Jan Kazimierz Danysz
Jean Danysz born Jan Kazimierz Danysz, was a French physicist of Polish extraction. He was an assistant of Maria Skłodowska-Curie and notable in the development of beta spectrometry.
Danysz made considerable advances on the magnetic deflection techniques of Baeyer, Hahn and Meitner, placing the source in a capillary tube under a slit, with a photographic plate in the same horizontal plane. By this means the known number of lines superimposed on the beta energy spectrum of RaB + RaC went from 9 to 27. He finished his doctoral thesis in 1913, and by 1914 he was considered by Rutherford as a leading researcher into beta decay, but he did no further work. He enlisted in the French army in 1914 and was killed in action near Cormicy.Publications
J. Danysz, Le Radium 9, 1 ; 10, 4
Danysz, J. Recherches expérimentales sur les β rayons de la famille du radium Ann. Chim. Phys. 30 241-320Family
