The neutron polarimeter SMART-NPOL has been constructed at the RIKEN Accelerator Research Facility for measuring polarization correlations of proton-neutron systems. The SMART-NPOL system consists of 12 parallel neutron counter planes of two dimensionally position-sensitive plastic scintillators with a size of 60 × 60 × 3.0 cm3. Polarimetry measurements were made using the analyzing power of the 1H (over(n, ⇒), n) 1H reaction occurring in the plastic scintillators. The effective analyzing power of SMART-NPOL was measured with polarized neutrons from the zero-degree 6Li (over(d, ⇒), over(n, ⇒)) reaction with an incident deuteron energy of 135 MeV / A. The effective analyzing power thus obtained was 0.26 ± 0 . 01stat ± 0 . 03syst and the double scattering efficiency was 1.1 × 10- 3.
|ジャーナル||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|出版ステータス||Published - 2007 7 21|
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