Fellow, American Council of Learned Societies; Fellow, American Association for the Advancement of Science; Fellow, American Physical Society; Distinguished Service Citation, American Association of Physics Teachers (1990); George Taylor Distinguished Service Award, University of Minnesota (1990); Sigma Xi Distinguished Lecturer (1997-99); APS Centennial Speaker (1998-99); APS-AIP Abraham Pais Prize for History of Physics (2013); Founder, Program in History of Science and Technology, University of Minnesota; Associate Professor, Boston University (1971-72); Honorary Research Associate, Harvard University (1974-75); Volkswagen Foundation Visiting Professor, Deutsches Museum, Munich (1981-82); Austrian Ministry Visiting Professor, Universities of Vienna and Graz (1989); Pieter Zeeman Visiting Professor, University of Amsterdam (1998); Secretary and Editor of Newsletter, History of Science Society (1972-78); Member, U.S. National Committee for the International Union of the History and Philosophy of Science (1974-80); Member, American Studies Association Council (1976-79); Member and Chair, AIP Advisory Committee on History of Physics (1978-93); Member, Bakken Library and Museum Board of Directors (1980-present); Chair, APS Division and Forum on the History of Physics (1986-88, 1998-99); Chair, AAAS Section on History and Philosophy of Science (1993-94); Chair, Commission on History of Modern Physics, International Union of the History and Philosophy of Science (1993-94); President, Minnesota Chapter of Sigma Xi (1995-96); Chair, Seven Pines Symposium Advisory Board (1995-2007); Member, Vienna International Summer University Program Committee (1999-present); FHP Councilor, American Physical Society (2006-09); Member, Science, Technology, and Human Values Editorial Board (1977-87); Editor, American Journal of Physics Resource Letters (1978-present); Member, Archive for History of Exact Sciences Editorial Board (1989-present); Co-Founder and Co-Editor, Physics in Perspective (1997-2013).
History of quantum and nuclear physics prior to the Second World War within their institutional, social, and political contexts, and the role of history of physics in physics teaching.
The Compton Effect: Turning Point in Physics, (1975)
Nuclear Physics in Retrospect, (1979)
Artificial Disintegration and the Cambridge-Vienna Controversy, Observation, Experiment, and Hypothesis in Modern Physical Science (1985)
The Origin of the Liquid-Drop Model and the Interpretation of Nuclear Fission, Perspectives on Science (1994)
Historical Surprises, Science and Education (2006)
Einstein’s Revolutionary Light-Quantum Hypothesis, The Photon: Its First Hundred Years and the Future (2006)
The Seventh Solvay Conference: Nuclear Physics, Intellectual Migration, and Institutional Influence, Intellectual and Organizational Innovation in Science: Historical and Sociological Perspectives (2013)