ACTIVE SITES AND ICE CRYSTAL NUCLEATION

Abstract

The concept of active nucleation sites is examined in the light of standard nucleation theory and it is suggested that these sites are probably small re-entrant corners or jogs in growth steps on the surface of the nucleating particle. The nucleation behavior of a spherical particle with a conical pit on its surface is examined in detail and the activity of a population of particles having a log- normal distribution of such pits is worked out.