Abstract
External filtered neutron beams have been developed at the horizontal radial channels No. 4 of Dalat research reactor. In the material composition of the neutron filters, the primary material components of Iron, Aluminum, Nickel and Vanadium are used to obtain the mono-energetic neutron beams of 24 and 59 keV, with low level of Gamma and slow neutron background. A computer code and Monte-Carlo simulation technique were applied to optimize the filter configurations and to deduce the neutron energy distributions in the filtered beams. A hydrogen-filled proton recoil detector and the activation method with Gold foils were used to measure the neutron energy spectrum and flux of each beam at sample position. The results of experimental neutron fluxes are 6.1 × 105 and 5.3 × 105 n/cm2/s for 24 and 59 keV beams, respectively.
Highlights
In the present development of nuclear science and technology, the high accuracy experimental data on neutron interaction with nuclei and elements are necessary in the development of nuclear theoretical models and in compilation of evaluated nuclear data files, which are the basis data for reactor designing and safety analysis, and for nuclear applications in medicine, industry, nuclear astrophysics [1], etc
In order to improve the quality of neutron induced reaction cross sections, several high energy resolution facilities by neutron time of flight (TOF) technique have been developed based on utilization of a high intensity spallation neutron source
The filtered neutron beam at the Kyiv Research Reactor has been applied for precise measurements of neutron total cross sections [6]
Summary
In the present development of nuclear science and technology, the high accuracy experimental data on neutron interaction with nuclei and elements are necessary in the development of nuclear theoretical models and in compilation of evaluated nuclear data files, which are the basis data for reactor designing and safety analysis, and for nuclear applications in medicine, industry, nuclear astrophysics [1], etc. Until now, for a large number of nuclei, How to cite this paper: Son, P.N., et al (2014) Development of 24 and 59 keV Filtered Neutron Beams for Neutron Capture Experiments at Dalat Research Reactor. In order to improve the quality of neutron induced reaction cross sections, several high energy resolution facilities by neutron time of flight (TOF) technique have been developed based on utilization of a high intensity spallation neutron source. The filtered neutron beam at the Kyiv Research Reactor has been applied for precise measurements of neutron total cross sections [6]. The aim of this research is to apply the neutron filter technique [6] [7] to provide new neutron beams of mono-energies at 24 and 59 keV for neutron capture and total cross sections measurements, and related research at the horizontal channels No 4 of Dalat research reactor (DRR)
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