Abstract
Data from the Kamiokande detector were used to study the atmospheric (v μ + v μ) (v e + v e) ratio in the multi-GeV energy range. The observed ratio of μ-like to e-like events relative to the calculated ratio, ( μ/e) data/( μ/e) MC = 0.57 -0.07 +0.08 ± 0.07, suggests that the atmospheric (v μ+ v μ) (v e+ v e) ratio is smaller than expected for these neutrino energies. Also studied was the zenith-angle dependence of the above ratio. Results of an analysis of neutrino oscillations are presented.
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