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A Measurement of the Average Longitudinal Development Profile of Cosmic Ray Air Showers Between 10^{17}eV and 10^{18}eV

T. Abu-Zayyad et. al
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Abstract

The average extensive air shower longitudinal development profile as a function of shower age in the energy range from 10$^{17}$ to 10$^{18}$eV is measured using data from the hybrid HiRes/MIA experiment. An angular bin signal based Cerenkov light component subtraction method and a shower maximum fitting method using a local parabolic function are used to correct and normalize the data. The Gaisser-Hillas and Greisen functions work equally well for describing the shower profile. The Gaussian function is a poor fit. A simple scale-free function is proposed and fits the data equally well. The best-fit parameters for the above functions are determined.

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T. Abu-Zayyad et. al. 2000-08-14. A Measurement of the Average Longitudinal Development Profile of Cosmic Ray Air Showers Between 10^{17}eV and 10^{18}eV. https://doi.org/10.1016/s0927-6505(00)00170-5

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