Jerzy Pniewski : biography
June 1, 1913 – June 16, 1989
Jerzy Pniewski (June 1, 1913 – June 16, 1989) was a Polish physicist.
Pniewski was born in Płock.http://www.fuw.edu.pl/~ajduk/hyperakw.pdf He studied mathematics and physics at the University of Warsaw.
In 1952, he co-discovered the hypernucleus with Marian Danysz. In 1962, he discovered hypernuclear isomery.