Universität Hamburg [University of Hamburg]

Family background; education at Tubigen Univ.; Schrodinger Theory thesis at Univ. of Munich (1927), influence of Sommerfeld, Heisenberg. Potsdam experiments inspired by K. Schwarzschild, Emden: Local thermodynamic equilibrium and curve of growth. Spent 1928 at Mt. Wilson. Return to Germany to teach physics during Depression; use of microphotometer, Coude spectrograph; analysis of Tau Scorpii. Pre-war professorship at Yerkes with Struve: line profile information, stellar composition. WWII return to Kiel, star temperature detection, solar spectrum analysis, elements/energy production. Isolation and destruction of German physics, anti-German attitude. Remarks on history of science, views on contemporaries and astrophysical (radio) research; fate of Unsold's correspondence.

This interview was conducted as part of the Archives for the History of Quantum Physics project, which includes tapes and transcripts of oral history interviews conducted with circa 100 atomic and quantum physicists. Subjects discuss their family backgrounds, how they became interested in physics, their educations, people who influenced them, their careers including social influences on the conditions of research, and the state of atomic, nuclear, and quantum physics during the period in which they worked. Discussions of scientific matters relate to work that was done between approximately 1900 and 1930, with an emphasis on the discovery and interpretations of quantum mechanics in the 1920s. Also prominently mentioned are: Niels Henrik David Bohr, O. M. Corbino, Enrico Fermi, Otto Robert Frisch, Ettore Majorana, Chandrasekhara Venkata Raman, Arnold Sommerfeld, Otto Stern, Pieter Zeeman; Como Conference, Rome Conference, Rome Institute of Engineering, and Universität Hamburg.

This interview was conducted as part of the Archives for the History of Quantum Physics project, which includes tapes and transcripts of oral history interviews conducted with ca. 100 atomic and quantum physicists. Subjects discuss their family backgrounds, how they became interested in physics, their educations, people who influenced them, their careers including social influences on the conditions of research, and the state of atomic, nuclear, and quantum physics during the period in which they worked. Discussions of scientific matters relate to work that was done between approximately 1900 and 1930, with an emphasis on the discovery and interpretations of quantum mechanics in the 1920s. Also prominently mentioned are: Niels Henrik David Bohr, Max Born, Gregory Breit, A. C. Crehore, Peter Josef William Debye, Paul Adrien Maurice Dirac, Paul Ehrenfest, R. Fraser, Werner Heisenberg, Paul Hertz, Edwin Crawford Kemble, Earl H. Kennard, Ralph de Laer Kronig, Willis Eugene Lamb, Wilhelm Lenz, Maclaurin, J. Robert Oppenheimer, Wolfgang Pauli, Henry Augustus Rowland, Erwin Schrödinger, John Clarke Slater, Arnold Sommerfeld, Otto Stern, Phillip Subkow, Leo Szilard, John B. Taylord, John Hasbrouck Van Vleck, Wilhelm Wien, A. P. Wills; Columbia University, Cornell University, Københavns Universitet, New York City College, Universität Berlin, Universität Gottingen, Universität Hamburg, and Universität Leipzig.

In this interview, Klaus Hasselmann discusses topics such as: his family background and how he became interested in physics; getting his PhD from the Max Planck Institute for Fluid Dynamics and Gottingen University; Walter Tollmien; University of California, San Diego Institute for Geophysics and Planetary Physics; Scripps Institute of Oceanography; Walter Munk; Norman Barber; John Miles; Hugh Bradner; George Backus; Klaus Wyrtki; Carl Eckart; Charles David Keeling; researching storms in the south pacific including Hawaii; Frank Snodgrass; Gordon Groves; measuring waves in the North Sea; becoming director of the newly formed Department of Theoretical Geophysics at the University of Hamburg; Donald Menzel; the Max Planck Institute for Meteorology; North Atlantic Treaty Organization (NATO); Woods Hole Oceanographic Institution; Wolfgang Sell; Art Maxwell; Dirk Olbers; Heinz-Hermann Essen; Peter Muller; wave dynamics; Global Atmospheric Research Programme (GARP); Reimar Lust; Kirk Bryan; World Climate Research Programme; European Centre for Medium Range Weather Forecasts (ECMWF); Lennart Bengtsson; El Nino predictions; Intergovernmental Panel on Climate Change (IPCC); carbon dioxide emissions; Hans Hinzpeter; plasma physics; quantum field theory.

Career in nuclear physics, chiefly through 1939; describes differences in atmosphere among the Universities of Vienna, Berlin, London and Copenhagen; his switch from mathematics to physics at Vienna; work at University of Berlin on a grant, with Peter Pringsheim, before going to Hamburg to work with Otto Stern; with Hitler laws in effect, leaves for position with Patrick M. S. Blackett at Birkbeck College, 1933; then to Niels Bohr's Institute, until 1939; anecdotes about working on neutron experiments and nuclear models in Copenhagen; recounts how he and Lise Meitner explained fission, and memorandum with Rudolf Peierls on bomb possibilities; brief comments on postwar career.

This interview was conducted as part of the Archives for the History of Quantum Physics project, which includes tapes and transcripts of oral history interviews conducted with circa 100 atomic and quantum physicists. Subjects discuss their family backgrounds, how they became interested in physics, their educations, people who influenced them, their careers including social influences on the conditions of research, and the state of atomic, nuclear, and quantum physics during the period in which they worked. Discussions of scientific matters relate to work that was done between approximately 1900 and 1930, with an emphasis on the discovery and interpretations of quantum mechanics in the 1920s. Also prominently mentioned are: Doermer, Alfred Landé, Wolfgang Pauli, Otto Stern, M. Volmer, A. Walther; Carnegie Institute, and Universität Hamburg.

Early life and family in Amsterdam; childhood interest in astronomy and telescope-building; undergraduate at Rijksuniversiteit te Leiden (W. deSitter, J. Woltjer), works at Leiden Observatory; growing interest in galactic research (Ejnar Hertzsprung, Jan Oort); contact with others at Leiden (Paul Ehrenfest, Hendrik Kramers). Assistantship at Rijksuniversiteit te Gröningen, 1938; cooperative stellar catalog with Harvard University and Universität Hamburg. Life during the German Occupation, conditions in Leiden and Holland; the Resistance Movement; returns to Leiden, 1945. Begins work on thesis at end of war, continues Jacobus C. Kapteyn's interest in proper motion of helium star (Scorpio-Centaur association); compares Boss Catalog and FK Catalog for systematic errors (Oort). Discussion of postwar developments in time scale problem (Albrecht Unsöld, Victor Ambartsumian). To Yerkes Observatory, 1947; impressions of Yerkes and other American observatories: RR Lyrae variables (Otto Struve), 1947-1948; work on extension of cluster expansion (W. W. Morgan), 1952; work in Kenya on stellar positions (Maarten Schmidt), 1949-1950. Back to Yerkes, 1953-1957 (Bengt Strömgren, Gerard Kuiper, S. Chandrasekhar, A. Hiltner). Directorship of Kapteyn Laboratory, Groningen; organization of the Radio Foundation. Origins and development of European Southern Observatory; five-year term as Director. Views on development of astronomy in Holland (Antoine Pannekoek, Marcel Minnaert, Pieter van Rhijn); radio astronomy.