Interpretation of helium atom scattering from isolated CO molecules on copper (001) based on an exact quantum mechanical model

Choi, B. H.; Tang, K. T.; Toennies, J. P.
August 1997
Journal of Chemical Physics;8/1/1997, Vol. 107 Issue 5, p1631
Academic Journal
The previously reported scattering of He atoms from isolated CO molecules on Cu(001) has been reinterpreted using an exact quantum mechanical model assuming a hard hemisphere on a hard flat surface. From a best fit of all the observed oscillations for each incident energy an effective radius for the hemisphere is determined. The radius increases from a=2.4 to 4.4 Ã… as the incident energy decreases from 40.3 to 9.4 meV, as expected in view of the soft repulsion and long-range attraction of the true potential.


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