Measurements of interactions of cosmic-ray neutrinos

Abstract

Measurements deep underground with a 165-m2 scintillation detector array give a number of events attributable to neutrino interactions in a massive rock target surrounding the detector. A large fraction of the events show unexpectedly small energy deposition in the detectors, and a number of events too complex to understand in detail are also observed. Therefore, until more detailed measurements can be made with an improved array now being installed, the rate can be stated only to lie between the limits 2.0 ± 0.5 × 10−13 and 4.5 ± 0.7 × 10−13 cm−2 s−1 sr−1.