Titanium Evolution and Nickel Restoration Under Neutron Irradiation in Ni/Ti Multilayers
نویسندگان
چکیده
Nmi multilayers are used as supermirrors for neutron guides. These multilayers are submitted to neutron irradiation. In order to determine the effect of irradiation on supermirrors performances we studied Ni/'Ti multilayers irradiated with thermal neutrons. We present here the results obtained by neutron reflectivity, X-ray diffraction and EXAFS on one sample. It has been found that the supermirrors performances are not reduced. Nevertheless, Ti shows an evolution from the hcp structure to another crystalline state while Ni layers show a restoration of the fcc structure.
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