bluuebunny/crossref_metadata_2025_split huggingface dataset:
Partial r8-and r0-Structure, Direction of the Dipole Moment and Quadrupole Coupling Tensor in Methanesulfenyl Chloride(CH3SCl)
Authors: Guarnieri A. , Charpentier L. , Kück B. 
Published: February 2015

The microwave spectra of three further isotopic species of methanesulfenyl chloride have been investigated. These results together with the results of investigations of isotopic species previously studied enable the calculation of a more accurate r0-structure.
The rs-distance of the S-Cl bond has been determined. Orientation and direction of the dipole moment and the total quadrupole coupling tensor have also been obtained.
The Molecular Zeeman Effect in 2-Methylfuran
Authors: Czieslik W. , Andresen U. , Dreizler H. 
Published: February 2015

The rotational Zeeman effect in 2-methylfuran has been measured and the results are compared with those of furan. The Zeeman parameters for the torsional A-species are gaa = -0.0704 ± 0.0005, gbb = -0.0335 ± 0.0004, gcc = +0.0253 ± 0.0005, 2 χaa - χbb - χcc = (23.6 ±0.9) · 10-6 erg/(G2 mole), 2 χbb - χaa - χcc = (44.2 ± 0.7) · 10-6 erg/(G2mole). The corresponding values of the torsional E-species agree with those of the A-species within twice the standard deviation.
The out-of-plane minus the average in-plane components of the magnetic susceptibility, ⊿χ = χcc - 1/2 (χaa + χbb), for 2-methylfuran and furan are compared. The substitution of a methyl group for a proton in the 2-position of furan changes ⊿χ by + (4.8 ± 1.0) · 10-6 erg/(G2mole).
Unified Analysis of the Metal Vapour Arc
Authors: Ecker G. 
Published: February 2015

Abstract
for given values of the total current density j and the cathode spot surface temperature T a unified and consistent calculation of the cathode drop, Uc , the electron temperature in the ionization region T _- the electron emission current density je , the ion current density j+ , and the extension of the space charge region lsp are presented.
We find that the counter diffusion of plasma electrons into the space charge region plays a decisive role. It causes an effective space charge region extension lsp of a few plasma electron Debey lengths which in general is much less than the ion mean-free-path commonly used. Without the effect of the counter diffusing electrons, the theoretical results deviate from the experimental data by orders of magnitude.
For the example of a Cu metal vapour-or vacuum arc the cathode drop is found to be approximately Uc = 15 [V], the electron temperature about T- =25000 [°K] and the ratio j+/j= 0.5.
Since the analysis allows for multiple ionization the presence of multiply charged ions in the spot area can be calculated.
The results of this investigation justify within the E-areas the approximations used in the analysis for the copper arc in an earlier investigation 1. Outside these E-areas a recalculation with the new results derived here may cause markable changes.
The Equation of State for a one-component System
Authors: Neumann H. P. 
Published: February 2015

The cooperative problem for a lattice gas on a plane, square lattice and on a simple cubic lattice is solved by a system of two coupled, transcendental equations, derived by a combinatorial method, which describes a homogeneous or periodical particle density on the lattice as a function of the temperature and the chemical potential of the lattice-gas.
For the particle interaction a Hard-Core potential (nearest neighbour exclusion) with a soft long-range tail is assumed. The zero-component of the Fourier-transform of this long-range interaction part can be positive or negative.
The system of transcendental equations is solved by a graphic method. As a result, the complete pressure-density state diagram and the pressure-temperature phase diagram can be drawn.
The lattice-gas exists in three stable phases: gas, liquid and solid. Three phase changes are possible: condensation, crystallization and sublimation.
Critical points of condensation and freezing are examined. The number of possible phases and phase changes at a fixed temperature depends on the geometric structure of the particle interaction.
Zeeman-Effekt im Mikrowellenrotationsspektrum der AlF-Molekel / Zeeman Effect in the Microwave Rotational Spectrum of the AIF Molecule
Authors: Honerjäger R. , Tischer R. 
Published: February 2015

The Zeeman effect in the microwave rotational spectrum of 27Al19F has been measured in the ground vibrational state υ = 0 in order to determine the gJ-factor and the molecular magnetic susceptibility anisotropy ξT :
gJ=-0.08051(8) ; ξT/h=434(38)Hz/(kG)2 .
The molecular quadrupole moment and its electronic part are derived from the values of g j ,ξT , and the rotational constant B0 . - The spectrum obtained in the magnetic field exhibits resolvable hyperfine structure from the 27Al nucleus with spin l = 5/2 and enabled us to determine the magnetic shielding anisotropy of this nucleus:

σT=-224(71)·10-6.
This value agrees reasonably well with an estimated one obtained from an interrelation with the spin-rotation interaction constant cl .
Arrhenius-Parameter und kinetischer Isotopeneffekt für die Reaktion von Wasserstoffatomen mit Silan
Authors: Potzinger Peter , Glasgow Louis C. , Reimann Bruno 
Published: February 2015

The Reaction of Hydrogen Atoms with Silane; Arrhenius Parameters and Kinetic Isotope Effect Relative rate constants were measured for the systems H + C2H4/SiD4 and D + C2D4/SiH4 over a wide temperature range. From the known arrheniusparameter for the reaction H + C2H4 the activation energy EA and the preexponential factor A of the abstraction reaction
H + SiD4 → HD + SiD3

may be calculated. Values of EA = 3.2 kcal/Mol and A = 4.92 • 1013 cm3 Mol-1 sec-1 were obtained. Upper limits for the kinetic isotope effects are given in the paper
Über das Einstein-Podolsky-Rosen Paradoxon / On the Einstein-Podolsky-Rosen Paradox
Authors: Mittelstaedt P. 
Published: February 2015

The EPR experiment is analysed in terms of ordinary quantum mechanics and shown to be compatible with the orthodox interpretation of this theory. There is no need to refer to Bohrs resolution of the EPR paradox, nor is it necessary to assume any further unusual properties of the quantum physical reality. In particular, it is shown that the EPR experiment does not contradict the fact that incommensurable properties cannot be objectivized simultaneously in a quantum mechanical system, and that the measuring process can be understood in terms of quantum theory as an interaction of the measuring apparatus and the object system.
From these results it follows that there is no reason to search for modifications of the quantum theory which might be more convenient for a realistic interpretation of the EPR experiment. Furthermore, the EPR experiment cannot be used as a motivation for introducing hidden variables into the quantum theory. Experimental investigations which try to test quantum mechanics in respect to the possibility of introducing local hidden variables can therefore not be justified by the EPR paradox.
Investigation of the Afterglow in Helium-Xenon Mixtures at High Pressures
Authors: Zinko H. , Johansson J. 
Published: February 2015

The behaviour of high pressure helium afterglows has been measured by means of conductivity and light intensity decay measurements. The plasma was created in a pulsed discharge of typically 30 μsec length and then investigated by means of time resolved spectroscopy and probing pulse diagnostics under conditions which are of interest for noble gas afterglow MHD generators, i. e. a pressure range of 1-4 atm static pressure, the temperature varying from 600 - 970 °K.
A marked increase in plasma lifetime was found when xenon was seeded with a rate of 10-4 to 10-3 to helium. This effect is ascribed partly to the influence of Penning ionization and partly to the fact, that slowly recombining atomic xenon ions dominate the recombination behaviour at the lower xenon seed rates during the investigated time interval of 150 μsec. The pressure dependent effective recombination coefficient is found to be (0.95 + 1.95 · 10-3 P0) 10-8 cm3 sec-1 for pure helium and (0.2 + 5.1 · 1O-4 P0) 10-8 cm3 sec-1 for a xenon seed rate of 3 · 10-4 (P0 = reduced pressure in Torr).
Linienstärken in der 4-0- und 5-0-Rotationsschwingungsbande von Fluorwasserstoff / Line Strengths in the 4-0- and 5-0-Rotation-Vibration-Bands of Hydrogen Fluoride
Authors: Rimpel G. 
Published: February 2015

The strengths of 6 lines in the 4-0- and 5-0-rotation-vibration-bands of hydrogen fluoride have been measured in a multiple reflection cell using a direct measurement method. The absolute values of the rotationless matrix elements of the electric dipole moment have been determined to be
|<4|μ(r)|0>| = (3.48 ± 0.13) · 10-22 esu · cm,
|<5|μ(r)|0>| = (8.79 ± 0.54) · 10-23 esu · cm.
Energy Levels of 53Mn from the β-Decay of 53Fe
Authors: Canto L. F. , Barros S. de 
Published: February 2015

Abstract
The γ rays following the β-decay of 53Fe were investigated with high resolution detectors. Two unreported weak transitions were detected at the energies 1177 ± 1 keV and 2305 ± 1 keV. Log ft values were determined and spin and parity assignments made. On the basis of the results attained, a new decay scheme was proposed. Comparison with theoretical calculations are made.
Ultra Violet and Visible Spectra of Some Divalent Transition Cupferrone Complexes
Authors: Ela A. H. Abou El , Afifi H. H. 
Published: February 2015

Abstract
The UV and visible absorption spectra of the ammonium salt of cupferrone and manganese, cobalt, nickel, copper and zinc divalent cupferrate complexes are investigated. The absorption bands observed are given and assigned on the basis of ligand field theory. In the UV absorption spectrum of the cupferrone metal complexes a characteristic shift in the maxima and minima appears. The effect of solvent on this shift was investigated.
Die 0,71 μm-Spektralstruktur der Photoleitung von trigonalem Selen
Authors: Keßler F. R. , Grohs P. 
Published: February 2015

Abstract
The photoconductivity spectrum of trigonal selenium shows a relative maximum at 0.71 μm. Measurements in the range from 0.6 μm to 0.8 μm at various quantum fluxes and modulation frequencies (4.2 - 216 Hz) indicate that two different recombination mechanisms, one at shorter and one at longer wavelengths than 0.71 μm, are operative, the former being nonlinear and the latter linear. The absorption and reflection spectra were measured too. At the wavelength of change in the recombination mechanism the depth of penetration of the radiation is about 15 μm. This depth correlates with the mean distance between the potential barriers involved in the photoactivated mobility in selenium.
A Soft X-ray Appearance Potential Spectroscopy Study of the Oxidation of Nickel
Authors: Ertl G. , Wandelt K. 
Published: February 2015

Abstract
Variations of the electronic properties of nickel during the first stages of oxidation were studied by means of the soft x-ray appearance potential spectroscopy (APS). The spectra consist of a superposition of contributions from metallic nickel and from NiO and yield no evidence for a continuous change of the oxidation state of the Ni atoms. The binding energy of the 2p3/2-electrons in metallic nickel was found to be 851 eV and is increased in NiO by 1.4 eV. It is concluded from the shape of the APS peaks that with Ni above the Fermi level 3d- and 4s-bands are superimposed whereas with NiO these are separated in energy.
Die Erniedrigung der Ionisationsenergie des C II-Ions in einem Hochdruckplasma
Authors: Ehrich Horst , Kusch Hans Jürgen 
Published: February 2015

Abstract
The lowering of the ionization potential of singly ionized carbon has been determined from measurements of the high - pressure plasma produced by capillary - discharges in plexiglass. Line intensities of C III 2297 Å and C II 2509/2511 Å as well as the electron density from the profile of Ha were obtained side-on by the use of a rapid-scan method while the temperature of the plasma was derived from simultaneous multi-channel-measurements of the optically thick end-on radiation of the plasma column. Rather good agreement is found with the results of the theoretical approaches based on polarization-effects in plasmas.
Intramolecular Force Field of Some Tetrahedral Thio and Seleno Anions
Authors: Sanyal Nitish K. , Ahmad Parvez 
Published: February 2015

Abstract
The orbital valence force field (OVFF) and the Urey- Bradley force field (UBFF) have been employed to evaluate the force constants of thio and seleno anions of VA, VB, VIB and VIIB group atoms of the periodic table. These constants were utilized to examine the relative strength of chemical bonds in isoelectronic sequences. Further, for these anions, the variation of the ratio L12/L21 with the mass coupling term (T = G12 √|G|) has been studied. This appears to be an excellent support to the extended L-matrix approximation **.
Kristallstruktur und Konstitution des Perchlorbenzocyclobutens (β-C8Cl8)
Authors: Haase J. , Widmann P. 
Published: February 2015

Abstract
The crystal structure of perchlorobenzocyclobutene (β-C8Cl8) has been investigated and solved by means of the unusual Patterson projection along the axis of twinning, by which the space group had been determined. As a result of the crystal structure analysis the constitution of the molecule, derived by J. Brandmüller and E. Ziegler from spectroscopic measurements, has been found to be true.
Die Molekülstruktur des N-Chlorsdiwefeloxiddifluoridimids ClNSOF2 / The Molecular Structure of ClNSOF2
Authors: Oberhammer O. , Glemser O. , Klüver H. 
Published: February 2015

The molecular structure of ClNSOF2 was determined by electron diffraction of gases. The following geometric parameters were obtained:
Cl-N=1.715(5), S=N=1.484(7), S=O=1.394(3), S-F=1.548(3) Å, ∢ ClNS=114.7 (8), ∢ FSF=92.6(.8), ∢ NSF=111.8(.9) ∢ NSO=117.4 (3.1) and ∢ OSF=108.6 (.8)°. The results for the mean square amplitudes of vibration are given in the paper and an attempt is made to explain differences in corresponding parameters of some related molecules.
Mobile and Trapped Triplet States in Single Crystals of Charge Transfer Complexes
Authors: Möhwald H. , Sackmann E. 
Published: February 2015

Homogeneously doped crystals of charge transfer (CT-) complexes were grown by incorporating aromatic guest donors in host CT-crystals. The host crystals contained 1,2.4,5-tetracyanobenzene (TCNB) as acceptor and deuterated aromatic electron donors. By using such doped crystals CT complexes in a well defined configuration may be studied. The triplet states of the guest complexes were used as ESR spectroscopic probes in order to determine the molecular arrangement in the host lattice. The zero-field-splitting (ZFS) parameters, D and E, of the triplet energy traps were determined and the degree of electron derealization in the triplet state was calculated from these values. In some cases a very strong guest host interaction (multicomplex formation) was established. A method for the determination of CT-triplet energies is described (accuracy 200 cm-1) . The phosphorescence spectrum of the anthracene-TCNB complex was obtained from the delayed emission spectra of different anthracene doped CT-crystals. The vibronic structure is identical to that of anthracene, while the O-O-band of the complex is blue shifted by 600 cm-1.
It is shown that the undoped anthracene-TCNB crystal exhibits P-type delayed fluorescence and that the triplet exciton diffusion in this crystal is nearly temperature independent. In the undoped biphenyl-TCNB crystal E-type delayed fluorescence originating from the thermal depopulation of the mobile triplet excitons is established. The remarkable differences of the two types of triplet excitons are interpreted in terms of the different polarity in the triplet states of the two CT-crystals.
Notizen: Über einige Radikalreaktionen im H - O - N-System / On some Radical-reactions in the H–O–N-System
Authors: Hack W. , Hoyermann K. , Wagner H. Gg. 
Published: February 2015

The reactions of OH and HO2, radicals were studied in an isothermal flow reactor using ESR detection technique.
The rate of the reaction
H + O2 + M → HO2 + M (5)
with M = He was measured at T = 300 K k5 = 5 · 1015 cm6/mol2 sec .
Via quantitative measurement of OH-radical concentration by ESR it was shown that the reaction of HO2 radicals with H-Atoms produces mainly OH-radicals.
The reactions
OH + H2O2 → HO2 + H2O (6)
and
NO + HO2 → NO2 + OH (7)
were studied in the temperature range of 298 ≦ T ≦ 670 K.
Massenspektrometrische Untersuchungen an der Plasma-Grenzschicht / Mass Spectrometry at the Plasma Sheath
Authors: Henrich Klaus , Müller Karl Gerhard 
Published: February 2015

Mass spectrometric measurements of positive ions emerging from Ar-plasmas at 0.1-0.6 Torr are described. The adaption of the mass spectrometer requires besides the extraction probe an ion optical system, which causes the focussing and bunching of the ion current on the entrance of the time-of-flight mass spectrometer. Systematic measurements of the velocity distributions of the different ion species reveal:
1. The Bohm-criterion is confirmed. In front of the wall the ions are heated in the quasineutral zone and are accelerated in the space charge zone, which here is in the order of magnitude of the ion mean free path.
2. Heating and accelerating increase with growing ion current to the extraction probe.
3. A further increase of the probe current causes collisions in the space charge zone which gives rise to a drop of the transmission of the optical system.
4. The measurement of the current of one ion species as a function of the probe current is a simple experimental proof for collisions of the ions in the space charge zone.
On the Calculation of Scalar Mesons in Functional Nonlinear Spinor Theory
Authors: Bauhoff W. 
Published: February 2015

Abstract
The formulation of nonlinear spinor theory in functional space is used for the calculation of scalar meson masses. The second order equation used, requires an explicit angular momentum reduction. For illustration, this method is also applied to the first order equation. In second order, we get an integral equation of the Bethe-Salpeter type which is solved in Fredholm approximation.
A Concept of Explaining the Properties of Elementary Particles in Terms of Manifolds
Authors: Ławrynowicz Julian , Wojtczak Leszek 
Published: February 2015

Abstract
The authors propose to explain the magnetic moment of elementary particles by a suitable choice of one pseudo-riemannian manifold - the space of observations - and two general Riemannian manifolds - the spaces of the particle connected with the external electromagnetic and nuclear fields, respectively. By a general Riemannian manifold the authors understand a Riemannian manifold whose associated tensor field is allowed to be degenerate. In this way the mass of a particle as well as its electromagnetic and nuclear properties are determined by means of manifolds and mappings between the corresponding Hilbert spaces. A nuclear reaction is then to be interpreted as a mapping between the corresponding pseudo-riemannian manifolds and the associated general Riemannian manifolds. The proposal, competitive to the quantum field theory, presents a different way of describing the properties of physical objects. At the moment it is difficult to decide whether this proposal will lead to a satisfactory explanation of more physical phenomena than those explained by means of the quantum field theory, since it needs further research.
Das Abklingen der Balmer-Linien des Wasserstoffs nach der dissoziativen Anregung von Benzol und Benzol-D6
Authors: Hartfuss Hans J. 
Published: February 2015

Abstract
The decay-curves of the excited fragments H, D, CH, and CD, produced by the impact of 250 eV-electrons on benzene and benzene-d6 , are measured in a crossed-beam-experiment. The lifetimes of the A2 ⊿-state of CH and CD are determined to be 443 ± 5 ns. Furthermore it is found that the Balmer-lines of hydrogen as well as those of deuterium have a common decay-component, which is 77 ± 3 ns and 145 ± 5 ns in the case of H and D respectively. Because of the strong isotope effect, this behaviour is ascribed to a dissociating state of the benzene-molecule.
Die photochemische Abbaurate des Schwefeldioxids in der unteren Atmosphäre Mitteleuropas
Authors: Penzhorn R.-D. , Filby W. G. , Güsten H. 
Published: February 2015

Abstract
The homogeneous removal rate of sulfur dioxide from the lower atmosphere of Central Europe has been calculated on the basis of the photophysical data of SO2 within its absorption bands (2900 -4000 Å) and the measured monochromatic actinic irradiance (solar quantum flux) in Central Europe. The maximum rate of the sunlight-induced photooxidation during the summer was found to be 0.25% per hour. The results are compared with those obtained from experiments in simulated and real atmospheres.
Absorptions- und Emissionsspektrum von V2+ /V3+ in Beryllen
Authors: Schmetzer K. , Eysel H. H. 
Published: February 2015

Abstract
Absorption and emission spectra of beryls doped with a mixture of less than 0.1% V2+ and V3+ have been measured. The resulting crystal field parameters are:
V2+: Dq= 1500 cm-1 , B = 750 cm-1 , C = 3250 cm-1;
V3+: Dq= 1750 cm-1 , B = 580 cm-1 C = 2480 cm-1.
Within the frequency range of our spectrometers the V3+ is dominating in absorption while V2+ produces the observed emission spectrum by superposition of the 4T2-4A2 fluorescence and 2E, 2T -4A2 phosphorescence bands. We were not able to observe emission of V3+
Berechnung angenäherter Intensitätswerte Raman-aktiver Molekülschwingungen mit Hilfe eines modifizierten CNDO/II-Verfahrens
Authors: Bleckmann P. 
Published: February 2015

Abstract
The line intensities in Raman spectra of molecules are determined by means of a perturbation calculation. For this purpose the vibrating molecule was considered under the conditions of static electric fields causing the perturbation in directions parallel to the axis of a Cartesian co-ordinate system of the molecule. The calculated perturbation terms are inserted into the Hartree-Fock - Operator used in the CNDO/II-theory6. This calculation yields the induced dipole moment as a function of the normal coordinate Q, from which the polarizability change upon Q is obtained.
Direkte Bestimmung des absoluten Vorzeichens des Triplett- Nullfeld-Parameters D mit hochauflösender optischer Detektion von ESR / Direct Determination of the Absolute Sign of the Triplet Zero Field Parameter D by High Resolution Optical Detection of ESR
Authors: Schuch H. , Seiff F. , Furrer R. , Möbius K. , Dinse K. P. 
Published: February 2015

The electronic triplet state sublevels of aromatic molecules generally have different energies already at zero external magnetic field. This zero field splitting usually is too small to be resolved by a high resolution optical spectrometer, and only a high magnetic field (typically 30 kG) yields enough Zeeman-splitting to allow full resolution. From the Zeeman pattern one can extract the absolute sign of the triplet parameter D, which probes the electronic wavefunction of the triplet state.
Compared with purely optical methods with their inherent lack of resolution, we demonstrate that a double resonance method yields the sign of D even in relatively small magnetic fields due to the improved optical resolution.
This double resonance method is a modification of Optical Detection of ESR (ODMR). Now the sign determination seems to be a routine procedure.