Measurements of the Total Cross Section for the Scattering of Polarized Neutrons from Polarized ³He
Keith, C. D. · Gould, C. R. · Haase, D. G. · Seely, M. L. · Huffman, P. R. · Roberson, N. R. · Tornow, W. · Wilburn, W. S.
Original · EN
Measurements of polarized neutron--polarized ³He scattering are reported. The target consisted of cryogenically-polarized solid ³He, thickness 0.04 atom/b and polarization 40%. The longitudinal and transverse total cross-section differences Δσₗ and Δσₜ were measured for incident neutron energies 2-8 MeV. The results are compared to phase-shift predictions based on four different analyses of n-³He scattering. The best agreement is obtained with a recent R-matrix analysis of A=4 scattering and reaction data, lending strong suport to the ⁴He level scheme obtained in that analysis.
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