Absolute efficiency measurements with the 10B based Jalousie detector

The B-10 based Jalousie detector is a replacement for He-3 counter tubes, which are nowadays less affordable for large area detectors due to the He-3 crisis. In this paper we investigate and verify the performance of the new B-10 based detector concept and its adoption for the POWTEX diffractometer, which is designed for the detection of thermal neutrons with predicted detection efficiencies of 75-50% for neutron energies of 10-100 meV, respectively. The predicted detection efficiency has been verified by absolute measurements using neutrons with a wavelength of 1.17 angstrom (59 meV). (C) 2014 Elsevier B.V. All rights reserved.