Hans Geiger

Hans Geiger
Hans Geiger
	Geiger in 1928
Born	Johannes Wilhelm Geiger; 30 September 1882; Neustadt an der Haardt, ; German Empire
Died	24 September 1945 (aged 62); Potsdam, Germany
Education	University of Erlangen ; (grad. 1906)
Known for	Geiger counter; Geiger–Nuttall law; Geiger–Marsden experiment; Bothe–Geiger coincidence experiment;
Father	Wilhelm Geiger
Relatives	Rudolf Geiger (brother)
Awards	Hughes Medal (1929); Duddell Medal and Prize (1937);
	Scientific career
Fields	Physics
Workplaces	Victoria University of Manchester; Physikalisch-Technische Reichsanstalt; University of Kiel; University of Tübingen; Technische Hochschule Berlin;
Thesis	Strahlungs-, Temperatur- und Potentialmessungen in Entladungsröhren bei starken Strömen (1907)
Doctoral advisor	Eilhard Wiedemann
Doctoral students	Otto Haxel; Walther Müller; Ernst Stuhlinger; Helmut Volz;

Johannes "Hans" Wilhelm Geiger (30 September 1882 – 24 September 1945) was a German experimental physicist. He is known as the inventor of the Geiger counter, a device used to detect ionizing radiation, and for carrying out the Rutherford scattering experiments, which led to the discovery of the atomic nucleus. He also performed the Bothe–Geiger coincidence experiment, which confirmed the conservation of energy in light-particle interactions.

He was the brother of meteorologist and climatologist Rudolf Geiger.