We have measured the spin-transfer parameters K«, KsL, KLs, and Kss at 788 MeV from 47 to 177' c.m. , and also uncovered a 10 -16 /o normalization discrepancy which affects all previous np elastic spin data from LAMPF. Results disagree significantly from previous phase-shift predictions. With the inclusion of these new data the NN phase shifts and amplitudes (isospin 0 and 1) become well determined for the first time near 800 MeV.

Measurements of the spin-transfer parameter Kr, r, for H(p, n)2p at 0' to calibrate the neutronbeam polarization clarify a normalization discrepancy affecting np data at LAMPF. The new data are in good agreement with theoretical predictions.

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We have measured the spin-transfer parameters E~I., E~l., Al. p, and Egg at 635 MeV from 50' to 178' c.m. and at 485 MeV from 74' to 176' c.m. These new data have a significant impact on the phase-shift analyses. There are now sufticient data near these energies to overdetermine the elastic nucleon-nucleon amplitudes.PACS number(s): 21.30. +y, 13.75.Cs, 24.70.+s