Quantitative molecular plating of large-area 242Pu targets with improved layer properties

For measurements of the neutron-induced fission cross section of 242Pu, large-area (42cm2) 242Pu targets were prepared onTi-coated Si wafers by means of constant current density molecular plating. Radiochemical separations were performed prior tothe platings. Quantitative deposition yields (>95%) were determined for all targets by means of alpha-particles pectroscopy. Layer densities in the range of 100–150 μg/cm2 were obtained. The homogeneity of the targets was studied by radiographic imaging. A comparative study between the quality of the layers produced on the Ti-coated Si wafers and the quality of layers grown on normal Ti foils was carried out by applying scanning electronmicroscopy and energy dispersive X-ray spectroscopy. Ti-coated Si wafers resulted clearly superior to Ti foils in the production of homogeneous 242Pu layers with minimum defectivity.

VASCON Alessio;  RUNKE Jörg;  TRAUTMANN Norbert;  CREMER Bert;  EBERHARDT Klaus;  DÜLLMANN Christoph; 

2014-12-10

PERGAMON-ELSEVIER SCIENCE LTD

JRC92401

0969-8043,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC92401,   

10.1016/j.apradiso.2014.10.002,