High-performance neutron polarimeter NPOL2 for the (p,n) measurements at intermediate energies

Abstract

We have designed and constructed a high-performance neutron polarimeter for (j3, i) measurements at intermediate energies, E = 200 -400 MeV. The current version of the neutron polarimeter, called NPOL2, consists of 6 planes ofthe two-dimensional position-sensitive neutron detectors with a size of 1 mxl mxO.1 rn Its effective left-right analyzing power < A > has been calibrated at 141, 191, 291 and 387 MeV. The Figure-Of-Merit value defined by < >2 XEDS IS about 4x104, irrespective of neutron energies, where DS i5 the double scattering efficiency.