bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pressure Broadening of Multiply Ionized Carbon Lines
Authors: Bogen P. 
Published: February 2015

Abstract
In a helium plasma with carbon impurity, the pressure broadened profiles of seven C III and two C IV lines have been measured. The plasma which was produced by magnetic compression had typically an electron density of 4 · 1017 cm-3, a temperature of 60 000°K, and a life time of about 0.1 μs. Electron densities have been deduced from the width of the He II λ= 3203 Å line. If ΔEii′ ≪ kT {ΔEii′ = energy difference between perturbed level i and perturbing level i′) the classical straight line non-adiabatic theory gives values being in good agreement (error < ± 25%) with measured widths for six lines. For two lines the deviations are larger. For the C IV resonance line (λ = 1550 Å) with ΔEii′ >k T, the profile can be explained by hyperbolic path, adiabatic collision theory. The semiempirical Gaunt-factor approximation gives a rough estimate of the width, but normally the values obtained are too low.
Schubnikow—de Haas-Effekt und Bandstruktur-Untersuchungen an Wismut—Antimon-Legierungen / Shubnikov-de Haas-Effect and Band Structure Investigations in Bismuth — Antimony Alloys
Authors: Schneider Detlef 
Published: February 2015

Abstract
Magnetoresistance, Hall effect, and susceptibility have been investigated in Te-doped Bi95Sb3 single crystals. The experimental results establish the occurrence of both longitudinal and transversal SdH-oscillations over a wide temperature range up to T = 77 °K. Dingle-temperatures, cyclotron masses, spin splitting, and the effective mass tensor of the electrons at the Fermi level and the band edge were calculated from the temperature and angular dependence of the SdH-oscillations. The results are discussed in respect of various models of the electron band structure. The behaviour of the small Fermi surface cross sections is in agreement with the ENP-model, however in the long direction of the quasi ellipsoids a slight variation of the effective mass must be assumed.
Berücksichtigung der Gitterperiodizität bei der Elektron-Plasmon-Streuung. II / Consideration of Lattice Periodicity at the Electron Plasmon Scattering. II.
Authors: Münchmeyer W 
Published: February 2015

Abstract
It is shown that the existence of the additional inelastic scattering processes described in part 1 is caused by lattice periodicity and depends upon the form of the Fermi surface. An estimate of that part of the anomalous absorption resulting from this scattering process is given.
Elektronenbeugung an Vizinalflächen und an Kugelflächen von Einkristallen / Electron Diffraction of Vicinals and of Spherically Shaped Crystal Surfaces
Authors: Melle H , Menzel E 
Published: February 2015

Abstract
The reciprocal lattice of a periodic terrace-ledge surface is calculated by Fourier transformation. This formalism is applied to spherical crystals. In that case the reciprocal lattice consists of bundles of finite streaks; their vertices are situated on the reciprocal lattice points of the bulk crystal. That confirms a model formerly used to discuss LEED experiments with spherical crystals. The calculation is generalized to describe terraces composed of several monolayers.
Determination of a Static Hyperfine Interaction Following Recoil into Vacuum
Authors: Dar Y. , Engelstein P. , Gerber J. , Levy R. , Vivien J.P. 
Published: February 2015

Abstract
By means of using a plunger time-differential technique, spin precessions from a static free hyperfine interaction have been observed for low-energy 152Sm nuclei recoiling into vacuum.
Bewegungen der CH3 -Gruppen in Methyl-Naphthalin-Kristallen
Authors: Schütz J.U. , Noack F. 
Published: February 2015

Abstract
The temperature and frequency dependencies of the proton spin relaxation in methyl naph-thalenes discussed in a preceding paper can be described quantitatively by assuming a rotatory jump model of the methyl groups in connection with a Cole-Davidson distribution of jumping times. The observed activation barriers are derived in good approximation from a Buckingham potential.
Massenspektrometrie am negativen Glimmlicht einer zylindrischen Hohlkathode / Mass Spectrometric Studies of the Negative Glow of a Cylindrical Hollow Cathode Discharge
Authors: Pähl M. , Lindinger W. , Howorka F. 
Published: February 2015

Abstract
Positive ions were extracted from the negative glow (NG) of a cylindrical hollow cathode discharge (h.c.d.) through a plane sampling probe (diameter 1 mm, orifice dia. 50 [xm, Molyb-denum) and analyzed in a 60° mass spectrometer. The discharge was operated in pure Argon with an admixture of about 0.1% of H20. The principal ions were Ar+, Ar++,r2
+, ArH+ , H20+ and H3O+ . The individual ion currents were measured as functions of the probe potential U\>, at dif-ferent discharge currents (2 - 7 mA) and of the gas pressure (0,05 - 0,5 torr).
The reaction scheme for the production and conversion of these ions in the NG could be established. In general, the ions were extracted from the axis of the h.c.d. When the sampling probe was mounted excentrically (3 mm out of the axis), the ratio of secondary to primary ions was higher in the axis.
At probe potentials above +15 v referred to anode no ions from the NG reached the probe, but electrons were accelerated so that ionization of the neutral gas could arise in and behind the orifice. The Ar++ current as a function of Ub together with other results suggested the presence of very fast electrons (energy > 100 v) in the sampling orifice. They could be identified as electrons from the cathode fall region which were scattered into the orifice.
Studies of the ion currents from Ar-H2 mixture proved the sampling probe suitable as an electron impact ion source.
Ein Röntgen-Diffraktometer mit vertikaler Achse zur Strukturuntersuchung von flüssigem Natrium
Authors: Schierbrock R. B. , Langner G , Fritsch G , Lüscher E 
Published: February 2015

Abstract
Es wird eine automatische Röntgen-Streuapparatur zur Untersuchung von flüssigem Natrium be-schrieben. Zum Unterschied früherer Messungen an freien Natriumoberflächen wurde eine senkrecht-stehende Meßkammer mit Beryllium als Röntgen-Fenstermaterial verwendet.
Messungen am flüssigen Natrium wurden bei einer Temperatur von 114,3 °C durchgeführt und aus den Streudaten die statische Strukturfunktion und die atomare Dichteverteilung ermittelt. Die Ergebnisse werden mit den bisher bekannten Messungen am flüssigen Natrium verglichen
Elektrisches dipolmoment von InCl / Electric dipole moment of incl
Authors: Tiemann E. , Hoeft J. , Törring T. 
Published: February 2015

Abstract
Stark-effect measurements on the rotational transition J = 1 → 2 of InCl are described. The vapour pressure in the absorption cell was chosen so that the quadrupole hyperfine structure due to the Cl-nucleus could not be resolved. Thus we neglect this coupling in the calculation of the Stark-effect. The derived electric dipole moment in the ground vibrational state is:

115In35Cl : | μ0= (3.79 ± 0.10) D.
The electric dipole moment of 205Tl19F : | μ0 | = 4.2282 (8) D was used for the calibration of the electric field
Isotherme galvanomagnetische Transport- koeffizienten bei Streuung quasifreier Ladungsträger an Dipolen / Isothermic galvanomagnetic transport coefficients of quasi-free carriers scattered, at dipole centres
Authors: Rachmann J 
Published: February 2015

Abstract
It has been observed that in several semiconductors an in-crease in total impurity concentration leads to an increase in the low-temperature mobility due to pairing effects. The trans port coefficients rʜ, rQ' and rQ necessary for the analysis of the Hall effect and the magnetoresistance, in the event of di-pole scattering, are derived for the cases k a ≫ 3 and k a ≪ 3 (k = wave number of the quasi-free charge carrier, a = dipole length). For k a ≫ 3 the coefficients are dependent on tempe-rature, effective mass, and dipole length, whereas for k a ≪ 3 they are constant
Das Mikrowellenspektrum Der Fluor Wasserstoffassoziate Im X- Und K-Band / The Microwave Spectrum Of The Hydrofluoric Associate In The X And K Band
Authors: Reichert U. V. , Hartmann H. 
Published: February 2015

Abstract
Es wird das Mikrowellenspektrum von Fluorwasserstoffassoziaten im X-und K-Band bei -70 °C und 0,01 Torr gemessen und analysiert. Dazu wird ein erstelltes Frequenzprogramm für den asymmetrischen Kreisel verwendet, sowie ein Extrapolationsprogramm, das eine in der Literatur angegebene druck-und temperaturabhängige Verteilung der Fluorwasserstoffassoziate auf für Mikrowellenspektroskopie geeignete Drücke und Temperaturen umzurechnen erlaubt. Es zeigt sich, daß planare hexamere und heptamere Fluorwasserstoffassoziate vorliegen mit F-F-F-Winkeln von etwa 104° und H-F-Bindungslängen von 0,9997 Å bzw. 0,9640 Å. Die Längen der Wasserstoff brücken sind 1,4998 Å bzw. 1,6105 Å. Ein Vergleich der Bindungslängen zeigt, daß bei Anlagerung von H-F an (HF)6 eine Kontraktion der Fluorwasserstoffbindung um 3,5% und eine Dilatation der Wasserstoffbrückenbindung um 1% stattfindet. Dieses Ergebnis steht im Einklang mit der oben erwähnten Assoziatverteilung, die eine Minderung der Kettenstabilität beim Übergang von hexamerer zu heptamerer Kette erwarten läßt.
Calculations of Eigenvalues in Functional Nonlinear Spinor Theory
Authors: Dammeier K 
Published: February 2015

Abstract
A differential equation of third order for spinor potentials is proposed, that modifies the dynamics of the nonlinear spinor theory. We derive a symmetrical eigenvalue equation using functional integration techniques. This equation and a momentum symmetrized equation - a simplified form of the mass eigenvalue equation proposed by Stumpf - are applied to calculate mass eigenvalues. By a special combination of both methods it is possible to weaken the regulari-zation dipole in Heisenberg's theory and thereby produce better boson masses. Finally, the modified theory allows a self-consistent calculation of the fermion propagator
On the Functional Definition and Calculation of Global Observables in Nonlinear Spinor Field Quantum Theory
Authors: Stumpf H 
Published: February 2015

Abstract
Nonlinear spinor theory contains unobservable field operators which cannot be identified with free field operators. Therefore for the comparson with experiment a theory of observables for nonlinear spinor fields is required. This theory is developed for global observables by means of a map into functional space, and leads to a functional quantum theory of nonlinear spinor fields
Eigenfrequencies and Eigenvectors of Polaritons with Application to LiNbO3. II. Polaritons of Small Wave Vectors k (k ≦ 104 cm-1)
Authors: Merten L , Borstel G 
Published: February 2015

Abstract
In this second paper the region of strong dispersion of extraordinary polaritons (k ≈ 103 - 104 cm-1) and the limiting case k ￫ 0 is treated. The dependence on k of the eigenfrequencies ω, of the quasi-normal coordinates Qi, of the electric field E and of the electric polarization P is discussed in detail for four branches of LiNbO3 as examples. The behaviour of eigenfrequencies and eigen-vectors in the vicinity of the crossing points of the vibrational branches is of special interest. It is shown in the appendix that the coupled harmonic oscillator formalism due to Onstott and Lucovsky is equivalent to our theory in the special case k ￫ ∞, ε⊥
∞ = ε||
∞
Zur paramagnetischen Elektronenresonanz metallorganischer Sandwich-Verbindungen, Teil II / The Magnetic Resonance Properties of Some Sandwich Compounds, part II
Authors: Krieger Robert , Voitländer Jürgen 
Published: February 2015

Abstract
In part II the magnetic resonance properties of the lowest lying excited triplet state of ferrocene has been investigated theoretically. As in the case of the ground state of chromocene (part I) we studied the splitting of the orbitally degenerate triplet state by the combined action of spin-orbit coupling and low-symmetry perturbation. The results explain the fact that no ESR spectrum has been observed in the lowest lying triplet state of ferrocene until now. There is also given an estimation of the lifetime of this state. The g-values and parameters of hyperfinestructure of the orbitally degenerate doublet ground state of cobaltocene are calculated and compared with the experimental results. The wave functions used for the calculations were obtained by a self-consistent-charge extended Hückel method.
Electronic Structure of Octacyanides of Molybdenum IV and V According to the SCCC MO Method. The D2d Case
Authors: Gołębiewski A. , Nalewajski R. 
Published: February 2015

Abstract
The electronic structure of dodecahedral octacyanides of molybdenum IV and V is described in terms of SCCC molecular orbitals. Five MO's resemble d orbitals of the central atom. The splitting of appropriate levels is almost exactly the same as that following from the crystal field theory for G4/G2 ~ 0.7. According to the theory stable Mo(CN)8
4- is dodecahedral and stable MO(CN)8
3- is antiprismatic. In the dodecahedron the A-type ligands are bonded more strongly than the B-type ligands.
Das Emissionsspektrum der stillen elektrischen Entladung in Ammoniak-und Hydrazin-Dampf / The Emission Spectrum of the Silent Electric Discharge in the Vapours of Ammonia and Hydrazine
Authors: Weisbeck R. , Rühle D. 
Published: February 2015

Abstract
Below 5000 Å the silent electric discharge in ammonia essentially reveals the same emission spectrum as the glow discharge. Between 5000 and 8000 Å in discharges in NH3 as well as in N2H4 there appear besides the Schuster band and the Ha line especially 3 new diffuse peaks with maxima of intensity at about 5253, 6380 and 7560 Å. These emissions are caused presumably by a more than 2atomic molecule (NH3, N2H2, N2H3 or N2H4). The behaviour of the intensities of the Hα line and the Schuster band favours the hypothesis H + N2H3 → N2H4* → N2H4 + h v for the formation of the Schuster band already put forward some time ago.
Konzentrationsabhängigkeit der Thermodiffusion in D2 -H2 , HD-H2 und D2 —HD bei 85 °C / Dependence on Composition of Thermal Diffusion in D2 -H2 , HD-H2 and D2 -HD at 85 °C
Authors: Müller K.P. , Klemm A 
Published: February 2015

Measurements of the thermal diffusion factor (α) result in the relations
D2 - H2 : α= (0.182-0.057 γ) ±0.003 ,
HD - H2: α= (0.116-0.036 γ) ±0.003 ,
D2-HD: α= (0.064-0.017 γ) ±0.002
with γ the molar fraction of the heavy molecule. Earlier measurements on tritium systems are corrected and discussed in view of these results.
The d2 and d8 Noncubic Ligand Field Spectrum. I. The Complete Theory of Quadrate, Trigonal, and Cylindrical Ligand Fields
Authors: Perumareddi Jayarama 
Published: February 2015

Abstract
The complete theory of Liehr and Ballhausen for d2 and d8 electronic configurations immersed in cubic fields has been extended to include noncubic ligand fields of quadrate, trigonal, and cylindrical symmetry. The complete set of symmetry adapted eigenvectors for the three symmetries have been derived in various coupling schemes in which the spin-orbit interaction, electron cor-relation, and ligand field in turn are varied from minor to dominant perturbations. The cor-responding energy matrices as a function of the parameters of the ligand field, electron correlation, and spin-orbit constant have been constructed in all the representations. Unitary transformations connecting different formalisms were obtained. The energy matrices have been solved for representative sets of parametric values and energy diagrams have been plotted in all the symmetries as well as in the square planar limit of the quadrate crystalline field. The secular determinants, the eigenfunctions, the energy diagrams, and the unitary transformations presented here are extremely useful in the study of the various aspects of spectroscopic, magnetic, and other properties of appropriate systems. The theory is applicable to quadrately distorted or substituted, trigonally distorted or substituted, octahedral and tetrahedral complexes and to compounds of cylindrical symmetry of d2 and d8 electronic configurations.
Determination of Gradient-Elastic Constants in Cubic Solids
Authors: Hackeloer H. J. , Kanert O. 
Published: February 2015

Abstract
The effect of static elastic stress on the NMR signal in LiCl35 , Rb85Cl35 , and Rb87Br is used to determine the gradient elastic constants relating the electric field gradient at the given nucleus to the elastic deformation. In contrast to previous experiments the quadrupole distortion produced by internal lattice distortion (point defects, dislocations etc.) is considered. Neglecting these distortions leads to an error in the determination of the gradient elastic constants by an order of magnitude.
Infrarotmessungen zur Ring-Ketten-Struktur des amorphen Selens
Authors: Gobrecht H. , Willers G. , Wobig D. , Zirre J. 
Published: February 2015

Abstract
The infra-red spectrum of red amorphous selenium has been studied in the region of 1 μm to 25 μm. The formation of Se8-ring molecules as well as polymeric chains Sen has been observed by investigating non-fundamental vibrations. Additional absorption bands at 7.85 μm (1274 cm-1), 8.95/9.35 μm (1117/1070 cm-1) and 12.35 μm (810 cm-1) are reported. They are assigned to multiphonon processes of the type E fundamental of Sen at 74.1 μm (135 cm-1).
Untersuchungen an CdS-Dünnschicht-Solarzellen / Investigations on CdS Thin Film Solar Cells
Authors: Küfe L. , Schneider G. 
Published: February 2015

Abstract
CdS thin film solar cells with a p-Cu2S - n-CdS-heterojunction were made by vacuum evaporation of CdS films on Mo substrates and dipping of these films into Cu+-ion solution. The influence of various annealing times and repeated dipping into Cu+-ion solution were investigated and discussed. Etching the CdS films with various etchants gave different results. In this way the solar cells yielded efficiencies up to 5.2%. The influence of interfaces of Ag and Zn between the Mo-substrat and the CdS film was studied.
Microwave Spectrum and Dipole Moment of Dimethylnitrosamine
Authors: Scappini F. , Guarnieri A. , Dreizler H. , Rademacher P. 
Published: February 2015

Abstract
The microwave spectrum of the (CH3)2NNO and (CH3)2
15N15NO species have been studied and the rotational constants evaluated. By comparison of the inertia defects of the two species it can be stated that the nuclear frame of the molecule is planar, which is in agreement with the reported electron diffraction results. The dipole moment of the (CH3)2
15 N15NO species has been determined. Further studies on the internal rotation of the two methyl tops are in progress together with the analysis of the spectra of other isotopically substitued species.
Richtwirkung verschiedener Ionen auf anisotrope Kolloide
Authors: Thiele Heinrich , Lück Hans 
Published: February 2015

Anisodiametrische Teilchen von Solen können durch oberflächenaktive Stoffe, durch Phasengrenzen oder durch Elektrolyte ausgerichtet werden.
Gemessene und berechnete Diffusionspotentiale der ionogenen Stoffe ergeben eine Beziehung zwischen der Aufladung des Gelrandes, bedingt durch die verschiedene Diffusionsgeschwindigkeit der Ionen, und dem Vorzeichen der Doppelbrechung.
Durch die positive oder negative Aufladung des Gelrandes werden die Teilchen im Sol durch Anziehung oder Abstoßung radial oder tangential ausgerichtet - und in dieser Lage fortschreitend fixiert.
Die cytologischen Grundlagen des Crossing-over bei Oenothera
Authors: Renner Otto 
Published: February 2015

Eine bisher dem Aliel p (ungetupfter Stengel) zugeschriebene pollenletale Wirkung des albicans-Komplexes der Oe. biennis wird nach einer Analyse der Oe. (biennis × Hookeri) albihookeri auf das Gen an (androletal oder androkton) zurückgeführt, das einwärts von s (sulfurea, schwefelgelbe Blüte) und auswärts von p (ohne rotes Pigment) liegt. Doppeltes Crossing-over auf der Strecke p-s bzw. P-S ist nicht beobachtet. Die pollenaktive Kombination pS-hHookeri, jetzt als p An S zu verstehen, kommt nur in zwei Crossing-over-Schnitten zustande, die sich über zwei Generationen verteilen. Das Segment pS von flavens der Oe. suaveolens, das an Stelle von PS in velans von Oe. Lamarckiana eingegliedert werden kann, enthält keinen Pollenletalfaktor; so ist p-velans in pollenaktiver Form durch eine einzige Überkreuzung zu gewinnen.
Die Vermutung, daß das genetische Crossing-over bei Oenothera mit den interstitiellen, bis zur Anaphase erhalten bleibenden Chiasmen (den „Querarmen“) zusammenhängt, wird durch folgende Erfahrungen gestützt: 1. Formen, in denen das Crossingover häufig ist, haben viele Dauerchiasmen, und Formen mit seltenem Austausch sind arm an Chiasmen. 2. Oe. (Lamarckiana vetaurea × biennis) velutirubata, mit den Allelen vet - Vet (altgold gegen hochgelb) und r - R (weiß- gegen rotnervig) im einzigen freien Chromosomenpaar, zeigt in diesem Paar bis zu 5% Querarme und brachte 2% vet R-Crossovers. 3. So wie doppeltes Crossing-over nie beobachtet wurde, so sind Chiasmen immer einfach.
Ob die normalen Endbindungen der Diakinesechromosomen bei Oenothera immer terminalisierte Chiasmen darstellen, wird noch genauer zu prüfen sein.
Quantitative Analyse der Krebsentstehung
Authors: Druckrey Hermann , Küpfmüller Karl 
Published: February 2015

In quantitativen Versuchen an 700 Ratten mit dem krebserregenden Farbstoff „Buttergelb" ergaben sich folgende Beziehungen zwischen der Dosis und der Wirkung:
1. Die Latenzzeit bis zum Auftreten der ersten Lebergeschwülste ist eine einfache Funktion der täglich gegebenen Dosis.
2. Zur Geschwulsterzeugung ist eine bestimmte Gesamtdosis „Buttergelb“ erforderlich, ohne Rücksicht darauf, über welche Zeit sie zwischen 34 Tagen und einem Jahr verteilt wird. Die Latenzzeit ist in diesem Bereich der Höhe der täglichen Dosis umgekehrt proportional.
3. Bei längerer Versuchsdauer, die sich über die ganze Lebenszeit der Ratten erstreckt, genügt sogar eine kleinere Gesamtdosis. Das deutet auf eine Zunahme der Krebs-Disposition im Alter hin.
4. Die Größe der zur Krebsauslösung notwendigen Gesamtdosis „Buttergelb“ kann als Maß für die Größe der vorhandenen Krebsdisposition dienen.
5. Die Streuung der Versuchsergebnisse ist mit nicht mehr als 10% auffällig gering. Daraus ergibt sich die Folgerung, daß zum Geschwulstwachstum eine Mindestzahl von erzeugten Krebszellen vorhanden sein muß.
6. Die Effekte auch der kleinsten Einzeldosen bleiben bei diesem Farbstoff über die ganze Lebenszeit der Ratten voll summationsfähig bestehen.
7. Da in dieser Zeit häufig Zellteilungen stattgefunden haben, müssen die gesetzten Effekte auf die Tochterzellen übertragen worden sein. Die Zellbestandteile, an denen die cancerogene Wirkung ansetzt, haben also die Fähigkeit zur Selbstproduktion, d. h. der Effekt ist erblich.
8. Nach den vorliegenden Ergebnissen bestehen zwischen krebsiger Entartung und genetischer „Mutation“ zumindest quantitative Unterschiede.
9. Der einfache reaktionskinetische Ansatz erweist sich für die Wirkung cancerogener Agenzien auf den fraglichen Zellbestandteil anwendbar. Er erklärt eine Reihe bisher unerklärbarer Phänomene zwanglos und führt zu weiteren klaren Problemstellungen.
10. Die „Treffertheorie“ wird auf den gleichen reaktionskinetischen Ansatz zurückgeführt.
11. Die krebserzeugende Wirkung unterliegt genau so bekannten physikalisch-chemischen Gesetzmäßigkeiten wie jede andere Wirkung auch.
12. Der Farbstoff „Buttergelb“ ist bei dauernder Zufuhr auch in kleinsten Dosen schädlich und deshalb als Lebensmittelfarbstoff abzulehnen.