Refinement of Global Phase-Shift Analysis for $p+^3He$ Elastic Scattering Using Spin-Correlation Coefficients

ORAL

Abstract

As part of an investigation of the A=4 system, we measured the spin-correlation coefficients A$_{yo}$, A$_{oy}$, A$_{yy}$, and A$_{xx}$ for p-$^{3}$He elastic scattering at E$_{lab}$ of 2.3, 2.7, 4.0, and 5.5 MeV and $\Theta _{lab}$ between 30$^{\circ}$ and 150$^{\circ}$. The data were taken using TUNL's atomic beam polarized ion source and our spin-exchange optical pumping polarized $^{3}$He target\footnote{T. Katabuchi \textit{et al.,} Rev. Sci. Instrum. 76, 033503 (2005)}. We aim to resolve ambiguities in the phase shifts of George and Knutson\footnote{E.A. George and L.D. Knutson, Phys Rev C 67, 027001 (2003)}, which seem most sensitive to A$_{xx}$ and A$_{yy}$ at the lowest of these energies. Our measurements will be shown with phase-shift-analysis solutions, as well as some discussion of systematic effects related to the steering of charged particles by the target's magnetic field.

*Work supported in part by USDOE grant \#DE-FG02-97ER41041.

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Authors

  • Tim Daniels

    • University of North Carolina at Chapel Hill and Triangle Universities Nuclear Laboratory

  • Charles Arnold

    • University of North Carolina at Chapel Hill and Triangle Universities Nuclear Laboratory

  • John Cesaratto

    • University of North Carolina at Chapel Hill and Triangle Universities Nuclear Laboratory

  • Thomas Clegg

    • University of North Carolina at Chapel Hill and Triangle Universities Nuclear Laboratory

  • Alexander Couture

    • University of North Carolina at Chapel Hill and Triangle Universities Nuclear Laboratory

  • Astrid Imig

    • University of North Carolina at Chapel Hill and Triangle Universities Nuclear Laboratory

  • Hugon Karwowski

    • University of North Carolina at Chapel Hill and Triangle Universities Nuclear Laboratory