# First results of the cosmic ray NUCLEON experiment

## TL;DR

The NUCLEON experiment's initial results on cosmic ray nuclei spectra from protons to iron reveal deviations from simple power-law behavior, indicating complex underlying physics in galactic cosmic rays.

## Contribution

This study provides the first measurements of cosmic ray nuclei spectra from 2015-2016, highlighting potential non-canonical phenomena in cosmic ray physics.

## Key findings

- Spectra of protons, helium, carbon, oxygen, neon, magnesium, silicon, and iron measured.
- Observed deviations from universal power-law spectra.
- Indications of complex cosmic ray physics phenomena.

## Abstract

The NUCLEON experiment was designed to study the chemical composition and energy spectra of galactic cosmic ray nuclei from protons to zinc at energies of $\sim10^{11}$--$10^{15}$\,eV per particle. The research was carried out with the NUCLEON scientific equipment installed on the Russian satellite "Resurs-P" No.\,2 as an additional payload. This article presents the results for the measured nuclei spectra related to the first approximately 250 days of the scientific data collection during 2015 and 2016. The all-particle spectrum and the spectra of p, He, C, O, Ne, Mg, Si and Fe are presented. Some interesting ratios of the spectra are also presented and discussed. The experiment is now in its beginning stage and the data still have a preliminary character, but they already give numerous indications of the existence of various non-canonical phenomena in the physics of cosmic rays, which are expressed in the violation of a simple universal power law of the energy spectra. These features of the the data are briefly discussed.