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  1. A new matrix for the ``ageless`` 21.6-keV {sup 151}Eu nuclear gamma ray Moessbauer source [electronic resource].

    Washington, D.C. : United States. Dept. of Energy. ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1993

    Moessbauer spectroscopy has been used over the past two decades to advance the study of europium compounds and alloys, primarily utilizing the 21.6-kev gamma ray emitted from beta decaying ¹⁵¹Sm. This isotope, which has a 87 year half-life, has been used in either a samarium fluoride (SmF³) or samarium oxide (Sm₂O₃) matrix. We now report a study involving, europium oxalate decahydrate (Eu2(C₂O₄)·10H₂O), europium fluoride EuF₃ and EuBe{sub l3} as absorbers at known thicknesses. Our data supports the view that Sm₂(C₂O₄)₃·H₂O will provide a better source matrix than either the fluoride or oxide due to the narrower linewidth and comparable ``f`` factor to ¹⁵¹SmF₃.

    Online OSTI

  2. COMPOUNDS OF DIVALENT-LANTHANIDES. PREPARATION, OPTICAL PROPERTIES, AND CRYSTAL STRUCTURE [electronic resource]

    Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1963

    Preparation of the sulfates, carbonates, and fluorides of divalent samarium, europium, and ytterbium is described. Crystallographic data from both x-ray and optical examination of the compounds are presented. Due to the instability of these plus (II) salts, the precision of the measurement is affected, but sufficient for characterization. A simple and convenient electrolytic method was devised to prepare the divalent sulfates. By metathetical reactions, carbonates and fluorides were prepared. The compounds were analyzed by a pyrohydrolytic method. (H.G.G.)

    Online OSTI

  3. Investigations at high temperatures [electronic resource] : Condensed-phase equilibria and vaporization studies with a mass spectrometer

    Washington, D.C. : U.S. Atomic Energy Commission ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1970

    The binary system Eu-Eu2O3 has been examined in detail over the composition range EuO to Eu2O3 at 1500°C.

    Online OSTI

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