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.
Cite this paper
Son, P. , Tan, V. , Hoa, P. and Anh, T. (2014) Development of 24 and 59 keV Filtered Neutron Beams for Neutron Capture Experiments at Dalat Research Reactor. World Journal of Nuclear Science and Technology
, 59-64. doi: 10.4236/wjnst.2014.42010
 Goriely, S. (2002) Nuclear Reaction Data Relevant to Nuclear Astrophysics. Journal of Nuclear Science and Technology, Supplement 2, 536-541.
 Gritzay, O., Kolotyi, V., Pshenichnyi, V., Gnidak, M., Kalchenko, O., Klimova, N., et al. (2007) Neutron Filter Technique and Its Use for Fundamental and Applied Investigations. Proceedings of 6th Conference on Nuclear and Particle Physics, Luxor, 17-21 November 2007, 361-372.
 Kiyanagi, Y. (2011) Accurate Neutron Nucleus Reaction Measurement Instrument (ANNRI) for Capture Cross Section Measurements at J-PARC. Journal of the Korean Physical Society, 59, 779-784.
 Borella, A., Gunsing, F., Kopecky, S., Ivanov, I., Mihailescu, C., Moxon, M., et al. (2007) Advances in Neutron-Induced Resonance Reaction Cross Section Studies at GELINA. Proceedings of the International Conference on Nuclear Data for Science and Technology ND2007, Nice, 22-27 April 2007, 546-550.
 Danon, Y., Block, R.C., Rapp, M., Saglime, F., Barry, D.P., Drindak, N.J., Hoole, J. and Leinweber, G. (2007) High-Accuracy Filtered Neutron Beam and High-Energy Transmission Measurements at the Gaerttner Laboratory. Proceedings of the International Conference on Nuclear Data for Science and Technology ND2007, Nice, 22-27 April 2007, 401-402.
 Simpson, O.D. and Miller, L.G. (1968) A Technique to Measure Neutron Cross Sections in the Low keV Energy Region. Nuclear Instruments and Methods, 61, 245-250. http://dx.doi.org/10.1016/0029-554X(68)90236-X
 Greenwood, R.C. and Chrien, R.E. (1976) Filtered Reactor Beams for Fast Neutron Capture γ-Ray Experiments. Nuclear Instruments and Methods, 138, 125-143. http://dx.doi.org/10.1016/0029-554X(76)90157-9
 De Corte, F., Moens, L., Sordo-EL Hammami, K., Simonits, A. and Hoste, J. (1979) Modification and Generalization of Some Methods to Improve the Accuracy of α-Determination in the 1/E1+α Epithermal Neutron Spectrum. Journal of Radioanalytical Chemistry, 52, 305-316. http://dx.doi.org/10.1007/BF02521281
 MCNP (2005) A General Monte Carlo N-Particle Transport Code. Version 5-1.40, Los Alamos National Laboratory, Los Alamos.
 Shibata, K., et al. (2002) Japanese Evaluated Nuclear Data Library Version 3 Revision-3: JENDL-3.3. Journal of Nuclear Science and Technology, 39, 1125-1136. http://dx.doi.org/10.1080/18811248.2002.9715303
 Knauf, K. and Vorbrugg, W. (1991) The Response of a Cylindrical Proton Recoil Proportional Counter to Neutrons Impinging Perpendicularly to Its Axis. Nuclear Instruments and Methods, A305, 419-422.http://dx.doi.org/10.1016/0168-9002(91)90561-4
 Verbinski, V.V. and Giovanni, R. (1974) Proportional Counter Characteristics and Applications to Reactor Neutron Spectrometry. Nuclear Instruments and Method, 144, 205-231. http://dx.doi.org/10.1016/0029-554X(74)90536-9