Showing papers by "K. T. Tang published in 2000"
TL;DR: In this article, the angular dependence of the elastic scattering of helium atoms from a low coverage (ΘCO=0.03) of randomly distributed isolated CO molecules adsorbed on a Pt(111) surface has been measured over a wide range of incident helium atom beam energies between Ei=5.25 and 62.1 meV.
Abstract: The angular dependence of the elastic scattering of helium atoms from a low coverage (ΘCO=0.03) of randomly distributed isolated CO molecules adsorbed on a Pt(111) surface has been measured over a wide range of incident helium atom beam energies between Ei=5.25 and 62.1 meV. The results are compared with a close-coupling theory for a realistic He–CO potential. From a best fit of the experimental results the distance of the molecule from the surface and a modified gas phase He–CO potential are obtained.
18 citations
TL;DR: In this article, a simple procedure was used to construct the damping functions for extending the Axilrod-Teller-Muto triple dipole dispersion energy for arbitrary three-atom systems to smaller distances.
13 citations
TL;DR: In this paper, a new method based on an extension of the surface integral method to three-body interactions was proposed to calculate the three body exchange energies for H3 and He3.
Abstract: Repulsive three-body exchange energies are calculated for H3 and He3 using a new method based on an extension of the surface integral method to three-body interactions. The dependence of the three-body exchange energies on the internuclear distances between 5 and 10 a0 is investigated for equilateral configurations. The angular dependence is also studied for geometries in which two distances are fixed at equal distances. Very good agreement with other calculations at the same level of approximation is obtained for H3 as well as for He3. The relative importance of the different electron permutations in He3 is discussed.
6 citations
TL;DR: In this paper, the saddle point region potential was calculated using the Cashion-Hershbach (CH) potential, which contains all orders of two-body Coulomb, exchange, and overlap terms.
1 citations