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Cross sections of spallation reactions of 181 Ta, 197 Au, 207 Pb, 209 Bi, 232 T h, 238 U heavy metals induced by deuterons with energy of 2, 2.94, 3.5 GeV were determined. The deuteron beams were extracted from the Nuclotron accelerator at the Laboratory of High Energy Physics, JINR, Dubna, Russia. Spallation reactions cross sections were measured using solid state nuclear track detectors (SSNTD) and activation gamma-spectroscopy. Due to the lack of cross sections data in the range of high energies the experimental results could be added in the international database. PoS(Baldin ISHEPP XXII)053Determination of heavy metal spallation reactions cross sections Volha Bukhal

The ratios of the average 239 Pu and 237 Np fission cross-sections to the average 235 U fission crosssection were determined experimentally. Experiments with U-assembly QUINTA were carried out using the accelerator complex "Nuclotron" of the Veksler and Baldin Laboratory of High Energy Physics (VBHEP) of the Joint Institute for Nuclear Research (JINR) (Dubna, Russia). Experiments were conducted in the frame of the project "E&T RAW". It is based on so called Relativistic Nuclear Technology (RNT) proposed recently [1] by one of the institutions (CPTP "Atomenergomash", Moscow) participating in "E&T RAW" collaboration. The assembly was irradiated by deuterons and carbon ions with energies 2 and 4 GeV/A. Comparison between experimental results and MCNPX calculations are presented. Accumulation and burning of plutonium, neptunium and others isotopes influences the neutron balance of the assembly that attracts an interest in such measurements.

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