Coincidences between extensive air showers and the Soudan 1 underground muon detector

U. Das Gupta, P. Border, K. Johns, N. Longley, M. Marshak, E. Peterson, K. Ruddick, M. Shupe, D. Ayres, J. Dawson, T. Fields, M. Goodman, E. May

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We have operated the Soudan 1 underground muon detector in coincidence with a 36-m2 detector situated at the Earth's surface. Such a combination of detectors can yield information on the composition of the primary cosmic rays at energies above 3 × 1015 eV, where there is an abrupt change in the slope of the energy spectrum. The present experiment was meant to test the feasibility of operating such a system, and to obtain a first sample of data before the complete installation of the much larger Soudan 2 detector. These initial data seem to favor a light composition in the energy range 1015-1016 eV, but there are significant systematic uncertainties.

Original languageEnglish (US)
Pages (from-to)1459-1469
Number of pages11
JournalPhysical Review D
Issue number5
StatePublished - 1992

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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