Determination of Atom-Surface van der Waals Potentials from Transmission-Grating Diffraction Intensities

Details Determination of Atom-Surface van der Waals Potentials from Transmission-Grating Diffraction Intensities Determination of Atom-Surface van der Waals Potentials from Transmission-Grating Diffraction Intensities

1999-07-15

arxiv.org/abs/quant-ph/9907053v1

Phys.Rev.Lett. 83 (1999) 1755-1758

Physics

Quantum Physics

4 pages Revtex + 3 figures. Physical Review Letters (in press)

Scientific paper

10.1103/PhysRevLett.83.1755

Molecular beams of rare gas atoms and D_2 have been diffracted from 100 nm period SiN_x transmission gratings. The relative intensities of the diffraction peaks out to the 8th order depend on the diffracting particle and are interpreted in terms of effective slit widths. These differences have been analyzed by a new theory which accounts for the long-range van der Waals -C_3/l^3 interaction of the particles with the walls of the grating bars. The values of the C_3 constant for two different gratings are in good agreement and the results exhibit the expected linear dependence on the dipole polarizability.

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