Table 1.

Comparison of anisotropy for orthogonal frustrated translational modes of CO chemisorbed on Cu(110)

Method	E[FT-〈11̄0〉], meV	E[FT-〈001〉], meV	Anisotropy ratio
TOF-ESDIAD*	4.9  ±  0.7	3.1  ±  0.5	1.58  ±  0.23
HAS†	3.75  ±  0.1	3.4  ±  0.1	1.11  ±  0.07

^*Ref. 9. 

^†J. Braun, J. Weckesser, J.A., D.M., J.T.Y., and C. H. Wöll, unpublished results.