Ultra short-time dynamics of radiation damage in fcc metals

Marc Hayoun; Gerrit Coddens; Guillaume Petite

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Ultra short-time dynamics of radiation damage in fcc metals

机译：超短时催化裂化金属中辐射损伤的动力学

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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.

机译：我们已经对铜中的位移级联进行了分子动力学模拟，以研究非平衡超短时损伤并评估在原位进行实验观察的可能性（例如，在泵浦/探针激光实验中）。通过计算其作为时间的函数的X射线衍射图来分析原子轨迹。结果表明，确实可以使用积分的X射线强度来证明辐照效果。即使Frenkel缺陷的数量很大，在超短时间内显示在X射线强度中的辐照的主要作用还是晶格振动的重要改变。基于这些结果，提出了一种泵/探针设置。

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来源
《Physical review》 |2009年第18期|184204.1-184204.7|共7页
作者
Marc Hayoun; Gerrit Coddens; Guillaume Petite;
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作者单位

Laboratoire des Solides Irradies, Ecole Polytechnique, CEA-DSM-IRAMIS, CNRS, 91128 Palaiseau, France;

Laboratoire des Solides Irradies, Ecole Polytechnique, CEA-DSM-IRAMIS, CNRS, 91128 Palaiseau, France;

Laboratoire des Solides Irradies, Ecole Polytechnique, CEA-DSM-IRAMIS, CNRS, 91128 Palaiseau, France;

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正文语种 eng
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metals and alloys; molecular dynamics and particle methods;

机译：金属和合金;分子动力学和粒子方法;

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Ultra short-time dynamics of radiation damage in fcc metals

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