Electronic Structures and Processes in Atoms and Small Molecules (Physics)

该项目将提供新一代真空紫外光谱 严格测试理论模型所需的数据， 光电离、光解离和其他过程， 束缚连续电子相互作用。 精确的变化 在宽能量范围内强度与波长的关系是 在这一领域取得进一步进展至关重要，因为所有 电子结构和光诱导过程信息必须 从使用理论的实验数据的反卷积推导出 基于模型。 精确的光谱光度强度（1%或 更好）和绝对光吸收截面（0.5-2.5% 范围）将以高光谱分辨率确定 (R.P 100，000）使用马里兰州大学的设施 (UM)以及SURF II电子储存环。 绝对光吸收截面测量到高 准确性是罕见的，因为它们很难测量。 他们 然而，在许多应用中具有很大的实际意义。 因此，我们建议支持这项工作。

This project will provide a new generation of VUV spectral data necessary for rigorous testing of theoretical models for photoionization, photodissociation, and other processes involving bound-continuum electronic interactions. Precise variations of intensity with wavelength over wide ranges of energy are essential to further progress in this area because all electronic structure and photoinduced-process information must be deduced from deconvolution of the experimental data using theory based models. Precise spectral photometric intensities (1% or better) and absolute photoabsorption cross sections (0.5-2.5% range) will be determined with high spectral resolving powers (R.P 100,000) using facilities at the University of Maryland (UM) and at the SURF II electron storage ring. Absolute photoabsorption cross sections measured to high accuracy are rare because they are difficult to measure. They are however of great practical significance in many applications. We thus recommend support for this work.