Viscosity of saturated helium-3-helium-4 mixture below 200 mK

The shear viscosity of saturated3He-4He mixture has been measured at temperatures between 7 mK and 200 mK using a vibrating-wire viscometer and a calibrated pressure cell. The reliability of the vibrating-wire technique was tested by measuring the viscosity of pure4He. The results are internally consistent. A phenomenological expression is given for the viscosity of saturated3He-4He mixture between 7 mK and 80 mK