How did Hans Geiger and Ernest Marsden help to the Rutherford gold foil experiment?
See this link,http://socratic.org/questions/why-did-ruther-ford-s-only-choose-the-gold-foil-for-experiment.
Geiger and Marsden were Rutherford's students and post-doctoral fellows. They actually did the experiment. Rutherford interpreted the results. Geiger and Marsden hewed the wood and carried the water.