Which particles were used in Geiger-Marsdon experiment?

Detector used in Marsdon experiment is

Detector used in Marsdon experiment is

Detector used in Marsdon experiment is

Which organisms were used in Hershey-chase experiment?

The graph of the total number of alpha -particles scattered at different angles in a given interval of time for alpha - particles scattering in the geiger- marsden experiment is given by

Source of alpha -particles used in scattering experiment was