Effects of annealing temperature on morphology and thickness of samarium electrodeposited thin films

Abstract

34 publish or reproduce the published form of this manuscript, or allow 35 others to do so, for the United States Government purposes. The 36 Department of Energy will provide public access to these results of 37 federally sponsored research in accordance with the DOE Public Access 38 Plan (http://energy.gov/downloads/doe-public-access-plan).Abstract 53 Electroplated depositions of Sm were prepared using a vertical well-type electrodeposition unit 54 with an aqueous ammonium acetate electrolyte system, with an average deposition yield just 55 over 87%. The depositions were analyzed for morphology and thickness by scanning electron 56 microscopy (SEM) and chemical composition by energy dispersion X-ray spectroscopy (EDS) 57 and X-ray photoelectron spectroscopy (XPS) before and after firing. The depositions were fired 58 at 125 to 700 ºC, while varying the heating rate from 0.5 to 10 ºC/min in either an oxidizing or 59 reducing atmosphere. A heating rate of 10 ºC/min was slow enough to prevent disruption of the 60 deposition morphology during firing. A gas sweep enhanced the removal of any organic 61 substituents, with an oxidizing environment being more advantageous than a reducing 62 environment. 63 64 Introductions 65Actinide thin-films have gained significant attention over the last several decades for a myriad of 66 applications including accelerator bombardments [1][2][3], spectroscopy [4,5], and fission 67 fragment sources [6][7][8][9]. The Californium Rare Isotope Breeder Upgrade (CARIBU) at Argonne 68 157 X-ray photoelectron spectroscopy (XPS) was performed to obtain more detailed analysis of the 158 composition and binding of the depositions using a Thermo Scientific K-Alpha XPS with a 159 double-focusing hemispherical analyzer and a position-sensitive detector with 128 detector 160

Search for the heaviest atomic nuclei among the products from reactions of mixed-Cf with a Ca48 beam

“…In brief, with more details contained in [9], the REDC at ORNL has continued [27][28][29][30] to provide unique capabilities for the production of target material intended for use in studies of superheavy element synthesis. It was recognized that aged californium sources, in some cases more than 40 years, would provide a good source of target material for superheavy element (SHE) experiments due to its relative enrichment of isotopes with longer halflives than that of 252 Cf.…”