Energetic Charged-Particle Interactions with Atmospheres and Surfaces

On attending a conference on the Jovian satellites at UCLA, I heard Lou Lanze­ rotti vigorously present the exciting data on the sputtering of water ice by Me V protons taken with W. L. Brown at AT&T Bell Labs. In his inimitable way he made clear that this new electronic sputtering process was very poorly under­ stood and was very important for surface properties of sattelites. I was immedia­ tely hooked, and have been working ever since with Lanzerotti, Brown, my col­ league at Virginia, J...