title: Quantitative molecular plating of large-area242Pu targets with improved layer properties.
abstract: For measurements of the neutron-induced fission cross section of242Pu, 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/cm2were 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 homogeneous242Pu layers with minimum defectivity.
authors.affiliation: Institute of Nuclear Chemistry, Johannes Gutenberg University Mainz, 55099 Mainz, Germany; Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany. Electronic address: vascon.alessio@jaea.go.jp.
authors.forename: A
authors.initials: A
authors.lastname: Vascon
authors.affiliation: SHE Chemistry Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Runke
authors.affiliation: Institute of Nuclear Chemistry, Johannes Gutenberg University Mainz, 55099 Mainz, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Trautmann
authors.affiliation: European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Cremer
authors.affiliation: Institute of Nuclear Chemistry, Johannes Gutenberg University Mainz, 55099 Mainz, Germany; SHE Chemistry Research Section, Helmholtz Institute Mainz, 55099 Mainz, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Eberhardt
authors.affiliation: Institute of Nuclear Chemistry, Johannes Gutenberg University Mainz, 55099 Mainz, Germany; SHE Chemistry Department, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany; SHE Chemistry Research Section, Helmholtz Institute Mainz, 55099 Mainz, Germany.
authors.forename: Ch E
authors.initials: CE
authors.lastname: Düllmann
keywords: (242)Pu; Improved layer properties; Large-area targets; Molecular plating; Quantitative deposition yield; Scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDX)