A neutron polarimeter for the (p,n) reaction at Ep=50-80 MeV

H. Sakai, N. Matsuoka, T. Noro, T. Saito, A. Shimizu, M. Tosaki, M. Ieiri, K. Imai, A. Sakaguchi, Y. Takeuchi, T. Motobayashi

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Abstract

A conventional type of neutron polarimeter consisting of three 12.5 × 12.5 cm cylindrical liquid scintillators and two 12.5 × 12.5 cm cylindrical plastic scintillators has been used to measure the transverse polarization transfer coefficient Kyy in the (p, n) reaction in the energy range 50 < Ep < 80 MeV. The effective analyzing powers of this polarimeter have been obtained empirically by observing neutrons from the 6Li(p, n)6Be reaction at θ = 0° and Ep = 50,65 and 80 MeV whose polarizations are deduced from the Kyy values of the 6Li(p,p′)6Be* (0+ reaction by utilizing the analogue relation. Observed effective analyzing powers are significantly reduced particularly at high energy, most likely due to the 12C(n,np)11B reaction process. The double scattering efficiencies are 6 × 10-4 and 3 × 10-4 with effective analyzing powers of 0.14 and 0.11 at En = 45 and 75 MeV, respectively.

Original languageEnglish
Pages (from-to)279-285
Number of pages7
JournalNuclear Inst. and Methods in Physics Research, A
Volume257
Issue number2
DOIs
Publication statusPublished - Jun 15 1987

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

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