Andrzej Sołtan (25 X 1897-10 XII 1959) Nuclear physicist. Author of numerous scientific papers on X-rays, spectroscopy of electromagnetic radiation from the band between ultraviolet and X-rays, and nuclear reactions. During his stay in 1932-33 in Pasadena, Ca, worked out a method of producing artificial neutron beams by means of reaction of Lithium and Beryllium with Deuterium; since then the reaction had for a long time become a basic way of obtaining neutrons. Warsaw University Professor since 1947, Member of Polish Academy of Sciences since 1952. Organizer and first Head of the Institute of Nuclear Research in Świerk (predecessor of IPJ). Co-organizer of Joint Institute of Nuclear Research in Dubna (Russia). The most significant publications: Artificial Production of Neutrons (1934, together with H.R. Cran and  Ch.Ch. Lauritsen), Interaction of Fast Neutrons with Atomic Nuclei (1938).