Analysis of information sources in references of the Wikipedia article "Percobaan Geiger-Marsden" in Indonesian language version.
"..The scintillation method, developed by W. Crookes, J. Elster, and H. Geitel, allowed just that. However, Rutherford wanted to count them by an "electric" method and constructs, together with his young German co-worker Hans Geiger, the first particle counter in 1908. In order to ascertain the properties of the alpha-particles, he asks Geiger and an English-New Zealand student, E. Marsden, to study their scattering through thin metallic foils....