bluuebunny/crossref_metadata_2025_split huggingface dataset:
Unipolar Flow of Charge Carriers in a Dense Gas with and without Consideration of Diffusion
Authors: Dällenbach W. 
Published: February 2015

Abstract
The basic equations for the unipolar, stationary, one-dimensional flow of charge carriers in a dense gas, characterized by mobility and diffusion coefficient, can be integrated numerically. The discharge gap generally has a finite length; as far as in the end cross-section either density of particles and intensity of electric field tend towards infinity, or the density of particles becomes zero. Which of these two cases occurs depends on the current density of the discharge and on the intensity of the electric field in the initial cross-section. The notions mobility and diffusion coefficient will lose their applicability close to a pole like singularity as well as in a "dilution to zero", so that from a certain cross-section onwards the continuation of discharge is determined by modified equations.
It is shown that in case the diffusion component of the current density is neglected, the integrals of the basic equations change fundamentally. Neglecting the diffusion is inadmissible. This is finally a consequence of the relationship between mobility and diffusion coefficient, as expressed by the Einstein-relation.
Strukturbestimmung des N-Chlor-Sulfinylamins mit Hilfe der Elektronenbeugung an Gasen
Authors: Oberhammer Heinz 
Published: February 2015

Mit Hilfe der Elektronenbeugung wurde die Molekülstruktur des N-Chlor-Sulfinylamins in der Gasphase bestimmt. Folgende Werte für die geometrischen Parameter wurden erhalten:
N-Cl=1,696±0,003 Å, S-N=1,559±0,004 Å, S-O=1,445±0,004 Å,
∢ ClNS=116,3±0,4°, ∢ NSO=116,0±0,6°.
Das Chloratom steht in cis-Stellung und ist um einen Diederwinkel von ϱ = 35,5 + 3,6° aus der NSO-Ebene herausgedreht. Die Schwingungsamplituden wurden aus spektroskopischen Daten berechnet und werden mit den experimentell bestimmten Werten verglichen.
Zur Vereinfachung thermodynamischer Rechnungen Das "Stürzen" einer partiellen Ableitung
Authors: Job G. 
Published: February 2015

Abstract
Durch die Einführung einer neuen einfachen Operation zur identischen Umformung von Differentialausdrücken läßt sich der Arbeitsaufwand bei thermodynamischen Rechnungen stark verkürzen und das Ergebnis vieler Aufgaben häufig in einer Zeile unmittelbar aus den Definitionsgleichungen der vorkommenden Größen ohne Rückgriff auf früher abgeleitete Beziehungen und ohne Zwischenrechnung aufstellen. Sämtliche Reziprozitätsbeziehungen der klassischen Wärmelehre und der Thermodynamik irreversibler Prozesse können in einem einzigen Rechenschritt zusammengefaßt werden, so daß sich der Formalismus der thermodynamischen Potentiale weitgehend erübrigt.
Lassen sich Quantenzustände als Ensembles streufreier Zustände darstellen? I/Can quantum-states be considered as ensembles of dispersionfree states? I
Authors: Ochs W. 
Published: February 2015

Abstract
We consider the problem, whether quantum-states can be represented by Gibbsian ensembles of dispersionfree microstates having well defined values for all observables. Such a statistical representation is shown to be possible if and only if the concept and mathematical representation of observables is modified by abandoning the 1-1-correspondance between observables and operators. A particular representation of quantum-states by Gibbsian ensembles is constructed.
Resonant Approximation for Single-Particle Resonances in the Renormalized RPA-Problem
Authors: Weigel M. 
Published: February 2015

Abstract
An approximate version of the renormalized RPA-treatment for scattering of nucleons on a hole nucleus is given, in which the shape resonances are treated according to a method of BALASHOV et al. In order to make the results more transparent we take into account the additional influence of the non resonant part of the single-particle continuum with the help of a separable particle-hole force.
Die Verlagerung wandstabilisierter Lichtbögen durch Krümmung/The Displacement of Wallstabilized, Electric Arcs by Curvature
Authors: Nathrath Norbert 
Published: February 2015

Abstract
If an electric arc is forced to burn in a curved line by a toroidal container its position is displaced in direction to the center of curvature due to the inhomogeneous ohmic heating and of the cooling by conduction. The self magnetic-field pushes the arc outwards. Corresponding measurements in Argon at atmospheric pressure with currents from 0.5 to 20 A yield tbe excentric positions depending on current and curvature. The measured functions compare favourably with theory, but only if the deviation from LTE in the calculation of electric conductivity is taken into account.
Die Zerfallskinetik und kritische Konzentration des Peroxyds (H2O2 + UO4 ) in der Brennstofflösung eines wäßrig-homogenen Kernreaktors
Authors: Ehn E. , Tamberg T. 
Published: February 2015

Abstract
Die ohne UO4-Ausfällung erreichbare, maximale stationäre Leistungsdichte bei 40, 60 und 80° wurde für den Fall der im Berliner Kernreaktor (BER) benutzten Brennstofflösung ermittelt. Außerdem wurden die Geschwindigkeitskonstanten der Peroxydzersetzungsreaktion in Abhängigkeit von der Temperatur gemessen und die ohne UO4-Ausfällung noch einstellbare Peroxydkonzentration errechnet. Experimente zur Kinetik der UO4-Ausfällung und -Auflösung zeigten, daß beide Vorgänge stark gehemmt verlaufen und mit Über-bzw. Untersättigungserscheinungen verbunden sind.
On Dielectronic Recombination
Authors: Ansari S.M.R. , Elwert G. , Mücklich P. 
Published: February 2015

Abstract
The derivation of a general formula for the coefficient of dielectric recombination is reviewed, and approximate formulae known in the literature are discussed. With the aid of Burgess' simplified formula calculations of the coefficient of dielectronic recombination for the elements C, O , Ne, Mg, Si, S and Fe in the temperature range 108 - 4 x 106 °K are performed. The results are presented in figures and in tabular form. Taking into account dielectronic and radiative recombination, the ionization equilibrium for the various stages of these elements is determined and compared with recent results of other authors.
Ion-Slip Coefficients for Partially Ionized Argon and Helium
Authors: Wang H.S.C. 
Published: February 2015

Abstract
Ion-slip coefficients in Demetriades and Argyropoulos' generalized Ohm's law are studied quan-titatively in the first approximation for partially ionized Ar and He under various non-isothermal gas conditions. The macroscopic forces due to collisions between electrons, ion, and neutral atoms are accounted by averaging the momentum transfer cross sections over the Maxwellian velocity distributions of the colliding particles. To incorporate the appropriate interpolation and extrapola-tion techniques in the low energy limit, Frost and Phelps' cross sections for electron-atom collisions and Dalgarno's value for ion-atom resonant charge-transfer cross sections were used. The weighted average momentum transfer cross sections thus obtained, which are also important in other diffusion and transport processes, are tabulated at various particle kinetic temperatures for both gases. A family of curves representing values of ion-slip coefficients calculated from these data is plotted. With the generalized Ohm's law written in its inverted form, the influence of ion-slip on the "Hall conductivity" in Kruger et al's formulation is discussed.
A New Type of Apparatus for the Determination of the Thermal Diffusion Factor
Authors: Õost W .A. 
Published: February 2015

Abstract
In this article an apparatus is presented which gives a precisely known multiplication of the elementary effect in thermal diffusion experiments, avoiding the drawbacks of the swing-separator (Trennschaukel). This is achieved by using a different method of concentration nivellation than customary with the swing-separator, viz. thermosyphon action.
A Quasi-Universal Internuclear Potential Energy Function for the Diatomic Halides
Authors: Yeranos Walter 
Published: February 2015

Abstract
Taking into account the universal correlation of the force constants of halide bonds with their respective dissociation energies (excluding the fluorides), an internuclear potential energy function of the type V(r) = De (1-e-α(r-re))2 + β (1-δF,X) (r - re)2e-γ(r-re) has been proposed for the diatomic halides. α und β, in the latter are constants for a specific series, γ is determined from the rotational-vibrational constant αe, and the function reduces to the ordinary Morse potential function in the case of the fluorides. It, moreover, performs as well as the Hulburt-Hirschfelder 5-parameter function, and, unlike the latter, utilizes the anharmoni-city constant ωeXe as an internal check.
Chemically Induced Dynamic Nuclear Polarization
Authors: Fischer Hanns 
Published: February 2015

Abstract
NMR emission and enhanced absorption of products of radical reactions (CIDNP) is explained by nuclear spin dependent adiabatic transitions between singlet and triplet states of transient radical pairs. In magnetic fields larger than about 1 kG only S - To-transitions contribute to nuclear polarization. From a kinetic formulation of the pair mechanism equations for quantitative calculations of CIDNP patterns are derived.
Zum Mechanismus der Wärmeleitfähigkeit in Ni-und Ni—Cu-Legierungen
Authors: Tursky W. , Koch K. 
Published: February 2015

Abstract
Die Messungen der Änderung der Wärmeleitfähigkeit von Ni-und Ni —Cu-Legierungen im Magnetfeld bei Temperatu-ren unterhalb Raumtemperatur ergeben bis zur magnetischen Sättigung ein völlig paralleles Verhalten von X und o. Bei Stickstofftemperaturen zeigen sowohl die AX/X-als audi die zlö/ö-Kurven oberhalb der Sättigung eine Abnahme mit wach-sendem Magnetfeld, auf die bei weiterem Anstieg von H der normale dM/dH-Effekt folgt.
Hall-und Nernst-Effekt in Ni-und Ni—Cu-Legierungen
Authors: Weiser O. , Koch K.M. 
Published: February 2015

Abstract
DANNHÄUSER und KOCH 1 haben den Nernst-Effekt von Ni —Cu-Legierungen bei Raumtemperatur gemessen und ge-zeigt, daß er bis zu rund 30% Kupfer zunimmt, bei höheren Cu-Konzentrationen aber wieder abnimmt. Für den Hall-Effekt konnte NENTWICH 2 den gleichen Verlauf mit der Cu-Konzentration nachweisen, nur war hier der Abfall schon ober-halb 20% zu beobachten. Wir haben Hall-und Nernst-Effekt bei Temperaturen bis rund 350 °C gemessen und festgestellt, daß beide Effekte sowohl im reinen Nickel als audi bei den Ni —Cu-Legierungen anfangs mit der Temperatur zunehmen, bei einer reduzierten Temperatur T/Tc = 0,8 bis 0,9 (7c = Curie-Punkt) ein Maximum erreichen und dann rasch abneh-men.
Viscosity in an Electric Field of Mixtures of Polar Gases with Argon and Helium
Authors: Levi A.C. , Scoles G. , Tommasini F. 
Published: February 2015

Abstract
The influence of an electric field on the viscosity of mixtures of polar gases with argon and helium has been measured using a capillary bridge. The relative change of the viscosity coefficient η3 has been obtained in this way. A theory of the effect is sketched along similar lines to those followed by Tip for the magnetic case. The half value of the field is shown experimentally to be linear in the concentration. Moreover, a comparison of the experimental data with the theory yields cross section ratios of noble-polar collisions versus polar-polar collisions, both for the reorientation and for rotational energy transfer. The reorientation collision frequencies are compared to those obtained from non-resonant microwave absorption.
Der Einfluß der Primärmasse auf die Struktur großer Luftschauer
Authors: Thielheim K. O. 
Published: February 2015

Abstract
Results of Monte Carlo Simulations of Extensive Air Shower Development are discussed with respect to the influence of primary mass on shower characteristics (energy spectrum and lateral distribution of hadrons, frequency of nuclear active "multicores", mean total energy of hadrons, fluctuation of total hadron energy, mean total number of myons, fluctuation of total myon number, mean central electron density, frequency of electromagnetic "multicores"). Critical comments are presented concerning some empirical data.
Observations on Electrotransport in Thin Aluminum Films Using Resistance Measurements *
Authors: Hummel R. E. , Breitling H. M. 
Published: February 2015

Abstract
Resistance measurements of five different portions of uncoated and partially SiO-overcoated aluminum stripes are reported. In specimens of both types the resistance increases at the cathode when the stripe is subjected to high current densities. In partially coated specimens the resistance decreases at the anode whereas it remains constant in the uncoated sample. The difference in behavior at the anode between coated and uncoated specimens is interpreted as being due to dif­ferences of ion accumulation: In the uncoated films hillocks are formed whereas in the specimen with partial overcoat the ions accumulate more to support this interpretation
Correlation Effects and Activation Energies for Diffusion in Alloys
Authors: Manning John R. 
Published: February 2015

Abstract
The problems involved in calculating correlation factors for diffusion in dilute alloys can be contrasted to those arising in concentrated solid solutions. As one moves from the pure element to the dilute alloy to the concentrated alloy, the calculation becomes progressively more difficult. Because of the complex atom configurations which can occur in concentrated alloys, it usually is not possible to calculate correlation factors in these alloys exactly. Several important simplifications are available in non-dilute random alloys. A large reduction in complexity can be secured by using a random alloy model where each atom is treated as diffusing in a uniform matrix, with the matrix properties being determined by the composition and jump frequencies in the alloy. Resulting equations in this random alloy model can be expressed directly in terms of the experimentally measurable tracer diffusion coefficients with no unknown vacancy jump frequencies appearing. Also these equations have the advantage of being in simple analytic form and not requiring numerical methods to evaluate the correlation factors. These two features make possible the direct expression of the temperature dependence of the correlation factor in terms of the experimental activation energies.
Equations are found for ΔH/ΔQ in random binary cubic alloys, where AH is the difference between the activation enthalpies for diffusion of the two species and ΔQ is the difference between the experimentally measured activation energies of the two species. This ratio is never less than unity and can be much larger than unity. Values are plotted for diamond, body-centered cubic and face-centered cubic structures. From the magnitude and composition dependence of ΔH/ΔQ, it is concluded that the temperature dependence of the correlation factor cannot by itself explain the difference between the activation energies measured from tracer diffusion and from internal friction in the non-dilute range
The Influence of Deposition Conditions on the Photoconductive Properties of Chemically Deposited Lead Sulphide
Authors: Büger P. A. , Malan O. G. , Kunze O. A. , Fink W. 
Published: February 2015

Abstract
The influence of the deposition time and the ratio of hydroxide to lead ion concentration in the precipitation solution on the photoconductive properties of chemically deposited PbS layers was investigated.
From measurements of time constant, noise and resistance, it could be shown how the deposition conditions control the number of trapping centres and carrier density. The trapping centres may be connected with excess lead atoms deposited in the PbS lattice under the conditions of pre­paration
Supraleitung und Magnetismus in Mischphasen des Typs Mex Ce1-x Ru2 und Ce(Ru1-x Mex)2
Authors: Wilhelm M. , Hillenbrand B. 
Published: February 2015

Abstract
Es wird die Präparation von Mischphasen der Zusammensetzung MexCe1-x Ru2 (Me = Sc, Y, La, Pr, Nd, Gd, Tb, Dy, Ho, Er, Lu) und Ce (Ru1-x Mex)2 (Me = Cr, Fe, Rh, Pd, Os, Ir, Pt) be­schrieben. Für die La-, Pr-, Nd- und Fe-haltigen Legierungen wurde eine lückenlose Reihe kubi­ scher Mischkristalle gefunden. In Systemen mit Mischungslücken wurden die Löslichkeitsgrenzen ermittelt. Kubische Gitterkonstanten, Übergangstemperaturen zur Supraleitung Tc und Spinord-nungstemperaturen Θc werden mitgeteilt
Orthogonalitätsrelationen der mehrzeitigen erzeugenden Funktionale des Harmonischen Oszillators
Authors: Weber R 
Published: February 2015

Abstract
We treat the one-dimensional harmonic oscillator completely in the field theoretic calculus of many time generating functionals. Without the results of common quantum mechanics we compute eigen values and functionals of the energy preparing all information of the harmonic oscillator. As an example of functional integration and for applications in scattering theory we prove orthonormality relations of these functionals.
Die Mikrowellen-Rotationsspektren des AgCl, AgBr und AgJ
Authors: Hoeft J. , Lovas F. J. , Tiemann E. , Törring T. 
Published: February 2015

The observation of the low lying rotational transitions J = 0 →1 of AgCl and J = 2→3 of AgBr resulted in improved quadrupole coupling constants: 107, 109Ag35Cl: e qν Q (35Cl) = -36,50 (10) MHz (ν=0,1); 107.109Ag79Br; e q0 Q(79Br) =297,10(15) MHz, e q1 Q (79Br) =297,65 (15) MHz. In con­trast to former measurements of KRISHER and NORRIS we obtained the following constants of 107Ag79Br: Y01 = 1943,6420 (50) MHz, Y11 = -7,0745(70) MHz, re = 2,393100(29) Å.
The unknown rotational spectrum of AgJ was found. Measurements of the transition J = 3 →4 in four vibrational states resulted in the determination of the following molecular constants:
Y01 = 1345,1105(25) MHz, Y11= -4,2389(30) MHz, Y21 = 1,70(80) kHz, Y0,=-0,2540(2) kHz; re = 2,544611 (31) Å; e q0 Q(127J) =-1062,17(40) MHz, e q1 Q(127J) = -1064,81 (40) MHz.
On the Calculation of Nonlinear Spinor Field Functionals
Authors: Stumpf H 
Published: February 2015

Abstract
Dynamics of quantum field theory can be formulated by functional equations. To develop a complete functional quantum theory one has to describe the physical information by functional operations only. Such operations have been defined in preceding papers. To apply these operations to physical problems, the corresponding functionals have to be known. Therefore in this paper calculational procedures for functionals are discussed. As high energy phenomena are of interest, the calculational procedures are given for spinor field functionals. Especially a method for the calculation of stationary and Fermion-Fermion scattering functionals is proposed.
Eigenfrequencies and Eigenvectors of Polaritons with Application to LiNbO3 I. Long Optical Phonons
Authors: Börstel G. , Merten L. 
Published: February 2015

Abstract
The properties of polaritons in uniaxial crystals with an arbitrary number of atoms in the unit cell are discussed in the harmonic approximation. For LiNbO3 , which seems to become a very important substance for applications in tunable Raman lasers, the complete set of eigenfrequencies and eigenvectors (normal coordinates, electric field, electric polarisation) is calculated numerically.
In the limiting case k→∞ (long optical phonons), which is treated in detail in this first paper, an example for each possible type of extraordinary phonon branches is discussed, namely a (T→L) -a (L→T)-, a (T→T)-and a (L→L) -branch of each type. The results are comparable with ex­perimental data only for the frequencies of the 45°-phonons, measured by Barker and Loudon. The agreement is very satisfactory.
Das Verhalten toroidaler elektrischer Lichtbögen / The Behaviour of Toroidal Electric Arcs
Authors: Wynands A. , Druxes H. , Schmitz G. 
Published: February 2015

Abstract
A wall-stabilized electric arc in an uniform bent tube is investigated. By the asymmetry of Ohmic heating and heat conductivity through the wall a displacement of the maximum of temperature is caused into the direction of the center of curvature, contrary to cylindrically symmetric geometries. By this an asymmetry of the thermal, electric and magnetic quantities is generated and produces a mass flux through the cross-section of the tube. A double whirl is formed by the self-magnetic Lorentz-forces.
This convectiv heat flow displaces the maximum of temperature bade into the direction of the outer wall. Both influences are investigated and the final position of the maximum of temperature is discussed in dependence on the arc parameters.
For numerical calculations the equations of continuity, motion, energy and the Maxwell's equa­tions of electromagnetic field are solved simultaneously. Results for a nitrogen plasma at nearly atmospheric pressure are presented.
Thermodynamische Analyse der binären Systeme des Germaniums mit Kupfer, Silber und Gold
Authors: Predel B. , Stein D. W. 
Published: February 2015

Abstract
For the purpose of carrying out a thermodynamic analysis of the binary systems of germanium with copper, silver and gold, the enthalpies of mixing of liquid Cu-Ge and Au-Ge alloys were determined at 1150 °C. Further the enthalpies of mixing of Ag-Ge solid solutions and the enthalpies of formation of the ζ and ε1 phases of the Cu-Ge system were obtained from the enthalpies of solution in liquid tin. It was possible to determine the enthalpy of transformation of germanium from its stable modification into a hypothetical, face-centered cubic structure (ΔHT(Ge) = 13.0 kcal /g-atom) which has a decisive influence on the stability of the solid phases in the systems under consideration. Liquid Cu-Ge alloys show energetic pecularities similar to those existing in the solid state and leading to the formation of electron compounds. A distinct influence of the valency difference of the components can also be demonstrated. In the gold-germanium system, however, the influence of the electronegativity difference of the components is dominant.
ESR Triplet Exciton Spectrum of Acridine Orange
Authors: Schmidt Hartmut 
Published: February 2015

Abstract
The triplet state of acridine orange dissolved in methanol/water matrix was investigated by ESR. In absence of oxygen a strong temperature dependence of the spectra was observed. At low temper­ature (100 °K) the zero-field splitting parameters calculated from the triplet spectrum are: X/hc = 0.0050 cm-1, Y/hc= 0.0342 cm-1, Z/hc=0.0387 cm-1 , at higher temperature (140 °K) : X*(hc=0.0056 cm-1, Y*/hc=0.0206 cm-1, Z*/hc = 0.0262 cm-1 . It was assumed that the low temperature spectrum is caused by isolated molecules in the triplet state while the high temperature spectrum must be attributed to the triplet exciton state of the acridine orange dimer. From the theory of the ESR triplet exciton spectra it can be shown that in the dimer state of acridine orange the molecular planes form an angle of 50° or 130°. However, it cannot be excluded that the dimer configuration differs in the ground or excited singlet state from the triplet state.
Notizen:Kernrückstoß in festen Stoffen und Knock-out-Effekt
Authors: Zimen K. E. , Mertens P. 
Published: February 2015

Abstract
H errn P rof. Dr. N ikolau s R ieh l zum 70. G ebu rtstag gew idm et In einer großen Zahl von Arbeiten 1 wurde die von 0 . Hahn eingeführte sogen. Emaniermethode benutzt, um Aussagen über Transportmechanismen und Fehlord­ nungen in festen Stoffen zu gewinnen. Nach der Theo­ rie dieser Methode2 setzt sich das Emaniervermögen, d. h. die Austrittswahrscheinlichkeit der Edelgasatome (e), zusammen aus einem Rückstoßanteil und einem Diffusionsanteil: £ = £ r + £ d . Der hier interessierende Rückstoßanteil ergibt sich nach 2, z. B. für ein kugel­ förmiges Korn, aus