Energy spectrum and mass composition of cosmic rays according to the data of the TAIGA-HiSCORE installation

Budnev, Nikolai Mikhailovich; Ternovoy, M.Yu.; Kuzmichev, L. A.; Osipova, E. A.; Prosin, V. V.; Astapov, I. I.; Bezyazeekov, P. A.; Blinov, A.; Bonvech, E. A.; Borodin, A. N.; Bulan, A. V.; Busygin, P.V.; Chernov, D. V.; Chiavassa, A.; Dyachok, A. N.; Gafarov, A. R.; Garmash, A. Yu.; Grebenyuk, V. M.; Gress, E.O.; Gress, O. A.; Gress, T. I.; Grinyuk, A. A.; Grishin, O. G.; Ivanova, A.D.; Ivanova, A. L.; Iliushin, M.A.; Kabannik, I.A.; Kalmykov, N. N.; Kindin, V. V.; Kiryuhin, S. N.; Kolosov, N. I.; Kompaniets, K. G.; Korosteleva, E. E.; Kozhin, A. V.; Kravchenko, E. A.; Kryukov, A. P.; Lagutin, A. A.; Lavrova, M. V.; Lemeshev, Yu.E.; Lubsandorzhiev, B. K.; Lubsandorzhiev, N.; Lukanov, A.; Malakhov, S.D.; Mirgazov, R. R.; Monkhoev, R. D.; Mordvin, E. Y.; Okuneva, E.A.; Pakhorukov, A. L.; Pankov, L. V.; Pan, A.; Panov, A. D.; Petrukhin, A. A.; Podgrudkov, D. A.; Poddubny, I.; Poleschuk, V. A.; Popova, E. G.; Postnikov, E. B.; Pushnin, A. A.; Raikin, R. I.; Razumov, A.V.; Revyakin, A. I.; Rubtsov, G. I.; Ryabov, E. V.; Samoliga, V. S.; Satyshev, I.; Silaev, A. A.; Silaev, A. A. junior; Sidorenkov, A.Yu.; Skurikhin, A. V.; Sokolov, A. V.; Sveshnikova, L. G.; Shaikovsky, A.; Shulga, M. V.; Tabolenko, V. A.; Tanaev, A. B.; Ushakov, N.A.; Volchugov, P. A.; Volkov, N. V.; Voronin, D.M.; Zirakashvili, V.; Zagorodnikov, A. V.; Zhurov, D. P.; Yashin, I. I.

doi:10.22323/1.501.0206

Volume 501 - 39th International Cosmic Ray Conference (ICRC2025) - Cosmic-Ray Indirect

Energy spectrum and mass composition of cosmic rays according to the data of the TAIGA-HiSCORE installation

N.M. Budnev*, M.Y. Ternovoy, L.A. Kuzmichev, E.A. Osipova, V.V. Prosin, I.I. Astapov, P.A. Bezyazeekov, A. Blinov, E.A. Bonvech, A.N. Borodin, A.V. Bulan, P.V. Busygin, D.V. Chernov, A. Chiavassa, A.N. Dyachok, A.R. Gafarov, A.Y. Garmash, V.M. Grebenyuk, E.O. Gress, O.A. Gress, T.I. Gress, A.A. Grinyuk, O.G. Grishin, A.D. Ivanova, A.L. Ivanova, M.A. Iliushin, I.A. Kabannik, N.N. Kalmykov, V.V. Kindin, S.N. Kiryuhin, N.I. Kolosov, K.G. Kompaniets, E.E. Korosteleva, A.V. Kozhin, E.A. Kravchenko, A.P. Kryukov, A.A. Lagutin, M.V. Lavrova, Y.E. Lemeshev, B.K. Lubsandorzhiev, N. Lubsandorzhiev, A. Lukanov, S.D. Malakhov, R.R. Mirgazov, R.D. Monkhoev, E.Y. Mordvin, E.A. Okuneva, A.L. Pakhorukov, L.V. Pankov, A. Pan, A.D. Panov, A.A. Petrukhin, D.A. Podgrudkov, I. Poddubny, V.A. Poleschuk, E.G. Popova, E.B. Postnikov, A.A. Pushnin, R.I. Raikin, A.V. Razumov, A.I. Revyakin, G.I. Rubtsov, E.V. Ryabov, V.S. Samoliga, I. Satyshev, A.A. Silaev, A.A.j. Silaev, A.Y. Sidorenkov, A.V. Skurikhin, A.V. Sokolov, L.G. Sveshnikova, A. Shaikovsky, M.V. Shulga, V.A. Tabolenko, A.B. Tanaev, N.A. Ushakov, P.A. Volchugov, N.V. Volkov, D.M. Voronin, V. Zirakashvili, A.V. Zagorodnikov, D.P. Zhurov and I.I. Yashinet al. (click to show)

*: corresponding author

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Pre-published on: November 22, 2025

Published on: December 30, 2025

Abstract

Since 2022, the TAIGA-HiSCORE installation, part of the TAIGA astrophysical complex, has been operational with 120 Cherenkov stations covering an area of 1 $km^2$. The energy of Extensive Air Showers (EAS) is determined by the flux density of Cherenkov light at a distance of 200 m from the EAS axis for energies above 1 PeV and at 100 m for lower energies. The depth of the EAS maximum ($X_{max}$) is derived from the steepness of the spatial distribution function of light, defined as the ratio of light fluxes at 80 m and 200 m from the axis. This paper presents the energy spectrum and mass composition of cosmic rays based on 700 hours of data collection, providing insights into the cosmic ray properties in the energy range of $10^5$ to $10^{20}$ eV.

DOI: https://doi.org/10.22323/1.501.0206

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