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VOLUME 55 (1992) | ISSUE 6 | PAGE 321
Nearly absolute one-dimensional cooling of helium atoms by two oppositely directed monochromatic plane waves
An asymptotically exact velocity distribution is derived for atoms which are cooled by a resonant optical field in the method of coherent population trapping. A narrow structural feature which appears in the distribution function tends toward a <5-function with increasing duration of the interaction with the field.