| Issue |
EPJ Web of Conferences
Volume 99, 2015
ISVHECRI 2014 – 18th International Symposium on Very High Energy Cosmic Ray Interactions
|
|
|---|---|---|
| Article Number | 04003 | |
| Number of page(s) | 5 | |
| Section | Highlight Talks 1 | |
| DOI | https://doi.org/10.1051/epjconf/20159904003 | |
| Published online | 04 August 2015 | |
https://doi.org/10.1051/epjconf/20159904003
Ultra-high energy cosmic rays: 40 years retrospective of continuous observations at the Yakutsk array: Part 2. Mass composition of cosmic rays at ultra high energies
Yu. G. Shafer Institute of cosmophysical Research and Aeronomy, 31 Lenin ave, Yakutsk, Russia
a e-mail: knurenko@ikfia.sbras.ru
b e-mail: igor.petrov@ikfia.sbras.ru
Published online: 4 August 2015
In the paper, we describe methods for the analysis and present results for the mass composition of cosmic rays, obtained by using these techniques over a large time span. The data were obtained at the Small Cherenkov array over a 20 – year period of continuous observation and 40 – years of observations at the main Yakutsk array. Our experimental data indicate a change in the mass composition in the energy range 1016–1018 eV and is confirmed by independent results obtained by other EAS arrays.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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