English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

From the data on Cherenkov light from EASs collected over the period of morethan 15 years, the spectrum of cosmic rays was obtained in the energy range1.0E15-1.0E18 eV. This spectrum has two features: at ~3.0E15 eV (first knee)and at ~1.0E17 eV (second knee). The first knee is characterized by the indexes\gamma_1=2.7+/-0.03 and \gamma_2 = 3.12+/-0.03 and the second knee - by\gamma_1 = 2.92+/-0.03 and \gamma_2=3.24+/-0.04. In the second case thedifference amounts to \Delta\gamma_23=0.32{\pm}0.03{\pm}0.05 which is less thanthe case of the first knee \Delta\gamma_12=0.42+/-0.03+/-0.05 (here dual errorsrepresent statistics and systematics correspondingly). The lesser difference\Delta\gamma_23 can be explained with the influx of cosmic rays fromMeta-galaxy and, hence, with some increase of the cosmic rays intensity in theenergy range 5.0E16-1.0E18 eV, which compensates the escape of heavier nucleifrom the Galaxy. The presence of the second knee could be confirmed by abruptchange in mass composition from from lnA~3 at ~1.0E17 eV to lnA~1.5 at 1.0E18eVfound from the analysis of longitudinal development of EAS.

Cosmic ray spectrum in the energy range 1.0E15-1.0E18 eV and the second knee according to the small Cherenkov setup at the Yakutsk EAS array