Jerzy Maria Pniewski ( born 1.06.1913)-a Polish physicist, a member of the Polish Academy of Sciences (1971). He was born in Płock. He graduated from the faculties of mathematics (1936) and physics (1938) of the University of Warsaw. In 1949 — 51 he worked at the University of Liverpool. After returning to Poland he has worked at the University of Warsaw (from 1963 as professor), in 1953 — 75 also as director of the Institute of Experimental Physics of the University of Warsaw, and from 1975 as head of the physics department of the institute.
His work was in the fields of molecular optics, spectroscopy, nuclear physics and elementary particle physics. In 1952, together with M. Danysz, he discovered hypernuclei, and in 1963 double hypernuclei.
State Prizes of the Polish People's Republic (1955,
1964).