Ultra short-time dynamics of radiation damage in fcc metals

Article

关键词: X-RAY SOURCE;    TRANSITION;   

DOI  :  10.1103/PhysRevB.80.184204

来源: SCIE

【 摘 要 】

We have performed molecular-dynamics simulations of displacement cascades in copper in order to investigate the nonequilibrium ultra-short-time damage and to evaluate the possibility of observing it experimentally in situ (e.g., in a pump/probe laser experiment). The atomic trajectories have been analyzed by calculating their x-ray diffraction patterns as a function of time. The results show that an integrated x-ray intensity can indeed be used to evidence the irradiation effects. Even though the number of Frenkel defects is large, the main effect of the irradiation showing up in the x-ray intensities at ultrashort times is an important alteration of the lattice vibrations. On the basis of these results, a pump/probe setup is proposed.

【 授权许可】

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