TL;DR
This paper uses known proton-nucleus scattering analysis to determine the neutron-proton spin-flip factor and calculates the resulting asymmetry in proton-Helium-3 elastic scattering, suggesting a practical polarization measurement method.
Contribution
It introduces a novel approach to measure He3 beam polarization using CNI polarimetry based on neutron-proton scattering analysis.
Findings
The neutron-proton spin-flip factor varies with energy.
The pHe3 asymmetry is comparable in magnitude to pp asymmetry.
The asymmetry has an opposite sign to pp scattering asymmetry.
Abstract
By making use of previous analysis of CNI for pp and pC scattering, the spin-flip factor for np scattering is determined as a function of energy and then used to calculate the p He3 asymmetry A_N(s)' arising in p He 3 elastic scattering. It is found to be comparable to A_N(s) for pp scattering, but of the opposite sign. It seems that this method could be a practical for measuring the polarization of a He3 beam.
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