Volume 120, Number 3, November 2017
|Number of page(s)||6|
|Section||Atomic, Molecular and Optical Physics|
|Published online||02 February 2018|
Theoretical calculations for precision polarimetry based on Mott scattering
Dipartimento di Fisica, Università degli Studi di Milano and INFN, Sezione di Milano Via Celoria 16, 20133 Milano, Italy
Received: 24 October 2017
Accepted: 10 January 2018
Electron polarimeters based on Mott scattering are extensively used in different fields in physics such as atomic, nuclear or particle physics. This is because spin-dependent measurements give additional information on the physical processes under study. The main quantity that needs to be understood in very much detail, both experimentally and theoretically, is the spin-polarization function, so-called analyzing power or Sherman function. A detailed theoretical analysis on all the contributions to the effective interaction potential that are relevant at the typical electron beam energies and angles commonly used in the calibration of the experimental apparatus is presented. The main contribution leading the theoretical error on the Sherman function is found to correspond to radiative corrections that have been qualitatively estimated to be below the 0.5% for the considered kinematical conditions: unpolarized electron beams of few MeV elastically scattered from a gold and silver targets at backward angles.
PACS: 34.80.Bm – Elastic scattering / 21.10.Ft – Charge distribution
© EPLA, 2018
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