Spatial distribution of moderated neutrons along a Pb target irradiated by high-energy protons - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Year : 2006

Spatial distribution of moderated neutrons along a Pb target irradiated by high-energy protons

M. Fragopoulou
  • Function : Author
M. Manolopoulou
  • Function : Author
S. Stoulos
  • Function : Author
R. Brandt
  • Function : Author
W. Westmeier
  • Function : Author
B.A. Kulakov
  • Function : Author
M.I. Krivopustov
  • Function : Author
A.N. Sosnin
  • Function : Author
M. Zamani Valasiadou
  • Function : Author

Abstract

High-energy protons in the range of 0.5–7.4 GeV have irradiated an extended Pb target covered with a paraffin moderator. The moderator was used in order to shift the hard Pb spallation neutron spectrum to lower energies and to increase the transmutation efficiency via (n,γ) reactions. Neutron distributions along and inside the paraffin moderator were measured. An analysis of the experimental results was performed based on particle production by high-energy interactions with heavy targets and neutron spectrum shifting by the paraffin. Conclusions about the spallation neutron production in the target and moderation through the paraffin are presented. The study of the total neutron fluence on the moderator surface as a function of the proton beam energy shows that neutron cost is improved up to 1 GeV. For higher proton beam energies it remains constant with a tendency to decline.

Dates and versions

in2p3-00089714 , version 1 (22-08-2006)

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M. Fragopoulou, M. Manolopoulou, S. Stoulos, R. Brandt, W. Westmeier, et al.. Spatial distribution of moderated neutrons along a Pb target irradiated by high-energy protons. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2006, 560, pp.571-576. ⟨10.1016/j.nima.2006.01.055⟩. ⟨in2p3-00089714⟩
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