Author/Authors :
Rich، نويسنده , , D.R. and Bowman، نويسنده , , J.D. and Crawford، نويسنده , , B.E. and Delheij، نويسنده , , P.P.J. and Espy، نويسنده , , M.A. and Haseyama، نويسنده , , T. and Jones، نويسنده , , G. and Keith، نويسنده , , C.D. and Knudson، نويسنده , , J. and Leuschner، نويسنده , , M.B. and Masaike، نويسنده , , A. and Masuda، نويسنده , , Y. and Matsuda، نويسنده , , Y. and Penttilن، نويسنده , , S.I. and Pomeroy، نويسنده , , V.R. and Sm، نويسنده ,
Abstract :
The capability of performing accurate absolute measurements of neutron beam polarization opens a number of exciting opportunities in fundamental neutron physics and in neutron scattering. At the LANSCE pulsed neutron source we have measured the neutron beam polarization with an absolute accuracy of 0.3% in the neutron energy range from 40 meV to 10 eV using an optically pumped polarized 3He spin filter and a relative transmission measurement technique. 3He was polarized using the Rb spin-exchange method. We describe the measurement technique, present our results, and discuss some of the systematic effects associated with the method.
