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Characterization of a samarium thin film deposited on a stainless steel substrate using electrodeposition was carried out with a Thermo Scientific K-Alpha X-ray photoelectron spectrometer. Two types of samarium electrodeposition samples were studied, one as-deposited and one heated to 700 °C in an air atmosphere. Survey scans include peaks coming from the stainless steel substrate, such as Fe and Cr. An x-ray photoelectron spectroscopy (XPS) survey spectrum, Sm 3d, C 1s, and O 1s narrow scans are shown. It was determined, using XPS, that the heating process decomposed the deposited Sm acetate to Sm2O3.

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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

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