Scattering of CO and N2 molecules by a graphite surface
Scattering of CO and N2 molecules by a graphite surface
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CO 和 N2 分子被石墨表面散射
DOI：
10.1088/0953-8984/24/35/354001
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
W. W. Hayes and J. R. Manson
中科院分区：
文献类型：
--
作者：
Junepyo Oh;Takahiro Kondo;Keitaro Arakawa;Yoshihiko Saito;Junji Nakamura;W. W. Hayes and J. R. Manson
测量了CO和N2分子入射到石墨表面的散射角分布。测量进行了一系列的石墨表面温度从150至400 K和入射的平移能量从275到超过600毫电子伏的范围内。CO和N2的角分布的宽度、位置和相对强度的行为被发现是非常相似的。实验测量进行了讨论，比较与计算使用经典的力学模型，描述单碰撞与表面。基于角分布作为温度和入射平移能的函数的行为，以及测量数据与单碰撞模型的计算之间的一致性，可以得出结论，散射过程主要是与集体表面的有效质量显著大于单个碳原子的有效质量的单碰撞。这一结论与早期的O2分子和氘原子的分子束与石墨的散射实验是一致的。使用理论分子散射模型进行进一步计算，以预测在类似初始条件下散射事件期间分子的平移和旋转能量转移。
Measurements of angular distributions for the scattering of well-defined incident beams of CO and N 2 molecules from a graphite surface are presented. The measurements were carried out over a range of graphite surface temperatures from 150 to 400 K and a range of incident translational energies from 275 to over 600 meV. The behavior of the widths, positions and relative intensities of the angular distributions for both CO and N 2 were found to be quite similar. The experimental measurements are discussed in comparison with calculations using a classical mechanical model that describes single collisions with a surface. Based on the behavior of the angular distributions as functions of temperature and incident translational energy, and the agreement between measured data and calculations of the single-collision model, it is concluded that the scattering process is predominantly a single collision with a collective surface for which the effective mass is significantly larger than that of a single carbon atom. This conclusion is consistent with that of earlier experiments for molecular beams of O 2 molecules and Xe atoms scattering from graphite. Further calculations are carried out with the theoretical molecular scattering model in order to predict translational and rotational energy transfers to and from the molecule during scattering events under similar initial conditions.