Monopole flux limits from the Soudan I experiment

This chapter describes the search for magnetic monopoles using the Soudan I proton decay detector, which is located 600 meters underground on the 23rd level of the Soudan mine. The detector consists of 3,456 proportional tubes arranged in 48 layers of 72 tubes each, embedded in heavy, iron-rich concrete. Topics considered include the search for highly-ionizing particles, the search for slowly moving particles, the search for the monopole catalysis of nucleon decay events, and acceptance for monopole events. It is observed that at high velocities the events look like electromagnetic showers, while at lower velocities, the detector is always triggered by the daughter particles of decays in the rock