Jeferson A. Ortiz
University of Delaware
7 Papers
24 Citations
Jeferson A. Ortiz is an academic researcher from University of Delaware. The author has contributed to research in topics: Air shower & Cosmic ray. The author has an hindex of 3, co-authored 7 publications. Previous affiliations of Jeferson A. Ortiz include University of São Paulo.
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Papers
Atmospheric shower fluctuations and the constant intensity cut method
TL;DR: In this article, the authors explore the constant intensity cut method that is widely used for the derivation of the cosmic ray energy spectrum, for comparisons of data obtained at different atmospheric depths, for measuring average shower profiles, and for estimates of the proton-air cross section from extensive air shower data.
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The importance of muon information on primary mass discrimination of ultra-high energy cosmic rays
D. Supanitsky,A. Tiba,Gustavo Medina-Tanco,Alberto Etchegoyen,Ingomar Allekotte,M. Gómez Berisso,V. de Souza,C. Medina,Jeferson A. Ortiz,R.C. Shellard +9 more
TL;DR: In this article, the impact of additional information about the number of muons in the air shower, on the problem of statistical primary mass discrimination was assessed, including neural networks, principal component analysis and traditional methods.
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On the role of hadronic interactions in giant air showers
Jaime Alvarez-Muñiz,R. Engel,Thomas K. Gaisser,Jeferson A. Ortiz,Todor Stanev +4 more
- 01 Jul 2003
TL;DR: In this paper, the authors present an efficient hybrid method to simulate the longitudinal development of ultra-high energy air showers, accounting in detail for muon production and fluctuations, and apply it to the simulation of extensive air showers with QGSJET and SIBYLL.
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Fluorescence photons produced in air by extensive air showers
TL;DR: In this paper, the authors calculate the fluorescence photon yield of an electron in air, taking into account the energy spectrum of electrons in showers initiated by proton and iron nuclei as a function of height.
Hybrid simulations of extensive air showers
TL;DR: In this paper, the authors present a fast one dimensional hybrid method to efficiently simulate extensive air showers up to the highest observed energies based on precalculated pion showers and a bootstrap technique, predicting the average shower profile, the number of muons at detector level above several energy thresholds as well as the fluctuations of the electromagnetic and hadronic components of the shower.