TY CONF TI Spectrum of positrons produced due to interaction of gamma-ray background photons with soft background photons KW cosmology: cosmic background radiation; positrons JO Modern astronomy: from the Early Universe to exoplanets and black holes AU Popov, A.. AU Barsukov, D.. AU Ivanchik, A.. AU Bobashev, S.. PY 2024 PB Special Astrophysical Observatory of the Russian Academy of Sciences