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Neutron diffraction experiments on the CO monolayer adsorbed on MgO(001) below 40 K are performed to complement information already available from low energy electron diffraction, thermal helium atom scattering and infrared spectroscopy. Revisited configurations for the c(4x2) monolayer containing 6 molecules per unit cell, equivalent by two, are discussed on the basis of a semi-empirical potential...
With the example of the (4 2) commensurate phase of CO adsorbed on MgO(100) below 40 K, we illustrate the difficulty for determining the adsorption sites and the orientations of the admolecules. This system takes advantage of abundant experimental information issued from electron and helium diffraction patterns and infrared signals, and from a lot of theoretical calculations including ab initio...
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