Yoshio Nishina and Niels Bohr.
| Nummer | B853 |
| Type | Billeder |
| Beskrivelse | Yoshio Nishina and Niels Bohr prepare the blackboard for Bohr's lecture. Japan. |
| Bemærkning | Yoshio Nishina (1890-1951) was a leader of the Japanese atomic bomb program, and the "father of nuclear physics in Japan."
He attended Tokyo Imperial University, graduating with a degree in Electrical Engineering in 1919. He became a research assistant at the Institute of Physical and Chemical Research (known by its Japanese acronym, RIKEN). In 1921, RIKEN sent Nishina to study in Europe. He studied at the Cavendish Laboratory at Cambridge, where he studied under Ernest Rutherford. In 1923, he moved to Copenhagen to work with Niels Bohr. He also visited Göttingen and Hamburg.He left Copenhagen in 1928. In 1931, Nishina established his own lab. Its focuses became quantum mechanics, nuclear physics, cosmic rays, and high-energy proton beams. In 1940, Nishina was asked by the Japanese military to research nuclear fission. In April 1941, the Imperial Japanese Army (IJA) officially authorized Ni-Go, the project to research an atomic bomb. Nishina’s team’s initial conclusion was that an atomic bomb was theoretically, but not technically, feasible. The day after the US dropped an atomic bomb on Hiroshima, Nishina received a copy of a restricted press release about the bomb that had come from President Truman. Nishina confirmed to the government the veracity of the claims about atomic weaponry. This may have influenced the decision-making process that eventually led to Japan's surrender. In October 1945, after surrender, Nishina asked the occupying forces for permission to continue using his remaining cyclotrons for biological and medical research. Permission was initially granted, then rescinded under orders from the Secretary of War. Every cyclotron in Japan was destroyed. |
| Årstal | 1937 |
| Dateringsnote | The picture is taken during Niels Bohr's world tour of 1937. |
| Fotograf | Ukendt |
| Arkiv | Niels Bohr Archive |
