On the energy estimation of ultra-high-energy cosmic rays observed with the surface detector array
- 1 June 1988
- journal article
- Published by IOP Publishing in Journal of Physics G: Nuclear Physics
- Vol. 14 (6), 793-805
- https://doi.org/10.1088/0305-4616/14/6/020
Abstract
A Monte Carlo simulation has been carried out to look for a suitable parameter as the energy estimator for large extensive air showers (EAS) at Akeno. For primaries of fixed energy, the fluctuation of the electron density at several hundred metres from the EAS core is smaller than that near the core, as has been pointed out by Hillas et al. (1971). The present simulation shows that the fluctuation of the electron density at 600 m (S(600)) from the core is within 20%, irrespective of the primary composition, for zenith angles less than 35 degrees and primary energies above 1018 eV. The conversion factor from S(600) to the primary energy is independent of primary composition and interaction models within a certain zenith angle (-2) is E0(eV)=(2.03+or-0.10)*1017 S(600)1.02+or-0.02 for vertical showers with energy greater than 1017 eV.Keywords
This publication has 8 references indexed in Scilit:
- The cosmic-ray energy spectrum above 1017eVJournal of Physics G: Nuclear Physics, 1986
- Expanded array for giant air shower observation at AkenoNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986
- Evidence for a High-Energy Cosmic-Ray Spectrum CutoffPhysical Review Letters, 1985
- Energy spectrum of primary cosmic rays between 1014.5and 1018eVJournal of Physics G: Nuclear Physics, 1984
- On estimating the energy of giant air-shower primariesJournal of Physics G: Nuclear Physics, 1983
- The upper end of the observed cosmic ray energy spectrumJournal of Physics A: Mathematical, Nuclear and General, 1974
- The cosmic ray spectrum at energies above 1017eVJournal of Physics A: Mathematical, Nuclear and General, 1973
- The Lateral and the Angular Structure Functions of Electron ShowersProgress of Theoretical Physics Supplement, 1958