Inelastic scattering of NO from Ag(111): Internal state, angle, and velocity resolved measurements
Inelastic scattering of NO from Ag(111): Internal state, angle, and velocity resolved measurements
复制标题
Ag(111) 中 NO 的非弹性散射：内部状态、角度和速度解析测量
DOI：
10.1063/1.460342
复制
发表时间：
1991
影响因子：
4.4
通讯作者：
D. Auerbach
中科院分区：
文献类型：
--
作者：
C. Rettner;J. Kimman;D. Auerbach
我们用分子束技术控制入射能量Ei和入射角度θi，测量了在特定的散射角θf下，Ag(111)粒子的各个量子态的速度分布。我们发现，在低碰撞能下，散射粒子的平均能量Ef与θf的关系很弱，但当Ei接近1 eV时，它与这个参数的关系变得越来越不重要。对于所有的最终旋转态J都是如此。先前报道的最终动能对J的不敏感性被发现适用于所有的散射角，因此在高J时EF-θf曲线仅略低于低J时。该系统在高入射能量下是高度平移非弹性的，在Ei=1.0eV时，高达55%的Ei被声子丢失。在低Ei时，角分布对J相对不敏感，但对于高Ei，随着Ei的增加，峰值通量从表面法线移开。表面温度的影响只有在低入射能量时才变得明显。一位S。
We have determined the velocity distributions of individual quantum states of NO scattering from Ag(111) at specific scattering angles θf using molecular beam techniques to control the incidence energy Ei and angle θi. We find that the mean energies of scattered species Ef depend weakly on θf at low collision energies, but become increasingly independent of this parameter as Ei approaches 1.0 eV. This is true for all final rotation states J. The previously reported insensitivity of the final kinetic energy to J is found to apply at all scattering angles, so that Ef vs θf curves for high J fall only slightly below those for low J. This system is highly translationally inelastic at high incidence energies, with up to 55% of Ei being lost to phonons at Ei=1.0 eV. Angular distributions are relatively insensitive to J at low Ei, but for high Ei the peak flux is found to shift away from the surface normal as Ei increases. The effect of the surface temperature only becomes apparent at low incidence energies. A s...