Measurement of the fluctuations in the depth of maximum of showers produced by primary particles of energy greater than 1.5×1017eV
- 1 August 1982
- journal article
- Published by IOP Publishing in Journal of Physics G: Nuclear Physics
- Vol. 8 (8) , 1131-1140
- https://doi.org/10.1088/0305-4616/8/8/016
Abstract
Measurements of the RMS fluctuation of the depth of shower maximum sigma (Xm) as a function of energy are reported from 1.5*1017 to 1019 eV. The results are based on a study of the risetimes of pulses recorded from four 34 m2 water-Cerenkov detectors in 2691 showers having zenith angle less than 40 degrees . The energy dependence of sigma (Xm) is determined and found to be in reasonable agreement with what is expected for a constant mass composition and an energy-dependent nucleon-air cross section.Keywords
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