A

David

Darling

Hofstadter, Robert (1915–1990)

Robert Hofstadter

Robert Hofstadter was an American physicist who shared with Rudolf Mössbauer the 1961 Nobel Prize in Physics for their investigations of nuclear structure. Hofstadter proposed that protons and neutrons (both of which make up the nucleus) have a positively-charged central core surrounded by a cloud of pions.