This is the first scientific biography of Pavel Avksentievich Zagorets - a major scientist, teacher and organizer of science, one of the leading domestic scientists in the field of radiation and physical chemistry, vice-rector of the Moscow Institute of Chemical Technology. DI Mendeleev, creator and head of the country's first department of radiation chemistry and radiochemistry. The main directions of the scientist's research work, the contribution of his scientific school to the development of radiation chemistry are considered, the role of P.A. Zagorets in organizing the training of highly qualified engineers of chemical technologists and especially scientific and engineering personnel for the nuclear industry.