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The design, construction and applications of a novel double-axis helium atom spectrometer

机译:新型双轴氦原子光谱仪的设计,构造和应用

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摘要

A novel helium atoms spectrometer has been developed for the study of elastic and inelastic collisions with surfaces. The spectrometer is a double-axis design, providing the experimentalist with the capability of using an analyzer crystal to provide energy resolution for either elastic or inelastic experiments. The spectrometer is novel in that scattering angle at both axes may be adjusted during the experiment, allowing great flexibility in the design and execution of experiments of solid surfaces;The mechanisms and operating characteristics of the spectrometer are described. The initial tests of the spectrometer, using the well characterized LiF(001) surface, are also presented. These tests demonstrate that the spectrometer may function as a high precision double-axis diffractometer. During these initial tests, spurious scattering events and an insufficient signal to background ratio prevented the observation of single phonon scattering. Subsequent modifications to improve the signal to background are described.
机译:已经开发出一种新颖的氦原子光谱仪,用于研究与表面的弹性和非弹性碰撞。该光谱仪是双轴设计,为实验人员提供了使用分析仪晶体为弹性或非弹性实验提供能量分辨率的能力。该光谱仪的新颖之处在于可以在实验过程中调节两个轴的散射角,从而在设计和执行固体表面实验时具有极大的灵活性;描述了该光谱仪的机理和工作特性。还介绍了使用特性良好的LiF(001)表面的光谱仪的初始测试。这些测试表明该光谱仪可以用作高精度双轴衍射仪。在这些初始测试期间,杂散事件和信噪比不足导致无法观察到单声子散射。描述了用于改善背景信号的后续修改。

著录项

  • 作者

    Folkerts, Robert L.;

  • 作者单位
  • 年度 1992
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类

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