Abstract
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 language | English (US) |
---|---|
Pages (from-to) | 1459-1469 |
Number of pages | 11 |
Journal | Physical Review D |
Volume | 45 |
Issue number | 5 |
DOIs | |
State | Published - 1992 |