VIBRATIONAL-MODES AND LINE WIDTHS FOR HYDROGEN ADSORBED ON RU(10(1)OVER-BAR-0)

被引：16
|
作者：
GRUYTERS, M
JACOBI, K
机构：
[1] Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin
来源：
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 1993年 / 64-5卷
关键词：
D O I：
10.1016/0368-2048(93)80126-7
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
High resolution electron energy loss spectra (HREELS) were measured for H adsorption on Ru(1010). Two different adsorption sites of C-s, symmetry are sequentially filled which are assigned to the two different threefold hollow sites in the Ru(1010) unit cell. With decreasing coverage the FWHM of the vibrational mode (150 meV) normal to the surface increases from 10 to more than 20 meV. This observation is consistent with quantum motion at small coverages and a wide protonic band in the excited state. The strong decrease of the FWHM by a factor of two during temperature decrease from 90 to 20 K is unexplained so far.
引用
收藏
页码：591 / 598
页数：8
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