Interstitial atoms in tungsten: Interaction with free surface and in situ determination of formation energy
Interstitial atoms in tungsten: Interaction with free surface and in situ determination of formation energy
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DOI：
10.1103/physrevb.78.115418
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发表时间：
2008-09
影响因子：
3.7
通讯作者：
I. Neklyudov;E. Sadanov;G. D. Tolstolutskaja;V. Ksenofontov;T. Mazilova;I. Mikhailovskij
中科院分区：
文献类型：
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作者：
I. Neklyudov;E. Sadanov;G. D. Tolstolutskaja;V. Ksenofontov;T. Mazilova;I. Mikhailovskij
利用场离子显微镜中低温场蒸发钨的能量分析，实验测定了自间隙原子的形成能。实验方法是基于蒸发阈值光场与表面原子总能量的强烈依赖关系。研究发现，表面出现的自间隙原子的形成能释放，可以产生激发的原子态。实验结果在场蒸发的镜像驼峰模型框架下进行了讨论，并与间隙原子形成能的理论数据进行了比较。
The energy of formation of self-interstitial atoms has been experimentally determined using an energy analysis of low-temperature field evaporation of tungsten in a field-ion microscope. An experimental approach, based on the strong dependence of the threshold field for evaporation on the total energy of the surface atoms, is used. It was found that the excited atomic states can be produced by the release of the formation energy of self-interstitial atoms emerging at the surface. The experimental results are discussed in the framework of the image-hump model of field evaporation and compared with theoretical data on the energy of formation of interstitial atoms.