JF Ptak Science Books
This table was primarily compiled in Japanese by Masaaki Koarashi and then translated into English by the Tokyo Physicians for Elimination of Nuclear Weapons. I'm using it here as a template for a larger chronology for the development of the atomic bomb for 1930-1945.
I have added bits here and there and will continue to do so, especially with regards to noting the Nobel Prize efforts in physics. But the great majority of this table was generated by Masaaki Korashi, and not my own work.
- [Numbers following the year refer to the month and (sometimes) the day of the month. So 1933.1.30 is 30 January 1933.]
1930 [Germany] Discovery of radiation which penetrates a leadblock by Walter Bethe. (Received 1954 Nobel prize.)
1932. Jan. .18 [France] Proton emission from beryllium irradiated by alpha-ray, discovered by Frederick Joliot and Irene Curie.
1932. Feb. [England] Neutron discovered by James Chadwick, verifying Rutherford's Baker Lecture.(Received 1935 Nobel prize.)
1932.Feb. [USA] Cylotron developed by Ernest Orlando Lawrence and M.S.Livingston of California University, 27.5 inch size developing One million electron volts. (Received 1939 Nobel prize)