E1-Physical Rutherford Scattering-Rev1 - Nanyang...

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Nanyang Technological University School of Physical and Mathematical Sciences Division of Physics and Applied Physics PAP 119 Physics Lab Ib Experiment 1: Physical Rutherford Scattering Background In 1910, Ernest Rutherford conceived the idea of the solar system model of the atom on the ba- sis of preliminary evidence emerging from the alpha particle scattering experiments of Geiger and Marsden. In order to fully test his model of the atom, Rutherford assumed that the scattering of the alpha particles was due to the inverse-square electrostatic repulsion between the alpha particle and the positively-charged atomic nucleus. Based on this assumption, he calculated the proportions of alpha particles scattered at di ff erent angles, and compared these theoretical proportions to those measured experimentally. Rutherford’s alpha scattering experiments were the first experiments in which individual particles were systematically scattered and detected. This is now the standard operating procedure of particle
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