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Title: Results from the High Resolution Fly's Eye Experiment

Abstract

The High Resolution Fly's Eye (HiRes) Experiment operated two fluorescence detector sites in the western Utah desert between 1997 and 2006. The HiRes results on the cosmic ray spectrum are consistent with the GZK Suppression predicted at 10{sup 19.8} eV and observe an ankle structure at 10{sup 18.5} eV. These spectral features are consistent with a proton-dominated composition for cosmic rays at the highest energies. The HiRes composition studies of both the mean and the variance of the shower maximum depth (X{sub max}) also give results that are completely consistent with a predominately protonic composition, and inconsistent with heavy nuclei such as iron. We also report on the result of anisotropy studies.

Authors:
 [1]
  1. Department of Physics, University of Utah, 115 S. 1400 E. Rm. 201 Salt Lake City, Utah, 84112-0830 (United States)
Publication Date:
OSTI Identifier:
21608333
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1367; Journal Issue: 1; Conference: International symposium on the recent progress of ultra-high energy cosmic ray observation, Aichi (Japan), 10-12 Dec 2010; Other Information: DOI: 10.1063/1.3628706; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANISOTROPY; ASTROPHYSICS; COSMIC NUCLEI; COSMIC PROTONS; COSMIC RAY DETECTION; COSMIC SHOWERS; EEV RANGE; ENERGY SPECTRA; FLUORESCENCE; IRON 56; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; RED SHIFT; RESOLUTION; ULTRAVIOLET RADIATION; BARYONS; COSMIC RADIATION; DETECTION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; EMISSION; ENERGY RANGE; EVEN-EVEN NUCLEI; FERMIONS; HADRONS; INTERMEDIATE MASS NUCLEI; IONIZING RADIATIONS; IRON ISOTOPES; ISOTOPES; LUMINESCENCE; MEASURING INSTRUMENTS; NUCLEI; NUCLEONS; PHOTON EMISSION; PHYSICS; PRIMARY COSMIC RADIATION; PROTONS; RADIATION DETECTION; RADIATIONS; SECONDARY COSMIC RADIATION; SHOWERS; SPECTRA; SPECTROMETERS; STABLE ISOTOPES

Citation Formats

Jui, C. C. H. Results from the High Resolution Fly's Eye Experiment. United States: N. p., 2011. Web. doi:10.1063/1.3628706.
Jui, C. C. H. Results from the High Resolution Fly's Eye Experiment. United States. doi:10.1063/1.3628706.
Jui, C. C. H. Thu . "Results from the High Resolution Fly's Eye Experiment". United States. doi:10.1063/1.3628706.
@article{osti_21608333,
title = {Results from the High Resolution Fly's Eye Experiment},
author = {Jui, C. C. H.},
abstractNote = {The High Resolution Fly's Eye (HiRes) Experiment operated two fluorescence detector sites in the western Utah desert between 1997 and 2006. The HiRes results on the cosmic ray spectrum are consistent with the GZK Suppression predicted at 10{sup 19.8} eV and observe an ankle structure at 10{sup 18.5} eV. These spectral features are consistent with a proton-dominated composition for cosmic rays at the highest energies. The HiRes composition studies of both the mean and the variance of the shower maximum depth (X{sub max}) also give results that are completely consistent with a predominately protonic composition, and inconsistent with heavy nuclei such as iron. We also report on the result of anisotropy studies.},
doi = {10.1063/1.3628706},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1367,
place = {United States},
year = {2011},
month = {9}
}