Dose Course 2018_Flipping book

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Cross sections

❑ Molière o Based on small angle scatter theory by Fermi-Eyges o Rutherford cross sections o Valid up to app. 30-40 degrees o Spin and relativistic effects not accounted for o For a randomly selected path length one gets the deflection angle o Path length at least 100 elastic collisions o No restrictions on scattering angle o Spin and relativistic effects are included o Separates electrons and positrons o This theory is more accurate down to a few collisions (contrary to Molière) o Must be pre-determined for certain fixed steps to be efficient ❑ Goudsmith-Saunderson

Dublin 2018