Jan Kazimierz Danysz

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, Otto Hahn and Lise 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 radium B + radium C went from 9 to 27 lines. 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 during World [War I].

Family

He was the son of biologist Jean Danysz.
He was the father of physicist Marian Danysz.

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. 30 241-320