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Deuteron-induced reactions at low and medium energies: Consistent direct and statistical model analyses

C. Project description

C1. Scientific context and motivation.

The deuteron-induced reactions at low and medium energies have a great importance within several on-going strategic research programmes at large-scale international level. Their accurate knowledge is critical in order to prepare for the construction of a demonstration fusion power plant including the development of fusion materials and a number of key technologies. The task of selecting and validating the best materials for constructing fusion power reactors is a priority of the European Commision (EC) Research Programme and the corresponding EC domestic agency Fusion for Energy (F4E). Moreover, it is of large interest the assessment of the deuteron-induced radioactivity of structural components of the International Fusion Material Irradiation Facility (IFMIF) related to the ITER fusion program. This interest follows the fact that IFMIF will use a particle accelerator to produce a large neutron flux which will subject candidate materials to similar conditions expected to be experienced by the inner wall of a full-scale fusion reactor. On the other hand, the deuteron- induced reactions are also essential for the Neutron For Science (NFS) project development at SPIRAL-2, involving deuteron beams, and focused on both academic research and applied physics.

Recent calculations of the IFMIF materials deuteron-induced activation, following the use of intense beams of high--energy deuterons striking a flowing lithium target1, were based on the preliminary deuteron part of the European Activation File (EAF) library2. They have shown that the deuterons are much more important than the neutrons by a factor of about 70 for the ratio of the deuteron- and neutron-induced activity of elements other than lithium3. It is also known that the actual calculations and experimental data for deuteron-induced reaction cross sections are less extensive and mature than for neutrons3. Consequently, there is now a large attention paid to further measurements as well as to improved model calculations becoming finally able to describe the experimental data in order the deuteron data libraries to approach the standard of the established neutron ones.

The actual need of high accuracy deuteron nuclear data has been triggered the F4E call F4E-2008-GRT-014 (ES-AC) with the action title "Improvement of nuclear data, development of tools and experimentals/validation in support of ITER activities", with reference to the following actitivities within the F4E Work Programme: "ITER > Engineering Support > Nuclear Data". At the same time the IAEA-Vienna Nuclear Data Section has the initiative of a Coordinated Research Project Fusion Evaluated Nuclear Data Library FENDL 3 with the overall objective to improve the status of the nuclear data bases for assessments of radiation damage to structural components of fusion devices in advanced stages of design and planning.

  • [1] A. Ibarra et al., Fusion Eng. Design 82, 2422 (2007).
  • [2] R.A. Forrest et al., Report UKAEA FUS 535, UKAEA Culham Science Centre, March 2007.
  • [3] R.A. Forrest and I. Cook, Fusion Eng. Design 82, 2478 (2007).