الفهرس Only 14 pages are availabe for public view
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Abstract
Far si~ulating radiation damage of fusion reactors with high energetic neutrons the knowledge of neutron
cross-sections has to be improved especially above 20 Mev. In this energy region, the energy >nuclear cascade reactions. Around the fusion peak at 15
Mev about thirty percent of the damage energy in iron are
transferred by cascade reactions with a large (n,2n)-
contribution. Above 20 MeV the damage energy by cascade
reactions dominates.
For neutron cascade reactions in iron the energy
transfer has been determined for each type of cascade
reaction separately. Using the evaporation model the
energy spectra of the heavy recoil atoms as well as that
of the smaller emitted particles were calculated with a
Monte Carlo procedure.
The cascade code SPALL-S developed at IKE, University
of Stuttgart has been used and compared with available
neutron and charged particle emission spectra data up to
20 MeV. The satisfying agreements obtained allowed us to
extend the code up to 40 M~ including energy transfer data
of neutron reactions in iron such as kerma factor, damage
energy cross-section, and displacement cross-section have
been e~aluated in several neutron envi~on~ents and corpared