Hans Geiger 1882-1945 and Ernest Rutherford 1871-1937 in the laboratory in Manchester University where they found that alpha particles were the nuclei of helium atoms and that beta rays were particles travelling at very high speeds.
Hans Geiger 1882-1945 and Ernest Rutherford 1871-1937 in the laboratory in Manchester University where they found that alpha particles were the nuclei of helium atoms and that beta rays were particles travelling at very high speeds.