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  1. No Access

    Article

    Hyperfine field at strontium nuclei in nickel

    The hyperfine field Hhf for SrNi has been measured by the TDPAD method using recoil implantation of an 8+ isomer of86Sr in Ni following heavy ion reactions. Two fieldsites populated about equally with Hhf(1)=−38....

    P. Raghavan, Z. Z. Ding, R. S. Raghavan in Hyperfine Interactions (1983)

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    Article

    Iron(II)-dioxygen interaction detected by Mössbauer and ESR spectroscopy

    The electronic structure of Fe(II) substituting Zn in Horse Liver Alcohol Dehydrogenase was investigated by Mössbauer spectroscopy at various temperatures and applied magnetic fields and by spin Hamiltonian an...

    E. Bill, X. Q. Ding, C. Haas, H. Winkler, A. X. Trautwein… in Hyperfine Interactions (1988)

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    Article

    Investigation of some anomalous hemoglobins

    We have studied some anomalous hemoglobins by Mössbauer spectroscopy. We found that there is a correspondence between the physical conditions of the respective patients and the additional components of the Mös...

    X. Q. Ding, Y. F. Hsia, S. Y. Shi, R. C. Liu, S. X. Wang… in Hyperfine Interactions (1988)

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    Article

    Characterization of doped Nd-based superconductors

    Y-, Dy-, and Gd-doped neodymium (Nd) superconductors (RE0.1Nd0.9Ba2-Cu3Oy) exhibited sharp resistivity transitions at 92 K. DC susceptibility measurements gave a common curve with diamagnetic onsets at 93 K and t...

    W. D. Arnett, D. R. Zint, C. E. Hamrin Jr.… in Journal of Superconductivity (1988)

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    Article

    A Mössbauer study on the interaction of active component and support

    In order to directly determine and compare the interaction strength between one active component (Fe2O3) and six different supports, Mössbauer spectra of the six catalysts under room temperatures 373K, 473K and 5...

    Ding Yingru, Yao Jianhua, Yang **elong, Chang Kaihua in Hyperfine Interactions (1988)

  6. No Access

    Chapter and Conference Paper

    Ionization dynamics of van-der-Waals clusters

    The ionization process of homogeneous and heterogeneous van-der-Waals clusters has been investigated using various ionization methods (electron bombardment, charge exchange, photoionization methods), and diffe...

    A. Ding in Small Particles and Inorganic Clusters (1989)

  7. No Access

    Article

    Spin coupling in iron proteins and model complexes

    Transition metal ions are essential for the specific function of many biomolecules, like transport and activation of small molecules, electron transfer, etc. Their active sites contain (i) single paramagnetic ...

    E. Bill, X. -Q. Ding, H. Winkler, A. X. Trautwein, U. Gonser in Hyperfine Interactions (1989)

  8. No Access

    Article

    Oxoferryl porphyrin cation radicals in model systems: Evidence for variable metal-radical spin coupling

    Magnetic properties of frozen solutions of highly oxidized iron porphyrin complexes were investigated by EPR and Mössbauer spectroscopy. The Mössbauer spectra, recorded at low temperatures in various magnetic ...

    E. Bill, E. L. Bominaar, X. -Q. Ding, A. X. Trautwein, H. Winkler… in Hyperfine Interactions (1990)

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    Article

    Mössbauer study of a novel binuclear Fe(II/III) delocalized-valence compound

    In this paper, we briefly summarize the main conclusions of the Mössbauer analysis of [L2Fe2(μ-OH)3] (ClO4)2·2CH3OH·2H2O with L=N,N',N"-trimethyl-1,4,7-triazacyclononane, a novel dimeric iron compound, which poss...

    X. -Q. Ding, E. L. Bominaar, E. Bill, H. Winkler, A. X. Trautwein… in Hyperfine Interactions (1990)

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    Article

    Compound formation in Ni/In thin film systems

    Interface compound formation in Ni/In film couples has been studied by means of the PAC method using radioactive111In probe atoms. Subsequent occurrence of the compounds Ni10In27, Ni2In3, NiIn and Ni3In has been ...

    R. Platzer, U. Wöhrmann, X. L. Ding, R. Fink, G. Krausch… in Hyperfine Interactions (1990)

  11. No Access

    Article

    Hyperfine-interaction studies of surfaces

    Applications of hyperfine-interaction techniques, like NMR, PAC and Mößbauer spectroscopy, to well-characterized surfaces are discussed and the present knowledge of surface hyperfine fields is reviewed. Measur...

    G. Schatz, X. L. Ding, R. Fink, G. Krausch, B. Luckscheiter… in Hyperfine Interactions (1990)

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    Article

    Magnetic hyperfine fields in ultrathin Ni films on Cu(100)

    The magnetic hyperfine field was measured at 111In(111Cd) probe atoms in ultrathin Ni films epitaxially grown on Cu(100) utilizing the perturbed γγ-angular correlation (PAC) method. The behaviour of the hyperfine...

    J. Voigt, X. L. Ding, R. Fink, G. Krausch, B. Luckscheiter, R. Platzer… in Applied Physics A (1990)

  13. No Access

    Chapter

    A Result on the Global Existence for Heat Flows of Harmonic Maps from D 2into S 2

    The question whether a solution of the heat equation for harmonic maps between Riemannian manifolds always exists globally or it may blow up in finite time was originally asked by Eells and Sampson ([E-S]). There...

    Kung-Ching Chang, Wei-Yue Ding in Nematics (1991)

  14. No Access

    Chapter

    Spectroscopic Studies of Spin State and Electron Delocalization in a Binuclear Mixed-Valence Fe(II/III) Complex

    A brief historical survey is given of the “doubleexchange” interaction, by which the spins of the paramagnetic centers in mixed-valence systems are ferromagnetically coupled through quantum-mechanical electron...

    E. L. Bominaar, X.-Q. Ding, E. Bill… in Mixed Valency Systems: Applications in Che… (1991)

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    Chapter

    Blow-Up Analysis for Heat Flow of Harmonic Maps

    It is investigated that in higher dimensions the heat flow of harmonic maps between two compact Riemannian manifolds blows up in a finite time if the initial map is in some nontrivial homotopic class with smal...

    Chen Yunmei, Ding Wei-Yue in Nematics (1991)

  16. No Access

    Article

    Microwave properties of highly oriented YBa2Cu3O7-δ superconducting thin films

    We have performed millimeter-wave frequency (94 GHz) measurements on high-quality YBa2Cu3O7-δ superconducting films on yttrium-stabilized (100) ZrO2 and MgO substrates. The ∼0.2μm thin films fabricated by magnetr...

    Bao Jia-shan, Zhou Shi-**, Wu Ke-qing, Lou Wei-gen… in Journal of Superconductivity (1991)

  17. No Access

    Chapter

    Charge Separation Reactions of Doubly Charged Xe Clusters

    An experiment has been designed to investigate the double photoionization of Xe-Clusters. TEPICO and PIPICO techniques have been applied to investigate the Coulomb fragmentation of doubly charged Xe clusters. ...

    M. Fieber, E. Holub-Krappe, J. Lehmann… in Physics and Chemistry of Finite Systems: F… (1992)

  18. No Access

    Article

    Modulations of exchange coupling in oxoferrylporphyrin cation radical complexes detected by Mössbauer and EPR measurements

    Oxoferrylporphyrin cation radical complexes were generated using the prophyrin dianions: tetrakis 2,6-dichlorophenyl (TDCPP) and tetrakis 2,4,6-trimethoxyphenyl (TTMPP). Spin coupling between ferryl iron (S=1)...

    E. Bill, X.-Q Ding, E. L. Bominaar, Ch. Butzlaff, A. X. Trautwein… in Hyperfine Interactions (1992)

  19. No Access

    Article

    Spectroscopic and structural investigations of the ferrous and ferric high-spin state of a “picket—fence” porphyrinato acetato iron complex. A refined model for the P460 center of hydroxylamine oxidoreductase

    Mössbauer investigations were performed in the ferrous and ferric form of the ‘picket-fence’ porphyrinato acetato iron complex |Fe(CH3CO2) (TPpivP)|1−,0 at temperatures varying from 1.5–200K and in fields of 0–6....

    E. Bill, E. L. Bominaar, X. -O. Ding, J. Fischer, A. Gismelseed… in Hyperfine Interactions (1992)

  20. No Access

    Article

    Magnetic and57Fe Mössbauer studies of intermetallic compounds R2 (Fe1−x−y Ni x Co y )17 (R=Y,Gd,Tb,x=0,0.10, 0.20,y=0,0.05, 0.10)

    Mössbauer studies of R2(Fe1−x−y Ni x Co y )17 showed that the transferred hyperfine field at Fe nuclei due to magnetic r...

    Chun-Li Yang, Fa-Shen Li, Wen-Ding Zhong in Hyperfine Interactions (1992)

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