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Impact of laser produced X-rays on the surface of gold

机译：激光产生的X射线对金表面的影响

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In the paper an attempt has been made to use the laser-induced plasma as an X-ray source for the growth of nanostructures on the surface of gold. For this purpose, an Nd:YAG laser operated at second harmonics (λ = 532 nm, E = 400 mj) is used to produce plasma from analytical grade 5N pure Al, Cu and W targets. An analytical grade (5N pure) gold substrate was irradiated by X-rays generated from Al, Cu and W plasma under the vacuum ~10~(-4)Torr. The surface was analyzed by two techniques, XRD and AFM. The aberrations in the XRD peaks show that there are significant structural changes in the exposed gold, in terms of decreased reflection intensities, increased dislocation line density, changes in the d-spacing and disturbance in the periodicity of the planes. AFM used to explore the topography of the irradiated gold reveals that regardless of the source, nm sized hillocks have been produced on the gold surface. The roughness of the surface has increased due to the growth of these hillocks.
机译：在本文中，已经尝试使用激光诱导的等离子体作为X射线源来在金表面上生长纳米结构。为此，使用在二次谐波（λ= 532 nm，E = 400 mj）下工作的Nd：YAG激光器从分析级5N纯Al，Cu和W靶材产生等离子体。在真空〜10〜（-4）Torr下，用Al，Cu和W等离子体产生的X射线辐照分析级（纯5N）金基底。通过XRD和AFM这两种技术对表面进行了分析。 XRD峰中的像差表明，在降低的反射强度，增加的位错线密度，d间距的变化以及平面周期性的扰动方面，裸露的金存在显着的结构变化。原子力显微镜用于探究辐照金的形貌表明，无论其来源如何，在金表面上都产生了纳米级的小丘。由于这些小丘的生长，表面的粗糙度增加了。

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