This Week
Smithsonian Institution's National Museum of American History mounts exhibition chronicling career of Ella Fitzgerald; photo; David Hare play, The Judas Kiss, will premiere at Playhouse in the West End, directed by Richard Eyre and starring Liam Neeson; Russian National Orchestra, billed as first orchestra from former Soviet Union to be free of Government control since 1917, will begin 18-city United States tour with performances in State Theater in New Brunswick, NJ; Brooklyn Museum of Art mounts exhibit, Jewels of the Romanovs: Treasures of the Imperial Court; photo (M)