2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/120443We calculate neutrino and photon energy spectra in extragalactic space from evaporation of primordial black holes, assuming that the power spectrum of primordial density fluctuations has a strong bump in the region of small scales. The constraints on the parameters of this bump based on neutrino and photon cosmic background data are obtained.6 pages, 4 figuresAstrophysicstext