Activation experiment with tungsten in fusion peak neutron field

Tungsten is the preferred material for the divertor plates of fusion devices and a constituent of reduced activation structural materials. Samples of pure tungsten were irradiated with D-T fusion neutrons. The radioactivity following irradiation was determined several times during decay by γ-spectroscopy. The results were analysed with the European Activation System. Ratios of calculated-to-experimental values for individual activities are discussed in connection with the expected activation performance of the material on fusion power plant conditions.