Determination of proton-nucleon analyzing powers and spin-rotation-depolarization parameters at 500 MeV

500 MeV p{→}+p elastic and quasielastic, and p{→}+n quasielastic, analyzing powers (Ay) and spin-rotation-depolarization parameters (DSS, DSL, DLS, DLL, DNN) were determined for center-of-momentum angular ranges 6.8^∘{}--55.4^∘{} (elastic) and 22.4^∘{}--55.4^∘{} (quasielastic); liquid hydrogen and deuterium targets were used. The p{→}+p elastic and quasielastic results are in good agreement; both the p{→}+p and p{→}+n parameters are well described by current phase shift solutions.