van der Waals - Zeeman transitions of metastable neon atoms passing through a micro-slit copper gratingJ.-C. Karam, J. Grucker, M. Boustimi, F. Perales, V. Bocvarski, J. Baudon, G. Vassilev, J. Robert and M. Ducloy
Laboratoire de Physique des Lasers (UMR-CNRS no. 7538) Université Paris 13 - Av. J. B. Clément, 93430 Villetaneuse, France
received 6 December 2005; accepted in final form 14 February 2006
published online 8 March 2006
Surface-induced transitions between Zeeman sub-levels of metastable neon atoms traversing a micro-slit copper grating are investigated. The quadrupolar part of the surface van der Waals interaction suddenly perturbs the evolution of the Zeeman sub-levels in a magnetic field B, giving rise to van der Waals - Zeeman transitions. Exothermal inelastic transitions are identified by the related deflection . In a diagram (, B1/2) the location of the inelastic peaks is fitted by straight lines of slopes proportional to , where is the magnetic number change.
34.50.Dy - Interactions of atoms and molecules with surfaces; photon and electron emission; neutralization of ions.
03.75.Be - Matter waves: Atom and neutron optics.
12.20.Fv - Quantum electrodynamics: Experimental tests.
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