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- W2078121881 abstract "A measurement of the analyzing power ${mathit{A}}_{mathit{y}}$(ensuremath{theta}) in neutron-deuteron (n-d) elastic scattering below the deuteron breakup threshold is described, including a detailed discussion of the experimental apparatus and the treatment of systematic errors. The data provide a precise test of Faddeev calculations of the three-nucleon system and of the nucleon-nucleon interaction models used as inputs to these calculations. ${mathit{A}}_{mathit{y}}$ was measured at six angles from 44.5 ifmmode^circelsetextdegreefi{} c.m. to 145.7 ifmmode^circelsetextdegreefi{} c.m. to a precision of (7--13)ifmmodetimeselsetexttimesfi{}${10}^{mathrm{ensuremath{-}}4}$. Polarized neutrons, produced by the $^{3}mathrm{H}$(pensuremath{rightarrow},nensuremath{rightarrow}${)}^{3}$He reaction, were incident upon the target, a deuterated organic scintillator. Scattered neutrons were detected in fast coincidence with the recoil deuterons in the target. A computer simulation of the experiment was used to compensate for a number of systematic errors. Particularly important were corrections for neutron multiple scattering, accidental coincidences, and finite geometry effects. The ${mathit{A}}_{mathit{y}}$ data have a 2.2% scale factor uncertainty associated with uncertainty in the polarization of the incident neutron beam. The incident neutron polarization was measured in a separate experiment using n${mathrm{ensuremath{-}}}^{4}$He scattering from a liquid helium scintillator. The neutron polarization measurement also yielded an improved value for the polarization transfer coefficient [${mathit{K}}_{mathit{y}}^{mathit{y}}$(${0}^{mathrm{ifmmode^circelsetextdegreefi{}}}$)=0.650ifmmodepmelsetextpmfi{}0.019] in the $^{3}mathrm{H}$(pensuremath{rightarrow},nensuremath{rightarrow}${)}^{3}$He reaction at ${mathit{E}}_{mathrm{lab}}^{mathit{p}}$=3.80 MeV. A comparison of the ${mathit{A}}_{mathit{y}}$ data to Faddeev calculations shows that the discrepancy in ${mathit{A}}_{mathit{y}}$ observed previously at higher energies continues below the breakup threshold. A comparsion of the ${mathit{A}}_{mathit{y}}$ data to a recent phase shift analysis of proton-deuteron (p-d) scattering indicates that observed differences between n-d and p-d analyzing powers are only partially explained by Coulomb effects." @default.
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- W2078121881 date "1994-08-01" @default.
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- W2078121881 title "Analyzing power in neutron-deuteron elastic scattering atElabn=3 MeV" @default.
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- W2078121881 doi "https://doi.org/10.1103/physrevc.50.589" @default.
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