Have (lifted ManCAMBRIDGE, MASS.. (U.R)A Harvard professor said today a “very brilliant a n d gifted” nuclear physicist who fled Nazi rule probably helped in the re-searc' that resulted in Argentina’s reported atomic explosion. Dr. Philipp Frank identified the physicist as Guido Beck, a Czechoslovakian. Frank said that in103G he and Beck were at theUniversity of Prague where thev collaborated on a book on math- i ematics and physics.When Hitler took over Czechoslovakia, Frank said, Beck went to the United States where he taught at the University of Kansas for a vear. He went to the%University of Cordoba in Argentina in about 1 DBS or 1010, Frank said.He said that Beck had written him he was engaged in general research in the atomic field. !