Vascon A, Runke J, Trautmann N, Cremer B, Eberhardt K, Düllmann CE. Quantitative molecular plating of large-area
242Pu targets with improved layer properties.
Appl Radiat Isot 2014;
95:36-43. [PMID:
25464174 DOI:
10.1016/j.apradiso.2014.10.002]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 09/23/2014] [Accepted: 10/02/2014] [Indexed: 10/24/2022]
Abstract
For measurements of the neutron-induced fission cross section of 242Pu, large-area (42cm2) 242Pu targets were prepared on Ti-coated Si wafers by means of constant current density molecular plating. Radiochemical separations were performed prior to the platings. Quantitative deposition yields (>95%) were determined for all targets by means of alpha-particle spectroscopy. Layer densities in the range of 100-150μg/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 electron microscopy 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.
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