“Harmut Kallmann (5 February 1896 – 11 June 1978) was a German physicist.[1] He is known for his work on the scintillation counter for the detection of gamma rays.
Biography
Kallmann was born in Berlin. He studied at the University of Göttingen and wrote his dissertation under Max Planck, completing it in 1920. After which he worked at the Kaiser Wilhelm Institute for Physical Chemistry and Elektrochemistry. As a post-doctoral student he worked with Fritz Haber and Fritz London. In 1933 he was dismissed for Haber’s institute due to his non-Aryan descent. The companies IG Farben and AEGprovided him a research lab to continue his work but with some restrictions.[2]
Kallmann built the world’s first organic scintillator in Berlin.
In 1948, Kallmann’s knowledge about photomultiplier scintillation counters brought him to the United States as a research fellow for the U.S. Army Signal Corps Laboratory in Belmar, NJ.”