Journal
APPLIED RADIATION AND ISOTOPES
Volume 69, Issue 12, Pages 1664-1667Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2011.03.015
Keywords
Neutron source; Neutron spectrometry; Beryllium target; Be-9(p,xn) reaction
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Neutron energy spectra at different emission angles, between 0 degrees and 120 degrees from the Be(p,,m) reaction generated by a beryllium thick-target bombarded with 5 MeV protons, have been measured at the Legnaro Laboratories (LNL) of the Italian National Institute for Nuclear Physics research (INFN). A new and quite compact recoil-proton spectrometer, based on a monolithic silicon telescope, coupled to a polyethylene converter, was efficiently used with respect to the traditional Time-of-Flight (TOF) technique. The measured distributions of recoil-protons were processed through an iterative unfolding algorithm in order to determine the neutron energy spectra at all the angles accounted for. The neutron energy spectrum measured at 0 degrees resulted to be in good agreement with the only one so far available at the requested energy and measured years ago with TOF technique. Moreover, the results obtained at different emission angles resulted to be consistent with detailed past measurements performed at 4 MeV protons at the same angles by TOF techniques. (c) 2011 Elsevier Ltd. All rights reserved.
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