bluuebunny/crossref_metadata_2025_split huggingface dataset:
Geometrie Unification of Classical Gravitational and Electromagnetic Interaction in Five Dimensions: a Modified Approach
Authors: Osterhage Wolfgang W. 
Published: February 2015

Abstract
A unification of the gravitational with the electromagnetic interaction within a classical framework is proposed. It is based on a V5-geometry, with x5 = q/m. The sole source term is mechanical stress energy, positioned along x5. The trajectories of testbodies are placed in V4 (x5 = const)-slices. The final field equation couples a geometric G-tensor to mechanical stress energy, its momentum with respect to x5 and the change of this momentum with proper time τ.
The Rotational Zeeman Effect of Nitrosylfluoride
Authors: Rohwer F. , Guarnieri A. 
Published: February 2015

Abstract
The rotational Zeeman effect of low J transitions of Nitrosylfluoride in the centimetre and millimetre waveranges has been investigated with fields up to 24 kG.
g-Factors with signs could be determined using the effect of the nitrogen quadrupole coupling interactions. A value for the partial susceptibility contribution of the nitrogen -N= has been estimated.
Electrochemical Determination of Phase Diagrams and Thermodynamic Data of Multi-Component Systems
Authors: Weppner W. , Li-chuan Chen , Piekarczyk W. 
Published: February 2015

Abstract
The coulometric titration technique is extended to treat general cases of systems of any number of components. Complete equilibrium phase diagrams and thermodynamic properties are obtained from readily and precisely measurable electrical quantities, employing only a small number of samples. General equations are derived which directly relate the cell voltage to the standard Gibbs energies, enthalpies and entropies of formation of all phases involved without the necessity of considering specific cell reactions. The application of the technique to the ternary system Cu-Ge-O is demonstrated.
Magnetic and Quadrupole Relaxation in Aqueous BeF2-Solutions
Authors: Jena H. , Kreische W. , Maar H. U. , Niedrig H. , Reuter K. , Wrobel B. 
Published: February 2015

Abstract
In aqueous BeF2-solutions of different concentrations and therefore different viscosities the magnetic relaxation time T1 was measured as a function of the viscosity over a wide range by pulsed NMR-technique. For small viscosities a linear dependence of T1 on the viscosity was observed as predicted by theoretical calculations. Since the ground state spin of 19F is I = 1/2, the quadrupole moment vanishes. For observing quadrupole relaxation of the F-nuclei, one has to use an excited level. With the time differential perturbed angular distribution method (TDPAD) we observed the quadrupole relaxation time TRel of 19F in aqueous BeF2-solutions.
Der Einfluß lokaler Konzentrationsfluktuationen in binären flüssigen Mischungen von CH3I und CDCl3 auf das Profil von Molekülschwingungs-Banden
Authors: Döge G. , Arndt R. , Buhl H. , Bettermann G. 
Published: February 2015

Abstract
The Raman band shapes of ν1 of CDCl3 and CH3I in the pure liquids and their mixtures are studied. The CH3I mode shows a broadening in the mixtures with a maximum at a mole fraction of about 0.5, whereas the ν1 band of CDCl3, shows a splitting in the mixture. The different behaviour of the two Raman bands is discussed briefly.
Diffusion Coefficients of Aromatic Hydrocarbons in Their Lowest Triplet State: Anthracene in Hexane, Octane, Hexadecane, Perfluorohexane, and Methylcyclohexane; Pyrene and 9,10-Di-phenylanthracene in Hexane
Authors: Meyer E. Georg , Nickel Bernhard 
Published: February 2015

Abstract
An experimental method is described which allows the determination of the diffusion coefficient D of an aromatic hydrocarbon in its lowest and metastable triplet state T1 with an absolute accuracy of ±5%. D was determined at 25 °C. With anthracene the temperature-dependence of D was measured from 0°C to 60°C in hexane and from 20°C to 89°C in hexadecane; it was found to be in good but not perfect agreement with the Stokes-Einstein equation. With the investigated systems, D of molecules in T1 is estimated to be at most 10% smaller than D of molecules in the ground state. No evidence for the formation of triplet excimers was found. Some applications of the method are proposed, and in this connection some questions concerning the kinetics of diffusion-controlled reactions of molecules in T1 and the existence of triplet excimers are discussed.
Zur Diffusionskinetik in Ionenaustauscherharzen Selbst-und Austauschdiffusion von Alkali-und Erdalkaliionen / The Diffusion Kinetic in Ionic Resin Exchangers. Self- and Exchange-Diffusion of Alcaliions
Authors: Miekeley N. , Fernandes P. C. S. 
Published: February 2015

Abstract
Heterogeneous isotope exchange rates of Na+, Ca+, Ba2+ and Sr2+ in mono-and biionic resin exchangers (Merck I) have been measured under conditions where diffusion is rate determining. For the self-diffusion of Na+, Ba2+ and Sr2+ linear Dt/r2 - f(t)-curves are obtained. Cs-isotope exchange shows non-ideal diffusion kinetics. In mixed Ba-exchangers the self-diffusion coefficients of Ba2+ and Sr2 depend on the ionic composition of the exchanger phase. Ion exchange rates have been measured for Ba/Sr2+ -exchange and its reversal. Computed curves are presented using Helfferich’s theory of ion exchange and an extended treatment with activity correction terms and concentration dependent self-diffusion coefficients. Computed and experimental curves are discussed.
Photoelectric Determination of V0-Values in Solid Rare Gases
Authors: Zdrojewski W. von , Rabe J. G. , Schmidt W. F. 
Published: February 2015

Abstract
Electronic conduction state energies Fo were measured by photoelectric effect for solid xenon (F0 =— 0.57 ± 0.05 eV, 160 K), solid krypton (F0 = -0.40 ± 0.05 eV, 114 K), and solid argon (Fo =— 0.0 ± 0.05 eV, 82 K). A novel photo cell was employed which eliminated some of the problems encountered in photoelectric work with rare gas solids.
On the Internal Motion of Iron Chloride Molecules
Authors: Hargittai Magdolna , Brunvoll Jon 
Published: February 2015

Abstract
The vibrationally averaged structures of the iron chloride molecules may considerable differ from their equilibrium structure as a consequence of low-frequency large amplitude vibrations. Mean amplitudes of vibration and perpendicular amplitude correction terms have been calculated for FeCl2 and FeCl3. Mean amplitudes of vibration have also been calculated for D2h (equilibrium structure) and C2v (vibrationally averaged structure) symmetry forms of Fe2Cl4 and Fe2Cl6-The applicability of normal coordinate analysis for high temperature systems with large amplitude motion is discussed.
Viscoelasticity Associated with Molecular Alignment
Authors: Hess S. 
Published: February 2015

Abstract
Viscoelasticity as it becomes apparent through the oscillatory motion in flow relaxation experiments is studied theoretically for liquids and liquid solutions containing nonspherieal particles. The coupling between the viscous flow and the molecular alignment which underlies the flow birefringence gives rise to a viscoelastic behavior. The relevant time scale is determined by the orientational relaxation time rather than the (often much shorter) Maxwell relaxation time. The possible relevance of the present theory for the viscoelastic behavior of some dilute aqueous detergent solutions is discussed.
A Thermogravimetric and NMR Study of β-Aluminas
Authors: Flor Giorgio , Bjorkstam John L. , Villa Marco 
Published: February 2015

Abstract
The Na+ tracer diffusion coefficient and the 27Al NMR spin lattice relaxation time in Na β-alumina display an anomalous temperature dependence near 470 K. These phenomena are related to absorption of water which takes place when the temperature is decreased below 470 K. Water absorption processes in pure and partially substituted β-aluminas are studied by thermogravimetric analysis. Their effects upon conductivity are qualitatively discussed.
Optical Spectroscopy of Mixed Metamagnetic FexCo1-xCl2 Crystals
Authors: Seitz Friedrich , Wood Terence E. , Day Peter 
Published: February 2015

Abstract
Electronic absorption spectra are reported for single crystals of composition FexCo1-xCl2 as a function of temperature from 300 K to 4 K. A broad band at 436 nm is assigned to Fe (II) → Co (II) charge transfer and the temperature dependence of its intensity is related to the magnetic exchange between the ions. The 2T1g(2H) excitation of Co (II) in the mixed crystals has an unusual temperature dependence which correlates with the Néel temperature.
High Resolution Spectroscopy of the υ5 Band of Fluoroform-d (CDF3) by the Laser Stark Method
Authors: Ibisch E. , Andresen U. 
Published: February 2015

Abstract
The υ5 perpendicular band of CDF3 has been studied by means of laser Stark spectroscopy using the 10.4 μm band of the 12C 16O2 and the 12C 18O2 laser as infrared radiation sources. The assignment was established for more than 500 resonances. The majority of them was measured in saturation dip technique. A least-squares analysis of the Stark spectrum, together with recent microwave and infrared results, gave the rotation-vibration parameters and the dipole moment of the υ5 state. A brief description of the apparatus is also given.
Chlorine NQR on Derivatives of Chloral
Authors: Hashimoto Masao , Weiden Norbert , Weiss Alarich 
Published: February 2015

Abstract
The 35Cl-NQR spectrum of several derivatives of chloral, Cl3CCHO, was studied in the ranee 77 K ≦ T ≦ Tm. By use of the spin echo double resonance technique a relative assignment of the resonances to different Cl3C-groups within one crystallized compound was possible. The solid compounds studied are: High temperature phase of chloral hydrate, Cl3CCH(OH)2; parachloral, (Cl3CCHO)3, (α-and ß-isomer); the two phases of chloral hemihydrate Cl3CCHO · 1/2 H2O; chloralide (II); chloralhemithiohydrate, Cl3CCHO · 1/2 H2S. The structure of the molecules in the solid state and the fade out of the NQR resonances are discussed.
Schwingungsberechnungen des käfigstrukturierten P4S3
Authors: Cyvin S. J. , Brunvoll J. , Cyvin B. N. , Somer M. , Brockner W. 
Published: February 2015

Abstract
The P4S3 molecule is supposed to have a cage-structure of C3V symmetry. A normal coordinate analysis for this molecule was performed, based on a very simple initial force field with three numerical parameters and valence coordinates including redundancies. A complete set of independent symmetry coordinates is given. The force field was refined by adjusting the symmetry force constants to fit exactly a set of observed frequencies. This final force field was used to calculate the first-order Coriolis coupling coefficients and the mean amplitudes of vibrations. The standard thermodynamics functions from spectroscopic data are also given.
Calculation of Molecular Constants for the 1∑+ Ground States of the NeH+ and KrH+ Ions
Authors: Rosmus P. , Reinsch E.-A. 
Published: February 2015

Abstract
Potential energy and dipole moment functions have been calculated for the ground states of the NeH+ (1.0 ≦ R ≦ 15 a. u.) and the KrH+ (1.6 ≦ R ≦ 20 a. u.) ion from highly correlated SCEP/VAR and SCEP/CEPA electronic wave functions. The following spectroscopic constants have been derived: Ne20H+ re = 0.996 ± 0.003 Å, ωe = 2896 ± 20cm-1 , D0(Ne + H+) = 2.10 ± 0.05 eV; Kr84H+ re = 1.419 ± 0.003 Å, ωe = 2561 ±20 cm-1 , D0(Kr + H+) = 4.65 ±0.05 eV. The Einstein transition probability coefficients of spontaneous emission have been calculated for all transitions v ≦ 5 of Ne20H+, Ne20D+, Kr84H+ and Kr84D+, respectively.
Recombination Constants Calculation of Reactions between Fluorine Atoms and O2, CO, NO2, SO3, FSO3, ClO2, NF2, and CIF
Authors: Jubert A. H. 
Published: February 2015

Abstract
Recombination constants for reactions between fluorine atoms and O2, CO, NO2, SO3, FSO3, ClO2, NF2 and CIF were calculated by means of a method developed by J. Troe. N2 was used as bath gas and a temperature of 300 K was considered. The following values were obtained: 1.7 × 1016 , 9.2 × 1016 , 2.2 × 1017 , 7.0 × 1018 , 1.7 × 1019 , 2.6 × 1017 , 1.0 × 1017 , 2.3 × 1016 cm6 mol-2 s-1 respectively.
Die Lösungsmittelabhängigkeit der Elektronenspektren und die Änderung der Dipoleigenschaften N-substituierter Acridone bei elektronischer Anregung / The Solvent Dependence of the Electronic Spectra and the Change of the Dipole Properties of N-Substituted Acridones at Electronic Excitation
Authors: Siegmund M. , Bendig J. 
Published: February 2015

Abstract
The absorption and fluorescence spectra of acridone, N-methylacridone and N-phenylacridone are measured at 298 K for 35 solvents of different polarity. For the long wave 1La-transition, which shows a distinct positive solvatochromism, the oscillator strenght and the natural fluorescence lifetime are calculated. The change of the dipole moment (pd), determined from the Stokes’ shift as a function of solvent polarity, is nearly parallel to that of the ground state (pg). The absolute values and directions of pg and pe confirm the increasing polar character of the S1-state within the sequence N-phenylacridone, acridone and N-methylacridone. These values are used for an interpretation of the charge distribution and solvatation of the S0- and S1-states. By consideration of the solvent relaxation and the activation energy of the temperature dependent S1-T2 intersystem crossing process it is shown that in addition to the decrease of the S1-energy with increasing solvent polarity the T2-energy increases relative to S0, especially in the case of protic solvents.
Equivalence of the Variational Criteria in the Calculation of the Nuclear Spin-Spin Coupling Constant of HD
Authors: Trivedi H. P. 
Published: February 2015

Abstract
Using symmetry arguments it is shown that the variation of the self coupling, the cross coupling and the total second order energy are equivalent criteria for the calculation of the nuclear spin-spin coupling constant of HD and larger symmetric molecules. A previously given condition guaranteeing this equivalence is shown to be unnecessarily restrictive.
Quantum Statistical Derivation of Rate Equations for Electronic Processes in Polar Crystals with External Electric Field
Authors: Stumpf H. , Kleih W. 
Published: February 2015

Abstract
Applying the Nakajima-Zwanzig method to the von Neumann equation of a system of interacting electrons and nuclei, etc., and evaluating the Pauli-Master equation according to Rieckers-Stumpf, we obtain a system of reaction equations for electron-phonon-photon processes in a polar crystal. Further elaboration of these reaction equations leads to rate equations for electrons which include impurity center processes as well as conduction band processes in an external electric field. If the conduction band processes run faster than the other processes, the rate equations can be reduced to a Boltzmann equation with drift term for the conduction electrons, coupled to rate equations for impurity center electrons where the number of conduction electrons must not be conserved. Furthermore, the basic problem of electronic state formation in external fields is discussed, the corresponding interaction terms are derived and a functional for the calculation of "bound" states in external fields is given.
Structure Factors of Liquid Cu-Pb Alloys by Neutron Diffraction
Authors: Lamparter Peter , Steeb Siegfried 
Published: February 2015

Abstract
By means of neutron diffraction the structure factors and pair correlation functions of five Cu-Pb alloys, Cu, and Pb in the liquid state have been determined. The nearest neighbour distances have been obtained. The marked effect of small angle scattering with the melt with critical composition (65 at % Cu) is a proof for microsegregation tendency. By comparison with a segregation model for the structure factor the short range order parameter has been derived for melts with 65 and 35 at % Cu, respectively.
Local Instabilities of Quantum Trajectories in Non-Linear Dynamical Systems
Authors: Brickmann J. 
Published: February 2015

Abstract
Local instability of wave packets is related to an exponential increase of the second moments of the components ⊿Pi2 and ⊿Qi2 of the momentum and position operator as a function of the expectation values <Pi> and <Qi>• Equations of motion for ⊿Pi2 and ⊿Qi2 are derived. In the quasiclassical limit, the instability criterion approaches the Toda-Brumer criterion [1, 2] for classical trajectories.
Viskositäts-und Lösungsmittelabhängigkeit der Fluoreszenzanisotropie und der Lebensdauer von p-Terphenyl
Authors: Kawski A. , Kojro Z. , Alicka M. 
Published: February 2015

Abstract
The fluorescence anisotropics (FA) r and the lifetimes of p-terphenyl in different solvents have been measured, the effective volumes and the rotational relaxation times being determined. The deviation from the linear dependence of 1/r on 1/η (η-viscosity of the solvent) may explained by the length of the p-terphenyl molecule. The FA measurements were carried out by a method with an Arago compensator, a new method of the automatization of measurements being employed.
Scattering on Magnetic Monopoles
Authors: Petry Herbert-Rainer 
Published: February 2015

Abstract
The time-dependent scattering theory of charged particles on magnetic monopoles is investigated within a mathematical frame-work, which duely pays attention to the fact that the wave-functions of the scattered particles are sections in a non-trivial complex line-bundle. It is found that Möller operators have to be defined in a way which takes into account the peculiar long-range behaviour of the monopole field. Formulas for the scattering matrix and the differential cross-section are derived, and, as a by-product, a momentum space picture for particles, which are described by sections in the underlying complex line-bundle, is presented.
EPR Study of Mn2+ in Hg(ClO4)2 · 6H2O Single Crystals
Authors: Jain Viraal Kuraar 
Published: February 2015

Abstract
The electron paramagnetic resonance of Mn2+ in Hg(ClO4)2 · 6H2O has been studied at X-band at 298 K and 77 K. Mn2+ is found to substitute Hg 2+ . The spectra have been analysed using the spin-Hamiltonian appropriate for trigonal symmetry. From the unequal separations between the Δm = ± 1 doublets in M = + 1/2 → - 1/2 transitions, the value of the axial part of the quadrupole coupling constant is determined. The observed doublet separations of forbidden hyperfine transitions in M = + 1/2 → - 1/2 are in good agreement with those cal-culated.
On Dielectronic Recombination in Some Coronal Ions
Authors: Mital H. P. , Narain U. 
Published: February 2015

Abstract
Dielectronic recombination rate coefficients for some ions found in the solar corona have been investigated in the temperature range 20-1000 eV using two different expressions. A comparison has also been made with the corresponding radiative recombination rate coefficients.
On the Thermal Behaviour of the n.C13 -n.C 20 Rubidium Soaps
Authors: Cingolani A. , Sanesi M. , Franzosini P. 
Published: February 2015

Abstract
The odd and even long-chain rubidium soaps from tridecanoate to eicosanoate were submitted to DSC analysis in the range between room temperature and the isotropic liquid region. The information thus obtained, together with that already collected for shorter homologues, made it possible, inter alia, to outline the boundaries of the mesomorphic liquid region in the whole C5-C20 series. Comparison is also made with the previously investigated thermal behaviour of potassium n.alkanoates.
On the Interaction of Insoluble Alkyl Alcohol Monolayers with Aqueous Solutions of Ionic Surfactants
Authors: Eicke H.-F. , Sharma M. K. 
Published: February 2015

Abstract
The interaction between so-called alkyl alcohol (C5-C8) monolayers and aqueous solutions of ionic surfactants with different hydrophilic properties, i.e. calcium di-2-ethylhexyl sulfosuccinate and sodium dodecyl sulfate, has been studied with the help of a Langmuir-Adam film balance. A decrease or increase in surface pressure of the alkyl alcohol monolayers with the addition of surfactants is observed. The shift of the critical concentration (cmc) to increasing surfactant concentration occurs at intermediate surface pressures. This is interpreted as due to the formation of mixed alcohol-surfactant aggregates. The maximum of the cmc as a function of the pressure can be explained by a thermodynamic treatment assuming competition between a pressure dependent solubility of alcohol molecules and the formation of mixed alcohol surfactant complexes. The amount of alkyl alcohol required to react with the surfactant has been evaluated at different surface pressures, which shows values similar to those known from cosurfactant studies in the bulk phase. Critical micelle concentrations of the surfactants were verified by conductivity measurements.
Elastic Constants of Nematic Phenylpyrimidines Determined by Two Different Methods
Authors: Scharkowski A. , Schmiedel H. , Stannarius R. , Weißhuhn E. 
Published: February 2015

Abstract
A survey of various methods to measure the elastic constants Ki of nematic liquid crystals is given. To determine K1, K3 and the anisotropy of the diamagnetic susceptibility Δx of two members of the 5n-hexyl-2-[4n-alkyloxy-phenyl]-pyrimidines and a mixture of both, we used a combined electromagneto- optical method, consisting in independent measurements of the optical phase difference in electric and magnetic fields acting on the same cell. The temperature dependence of the K1- and K3-values for these phenylpyrimidines can be explained by common theories. The Δx data show the same temperature dependence as the values of the orientational order parameter S obtained by 1H-NMR.
Anomalous X-ray Scattering Study of the Quasi-crystalline Al65Cu20Fe15 Alloy
Authors: Matsubara E. , Waseda Y. 
Published: February 2015

Abstract
The environmental radial distribution functions (RDFs) around Cu and Fe as well as the ordinary RDF of an as-quenched Al65Cu20Fe15 alloy have been determined by anomalous x-ray scattering (AXS) and conventional x-ray diffraction techniques. The experimental information indicates that a strong directional dependence along the symmetrical axes exists for the Cu atoms but not for the Fe atoms. Almost identical RDFs were also obtained in both the as-quenched and fully-annealed states of the Al65Cu20Fe15 alloy. Thus, the small differences observed between diffraction profiles of the as-quenched and annealed samples of this alloy may be attributed to defects or strains introduced during the rapid quenching process.
Study of the Metastable Decay of Single Size Benzene Clusters by an Ion Stopping Technique
Authors: Sengteller S. , Selzle H. L. , Schlag E. W. 
Published: February 2015

Abstract
A method has been developed which allows to stop single sized cluster ions in a superionic jet. This cluster will stay isolated in space for a long time and photochemical processes can be studied without perturbation from the other clusters in the jet. This allows to uniquely identify the parent complex, and the metastable decay of this complex can be analyzed.
An Estimate of the R.M.S. Radius of the 1s-State Orbital of the Λ-Particle in Hypernuclei
Authors: Koutroulos C. G. 
Published: February 2015

Abstract
The r.m.s. radius of the 1 s-orbital of Λ-hypernuclei is calculated in the case of Woods-Saxon potentials by assuming that the Δsᵱ spacing (obtained by a relativistic treatment) can be approximated by ħωΛ.
Superposition-Model Analysis of NQR Data for NaAlCl4
Authors: Vassilikou-Dova A. B. , Lehmann G. 
Published: February 2015

Abstract
The quadrupole splitting patterns for 23Na and 27Al in NaAlCl4 can very satisfactorily be reproduced by the distortions of their first coordination spheres, as shown by application of the superposition model. The same exponent of 7 for the dependence on bond lengths was used as previously found for NMR data of 9Be, 23Na, 25Mg, 27Al and 29Si with oxygen as ligand. The intrinsic splitting parameters are in the same range, perhaps a little larger than for oxygen as ligand. Small deviations between observed and calculated splitting patterns just outside the limits of error of the crystal structure data may be due to influences of the lattice, especially in the case of 27Al, for which the distortions are fairly small