radiation defect creation has often been shown to follow a power law distribution at short time scales, recently so with tungsten, following many self-organizing patterns found in nature. The evolution of this damage, however, is dominated by interactions between defect clusters, as the coalescence of smaller defects into clusters depends on the balance between transport, absorption, and emission to/from existing clusters. The long-time evolution of radiation-induced defects in tungsten is studied with cluster dynamics parameterized with lower length scale simulations, and is shown to deviate from a power law size distribution. The effects of parameters such as dose rate and total dose, as parameters affecting the strength of the driving force for defect evolution, are also analyzed. Excellent agreement is achieved with regards to an experimentally measured defect size distribution at 30 K. This study provides another satisfactory explanation for experimental observations in addition to that of primary radiation damage, which should be reconciled with additional validation data.

辐射缺陷产生的初始阶段通常显示出在短时间尺度上遵循幂律分布，最近在钨方面也是如此，遵循自然界中发现的许多自组织模式。但是，这种损害的演变主要由缺陷簇之间的相互作用所决定，因为较小的缺陷向簇中的合并取决于向/从现有簇的传输，吸收和发射之间的平衡。钨的辐射诱发缺陷的长期演变是通过用较低长度尺度的模拟参数化的团簇动力学来研究的，并且证明其与幂律尺寸分布有偏差。还分析了诸如剂量率和总剂量之类的参数的影响，这些参数是影响缺陷发展的驱动力强度的参数。