Abstract
The spatial and energy characteristics of the neutron fields produced on the surface of a massive lead target irradiated with 1.5 and 5 GeV protons were investigated. In the course of the experiment, the distribution of the fission rates of the threshold nuclides 232Th and 209Bi on the lateral surface of the target was obtained in two directions (transverse and longitudinal). The fission rates of 235U (in and without a cadmium filter), 234U, 236U, 237Np, and 238U and the corresponding spectral indices and cadmium ratio for 235U were also measured on the target surface.
For the two values of the proton energy, the experimental values were compared with one another and with Monte Carlo simulation results.
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REFERENCES
M. I. Krivopustov, D. Shultem, J. Adam, et al., “First experiments with a large uranium blanket within the installation ‘Energy plus transmutation’ exposed to 1.5 GeV protons,” Kerntechnik, 68, No.1–2, 48–55 (2003).
R. Brandt, M. I. Krivopustov, Ts. Tumendelger, et al., “Investigation of the temperature and neutron fields in lead with interaction of relativistic protons,” Preprint R1-99-117, Joint Institute of Nuclear Research, Dubna (2000).
V. A. Voronko, V. M. D'yachenko, K. D. Tolstov, et al., “Neutron generation in an extended lead target,” At. Energ., 68, No.6, 449–452 (1990).
I. V. Zhuk, N. M. Grusha, E. M. Lomonosova, et al., “Measurement of the ratios of the average cross sections of the threshold reactions 234U(n, f), 236U(n, f), and 237Np(n, f) to the average cross section of the reaction 235U(n, f) in a critical BPS-4 assembly,” Izv. Akad. Nauk BSSR. Ser. Fiz.-Tekhn. Nauk, No. 2, 18–22 (1987).
M. K. Kievets, I. V. Zhuk, M. I. Krivopustov, and A. N. Sosnin, “Investigation of the spatial-energy distribution of neutrons in a uranium-lead assembly under bombardment with relativistic protons with energy 1.5 GeV,” Izv. NAN Belarusi. Ser. fiz. tekhn. nauk, No. 3, 114–119 (2002).
A. N. Sosnin, M. I. Krivopustov, D. Chultem, et al., “Monte Carlo simulation of neutron spectra in proton irradiated U-Pb assembly,” Izv. Akad. Nauk. Ser. Fiz., 66, No.10, 1494–1496 (2002).
P. Lisowski, J. Ullman. S. Balestrini, et al., “Neutron induced fission cross section ratios for 232Th, 235,238U, 237Np, and 239Pu from 1 to 400 MeV,” in: Proceedings of the International Conference on Nuclear Data for Science and Technology, May 30–June 3, 1988, JAERI, Mito, Japan (1998), pp. 97–103.
P. Lisowski, A. Gavron, W. Parker, et al., “Fission cross section ratios for 233, 234,236U relative to 235U from 0.5 to 400 MeV,” in: Proceedings of the International Conference on Nuclear Data for Science and Technology, May 13–17, 1999.
A. Abanades, J. Aleixandre, S. Andriamonje, et al., Results from TARC Experiment Spallation Neutron Phenomenology in Lead and Neutron-Driven Nuclear Transmutation by Adiabatic Resonance Crossing. The TARC Collaboration, Report of the European Organization for Nuclear Research CERN/SL/2001-033(EET), Geneva (2001).
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Translated from Atomnaya Energiya, Vol. 99, No. 3, pp. 198–203, September, 2005.
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Kievets, M.K., Zhuk, I.V., Sosnin, A.N. et al. Investigation of the Neutron Fields on the Surface of a Massive Lead Target Irradiated with 1.5 and 5 GeV Protons. At Energy 99, 633–638 (2005). https://doi.org/10.1007/s10512-005-0258-7
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DOI: https://doi.org/10.1007/s10512-005-0258-7