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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Localized modes and the Mossbauer effect

Wells, David Ernest January 1965 (has links)
Two types of experiments involving the Mossbauer atom as a dilute impurity in a host lattice are discussed. For a zero-phonon experiment with Fe⁵⁷ in Pt¹⁹⁵ at room temperature, the expected shift of the central Mossbauer peak is [symbol omitted]/3000. The minimum time required to experimentally determine this shift to within 10% is found to be 16 weeks of counting with a 5 millicurie source. For a one-phonon experiment with Fe⁵⁷ in Pt¹⁹⁵, the count rate due to resonance scattering is found to be 3.14 x 10⁻⁴/sec., and the count rate due to Rayleigh scattering 2.2 x l0⁻²/sec. The case of Fe⁵⁷ in Be⁹ is also discussed. An air trough Mossbauer shift spectrometer constructed to perform the zero-phonon experiment is described. Vibrations present in this apparatus, making it inadequate for experimental work, are discussed. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
12

Nanomatériaux magnétiques à haute performance à base de métal de transition et de terre rare carbures Sm-Fe-Ga /

Dorolti, Eugen Djega-Mariadassou, Catherine. January 2005 (has links) (PDF)
Thèse de doctorat : Physique. Sciences des matériaux : Paris 12 : 2005. / Titre provenant de l'écran-titre. Bibliogr. en fin de chapitres.
13

EuCu2(Ge1-xSix)2 a model system to study charge lluctuations across a quantum phase transition

Ahmida, Mahmoud Abdelrazek January 2009 (has links)
Zugl.: Köln, Univ., Diss., 2009
14

Analysis of iron oxidation in garnets /

Emerson, Erica A. January 2008 (has links) (PDF)
Undergraduate honors paper--Mount Holyoke College, 2008. Dept. of Geology and Geography. / Includes bibliographical references (leaves 119-122).
15

Magnetic ordering in the two dimensional antiferromagnet, FePS₃

Rule, Kirrily January 2004 (has links)
Abstract not available
16

Préparation et caractérisation de catalyseurs d'hydrotraitement des fractions pétrolières et de combustiblies obtenus à partir de la biomasse végétale

Altafulla, Jonathan Hubaut, Robert. Scott Algara, Carlos Eduardo January 2007 (has links)
Reproduction de : Thèse de doctorat : Structure et dynamique des systèmes réactifs : Lille 1 : 2005. Reproduction de : Tesis doctoral : Química : Universidad Central de Venezuela, Facultad de Ciencias : 2005. / Thèse en cotutelle. N° d'ordre (Lille 1) : 3605. Texte en espagnol, introduction en français. Résumé en français, espagnol et anglais. Titre provenant de la page de titre du document numérisé. Bibliogr. à la suite de chaque chapitre.
17

Stabilisation de degrés d'oxydation élevés et configurations électroniques inusuelles d'éléments de transition dans les oxydes : influence du proche environnement.

Buffat, Bernard, January 1900 (has links)
Th.--Sci.--Bordeaux 1, 1984. N°: 802.

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