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 (<or=35 degrees ), but depends on the lateral distribution function of electrons. By using the interaction model (QCD) and the lateral distribution function which give the best fit to Akeno experimental data, the conversion factor at Akeno level (920 g cm-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.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
