Laser Cooling and Deceleration of Neutral Atoms by Red-Shifted Diffuse Light

We report a cooling and deceleration experiment of a thermal beam by using a nearly resonant red-shifted diffuse light in an optical integral sphere cavity. By using of this red-shifted diffuse light, the velocity of a part of thermal sodium atoms is cooled to 380m/s and the velocity width of cooled atoms is about 18m/s. The mechanism of this kind of laser cooling and the experimental results are discussed.