Publications [#246711] of Calvin R. Howell

Papers Published
  1. Arnold, CW; Clegg, TB; Karwowski, HJ; Rich, GC; Tompkins, JR; Howell, CR, Characterization of an INVS model IV neutron counter for high precision (γ,n) cross-section measurements, Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, vol. 647 no. 1 (August, 2011), pp. 55-62, Elsevier BV [doi] .

    Abstract:
    A neutron counter designed for assay of radioactive materials has been adapted for beam experiments at TUNL. The cylindrical geometry and 60% maximum efficiency make it well suited for (γ,n) cross-section measurements near the neutron emission threshold. A high precision characterization of the counter has been made using neutrons from several sources. Using a combination of measurements and simulations, the absolute detection efficiency of the neutron counter was determined to an accuracy of ±3% in the neutron energy range between 0.1 and 1 MeV. It is shown that this efficiency characterization is generally valid for a wide range of targets. © 2011 Elsevier B.V.

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