We describe progress in the Tohoku neutron time-of-flight (TOF) facilities improved to facilitate high resolution measurements for neutrons in the range 10 ≤ En ≲ 60 MeV. Efforts have been concentrated on completing the neutron detection system consisting of twelve neutron detectors, in which 23 1 of NE213 liquid scintillator are encapsulated, and a CAMAC-based data acquisition system. A systematic study of the neutron detection efficiency has been performed by Monte Carlo calculation for monochromatic neutrons with En ≲ 34 MeV. Results have been tested by counting neutrons from the 7Li(p, n)7Be reaction and comparing the yield with the absolute neutron fluence determined by activation.
ASJC Scopus subject areas
- Nuclear and High Energy Physics