Experimental observation of quantum reflection far from threshold |
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Authors: | Druzhinina V DeKieviet M |
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Affiliation: | Physikalisches Institut, Heidelberg University, 69120 Heidelberg, Germany. |
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Abstract: | We present first experimental evidence for quantum reflection, originating exclusively from an attractive potential between an atom and a solid surface, at energies far from the threshold E(i)-->0. The system of light and stable 3He atoms scattering from an alpha-quartz crystal allows confirmation of recent theory on quantum reflection up to its asymptotic behavior, determined by the nonretarded van der Waals potential -C(3)/r(3). From the data, the gas-solid interaction potential is deduced quantitatively, covering the energy region, in which retardation plays a role. |
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