MONDAY MORNING f EQEC'94 / 13 mirror, we use the evanescent wave that is formed by total internal reflection of a strong laser beam in a (glass) prism. The evanescent wave provides a strong intensity gradient, and thus combines a large potential with a very short interaction time, thereby limiting spontaneous emission even further. To reflect sodium atoms with a velocity of 1 m/s, at a detuning of 2 GHz, a laser intensity of -6 W/ cm' is required. To obtain a reasonable reflective area mirror, this means a laser power of -1 W is required, just barely within the range of commercial dye lasers. We achieve high laser intensities over a bigger spot s u e by coupling the laser to a thin dielectric wave guide, that is deposited on a prism. Thus we obtain an evanescent wave which is a factor of 100-1000 stronger than would be the case for the bare prism. ' We present the first measurements using such an enhanced evanescent wave as a mirror in which to reflect atoms at normal incidence. Sodium atoms are collected in a magneto-optical trap, cooled to -40 p K using polarization gradient cooling and then released to accelerate in the gravity field. The atomic mirror sits 1 M O mm under the trap, and reflects the atomic wave. The reflected atoms are detected in the trap region after their ballistic flight time. We report a large enhancement of the evanescent wave, observed by reflection of atoms dropped from a 10mm hei ht on a large area atomic mirror (10 m m ) up until large detunings (10 GHz) using moderate amounts of laser power (500 mW).
3method depends on the decoupling of high order Green's functions. A comparison of the results of the different methods might reveal information about the mathematics of the decouphg, which is often obscure although the method is physically intuitive. This will be done at a later stage.Abstract. Relativistic corrections to P +H charge transfer are calculated. It is found that relativistic effects completely change the high energy behaviour, but that at the highest energies yet used (10 MeV) the corrections are not signilicant.
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