Analyzing-power measurements for 2H(n/sub pol/,n)2H scattering at 10 MeV compared to few-nucleon calculations and data for 2H(p/sub pol/,p)2H scattering

The analyzing power A/sub y/(theta) for scattering of neutrons from deuterons at 10 MeV for 300 to 1450 (c.m.) was measured to an accuracy better than +- 0.005. The results are compared to published p-d data at 10 MeV, and convincing differences are noted for the first time. These differences provide a sensitive test both of calculations for the three-nucleon system and, more importantly, of the fundamental nucleon-nucleon interaction