CATASTROPHIC DISRUPTION EXPERIMENTS - RECENT RESULTS

This paper presents a review of the progress in the field of catastrophic disruption experiments over the past 4 years, since the publication of the review paper by Fujiwara et al. (Asteroids II, pp. 240-265, University of Arizona Press, Tucson, 1989). We describe the development of new techniques to produce shattering impacts relevant to the study of the collisional evolution of the asteroids, and summarise the results from numerous experiments which have been performed to date, using a variety of materials for both the impactor and the targets. Some of these, such as ice-on-ice, loose aggregates and pressurised targets, are quite new and have provided novel and exciting results. Some of the gaps existing previously in the data on ; fragment ejection-angle distributions, as well as translational and rotational velocity fields (including fine fragments) have been filled, and these new results will be surveyed.