Physics calibration of the Soudan II nucleon decay experiment using BNL neutrinos

For neutrino energies near the nucleon mass, the shape of the E/sub nu/ flux spectrum from the wide-band beam at the AGS resembles the shape of flux spectrum from atmospheric neutrinos. An opportunity is thus presented to measure the extent to which neutrino events can mimic decaying nucleons in a proton decay search, provided that a detector representative of the underground experiment can be operated in the Brookhaven beam. This crucial calibration measurement is feasible for the Soudan II experiment, wherein a 1.1 kiloton detector is assembled out of standardized five-ton tracking calorimeter modules. Each module provides fine-grained dE/dx/ sampling with independent signal readout. Details concerning neutrino exposures using a cluster of these modules is presented