2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203786We consider energy deposition of high energy electrons and photons in universe. We carry out detailed calculations of fractions of the initial energy of the injected electron or photon which are used to heat, ionize and excite background plasma in the early universe for various ionization states and redshifts.21 pages, 12 figuresAstrophysicstext