论文标题
使用双晶体偏转器在液体表面上X射线反射率的散射矢量范围的三倍
Tripling of the scattering vector range of X-ray reflectivity on liquid surfaces using a double crystal deflector
论文作者
论文摘要
我们通过使用双晶体偏转器设置从液体表面散射X射线散射的垂直动量转移（Q_Z）的最大范围三倍，以倾斜入射X射线束。这是通过使用反射晶体原子平面的米勒指数（比平常高三倍）获得的。我们计算了X射线梁轴和双晶转换器的主旋转轴之间的未对准引起的确切的bragg角条件的偏差，并推断出快速，直接的程序以对齐它们。我们在液体铜的裸露表面和液体铜上的石墨烯上显示了X射线反射率的测量值，直至q_z = 7a^（-1）。
We achieved a tripling of the maximum range of perpendicular momentum transfer (q_z) of X-ray scattering from liquid surfaces using a double crystal deflector setup to tilt the incident X-ray beam. This is obtained by using Miller indices of the reflecting crystal atomic planes that are three times higher than usual. We calculate the deviation from the exact Bragg angle condition induced by a misalignment between the X-ray beam axis and the main rotation axis of the double crystal deflector and deduce a fast and straightforward procedure to align them. We show measurements of X-ray reflectivity up to q_z=7A^(-1) on the bare surface of liquid copper and on graphene on liquid copper.
