Experiments on He-3-He-4 mixtures in aerogel

We describe experiments on He-3-He-4 mixtures in 98% open aerogel grown by cold-deposition (T less than or equal to 80mK) of He-4 followed by the depo sition of He-3 or alternatively by, cooling down a homogenous mixture. The two approaches led to different He-4 film morphologies. We will also descri be the observation of migration of He-4 from or toward the cell below 100 m K. This migration can lead to the exclusion of He-4 (other than the localiz ed surface layers) for He-4 concentrations between 4% and 11% in the cell.