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Abstract. Deuteron irradiation experiments were performed to measure two kinds of data for IFMIF accelerator structural materials. One is a measurement of deuteron-induced activation cross sections for prospective candidate materials, i.e., aluminum, vanadium, chromium, manganese, iron, nickel, copper, tantalum, tungsten and gold, in the energy range of 14-49 MeV. The other is a measurement of deuteron-induced activities of nuclide produced in SS316 and F82H by 39.5 MeV deuteron. It is found that most measured cross sections correspond with TALYS calculations rather than ACSELAM and it is confirmed that the activities in SS316 and F82H can be nearly evaluated within the accuracy of the experimental errors by using the present measured cross section data.

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