The cross section for this process is proportional to "the co-secant of theta divided by two to the fourth power".
The cross section for this process is proportional to "the co-secant of theta divided by two to the fourth power". Mott scattering is the equivalent of this process in electrons. One person who discovered this process went on to develop a device that detects ionizing radiation with clicking sounds. Ernest Marsden and Hans Geiger discovered this phenomenon via an experiment in which roughly 1 of every 8000 particles fired was deflected at an angle greater than 90 degrees. This experiment disproved JJ Thomson's plum pudding model and lead to the development of the Bohr model of the atom. For 10 points, name this type of scattering discovered when alpha particles were fired at a gold foil. 
The cross section for this process is proportional to "the co-secant of theta divided by two to the fourth power".
Rutherford scattering