Undetected Electron Backscattering in PERKEO III
arXiv:1905.10189 · doi:10.1051/epjconf/201921904005
Abstract
The beta asymmetry in neutron beta decay is used to determine the ratio of axial-vector coupling to vector coupling most precisely. In electron spectroscopy, backscattering of electrons from detectors can be a major source of systematic error. We present the determination of the correction for undetected backscattering for electron detection with the instrument PERKEO III. For the electron asymmetry, undetected backscattering leads to a fractional correction of , i.e. a change by 40% of the total systematic uncertainty.
arXiv commentProceedings of the International Workshop on Particle Physics at Neutron Sources PPNS 2018, Grenoble, France, May 24-26, 2018
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