Molecular oxygen (O2) is a paramagnetic linear molecule, yet the effect of its molecular alignment and electron spin on the dynamics of O2 adsorption has remained unclear. Recently, it has been however shown that the use of magnetic hexapolar field allows us to prepare a single spin-rotational state [(J,M) = (2, 2)] selected O2 beam for which both the molecular alignment and the spin state of O2 are well defined. State-resolved studies of O2 sticking on Si(1 0 0), Al(1 1 1), Ni(1 1 1) surfaces conducted with this beam have clarified that the O2 sticking probability depends strongly on the molecular alignment and the spin orientation of O2 relative to the surface. The mechanism of O2 adsorption on Al(1 1 1) has been disputed in the past few decades, but the observed steric effect has provided a reasonable picture for it. The preparation method of the state-selected O2 beam and its application to the alignment- and spin-resolved O2 sticking studies are reviewed.

中文翻译：

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通过自旋和排列控制的 O 2 束研究表面上的氧吸附

分子氧 (O2) 是一种顺磁性线性分子，但其分子排列和电子自旋对 O2 吸附动力学的影响仍不清楚。然而，最近已经表明，磁六极场的使用允许我们准备一个单一的自旋旋转状态 [(J,M) = (2, 2)] 选择的 O2 光束，其分子排列和自旋状态O2 定义明确。使用该光束对 O2 粘附在 Si(1 0 0)、Al(1 1 1)、Ni(1 1 1) 表面的状态分辨研究表明，O2 粘附概率在很大程度上取决于分子排列和自旋取向O2 相对于表面。在过去的几十年中，O2 在 Al(1 1 1) 上的吸附机制一直存在争议，但观察到的空间效应为其提供了合理的图景。