LIFETIMES OF SELECTIVE-ADSORPTION RESONANCES IN ATOM-SURFACE ELASTIC-SCATTERING

被引：21

作者：

HERNANDEZ, MI ^{[1
]}

CAMPOSMARTINEZ, J ^{[1
]}

MIRETARTES, S ^{[1
]}

机构：

[1] UNIV PITTSBURGH, DEPT CHEM, PITTSBURGH, PA 15260 USA

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.49.8300

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

From a time-dependent calculation and by assuming an exponential decay law for the resonances formed, we have computed lifetimes of selective-adsorption resonances (SAR's) in the elastic scattering of He atoms from the Cu(110) and Cu(117) surfaces. In previous works, where SAR's were studied within the time-independent close-coupling method, we found that in addition to the energy width obtained by analyzing plots of diffraction intensities versus the energy of the incident beam, another internal energy width (with a very different numerical value) can be defined. Here we show that it is this internal width that can be directly related to the lifetime of the resonance. Also, we have performed a simulation of the half collision or ''selective-desorption'' process. This approach is shown to yield accurate values for lifetimes of SAR's.

引用

页码：8300 / 8309

页数：10