Liquid Drop Nuclear Model
Formulates a liquid-drop picture of the atomic nucleus that complements his reaction theory and later helps explain the collective behaviour involved in nuclear fission.
Historical biography archive · Updated 2026-11-03
Niels Henrik David Bohr Biography and Timeline — Page 2
Follow Niels Henrik David Bohr through 55 dated historical records for Denmark.
Niels Henrik David Bohr, historical timeline
A chronological timeline drawn from matching World History Database records.
55Distinct records
2 of 2Page
1937–1962Years on this page
1937
1938
Copenhagen Cyclotron Programme
Helps establish a cyclotron programme combining nuclear-physics experiments with isotope production, expanding the institute's experimental capabilities beyond spectroscopy.
1939
Experimental Fission Verification in Copenhagen
Directs an institute whose new nuclear equipment enables one of the earliest experimental verifications of fission, linking theoretical interpretation with accelerator-based laboratory work.
1943
Escape from Occupied Denmark
Escapes German-occupied Denmark and reaches Sweden after the worsening danger to Danish Jews makes continued work in Copenhagen untenable.
Los Alamos Scientific Consultant
Arrives at Los Alamos with Aage Bohr as a consultant, using the security name Nicholas Baker while advising scientists working on nuclear-fission weapon physics.
British Atomic Project Adviser
Travels from Sweden to Britain and becomes a scientific adviser connected with the Anglo-American atomic project while continuing to consider its international consequences.
1944
Atomic Initiator Design Advice
Participates actively in discussions and design work concerning the neutron initiator intended to begin the rapid chain reaction in an implosion weapon.
Atomic Openness Campaign
Urges British and American leaders to consider international openness about atomic weapons, believing scientific cooperation could reduce postwar mistrust and an uncontrolled arms race.
Los Alamos Fission Research Guidance
Stimulates renewed theoretical and experimental work on the fission process, including neutron capture and energy-dependent nuclear behaviour, during extended visits to Los Alamos.
1945
Return to Copenhagen Institute
Returns to Denmark after the war and resumes work at the Institute for Theoretical Physics, rebuilding its international research programme.
1950
Open Letter to the United Nations
Issues an open letter urging international cooperation, freer exchange of scientific information and greater openness as safeguards against the dangers created by atomic technology.
1952
CERN Theory Group Founded in Copenhagen
Becomes nominal director of the provisional CERN theoretical study group established at his Copenhagen institute to develop nuclear theory and train young European physicists.
1954
CERN Theory Leadership Handover
Hands leadership of CERN's Copenhagen theoretical study group to Christian Moller as the new European laboratory begins transferring theoretical activities toward Geneva.
1957
Atoms for Peace Award
Receives the first Atoms for Peace Award for pioneering atomic science and sustained advocacy of international cooperation in the nuclear age.
1962
Death
Dies in Copenhagen after a career that reshaped atomic theory, quantum interpretation, nuclear physics and international scientific cooperation.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.