FTP, who was this German physicist who introduced the first successful detector of radiation?
With J.M. Nuttall he discovered the empirical rule describing the linear relationship between the logarithm of the range of alpha-radiation and the radioactive time constant of the emitting atoms, and with Walther Bothe he devised the technique of coincidence counting, using it to clarify details of the Compton effect.  In 1909 he and Marsden anticipated Rutherford by demonstrating that gold atoms occasionally deflect alpha particles, but he is better known for a devise improved by Walther Muller.  FTP, who was this German physicist who introduced the first successful detector of radiation?
With J.M. Nuttall he discovered the empirical rule describing the linear relationship between the logarithm of the range of alpha-radiation and the radioactive time constant of the emitting atoms, and with Walther Bothe he devised the technique of coincidence counting, using it to clarify details of the Compton effect.  
Hans Geiger