HIGH ENERGY RAYS. “The longstanding simple picture of a featureless and universal power-law energy spectrum of CRs might have been finally overcome. A remarkable change of spectral indices has been established for several CR energy spectra at a kinetic energy of about 300 GeV.” (CR = cosmic ray).
https://link.springer.com/content/pdf/10.1007/s10686-021-09708-w.pdf