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1978[X]
121Author    W. M. AnzkeRequires cookie*
 Title    The Effect of the A (1236)-Resonance in Nuclear Matter  
 Abstract    The effect of the resonant A (1236)-states in nuclear matter, is studied within the framework of the exp(S)-formalism [1, 2]. Treating the Schrödinger-Equation of the ground state of an A-particle fermion system with the help of the exp (<S)-formalism one obtains a system of A coupled equations which all together are equivalent to the A particle Schrödinger equation. Neglecting three-and more particle forces as well as more particle effects the ground state of the A -particle system is described by the coupled system of one particle and two-particle-equations. Considering the special conditions of nuclear matter the one particle equations turn out to be trivial while the two particle equations reduce to a generalized Bethe-Goldstone-equation. After decomposition of these equations into partial waves we obtain a computable set o f coupled integro-differential equations. These equations are fully selfconsistently solved including all partial waves up to total spin J — 2. Numerical calculation shows that the effects produced by Zl-Zl-partial waves are comparable to those produced by N -J -partial waves. Transitions from the N-N channels to N-/1 or A-A channels are caused by nonrelativistic potentials obtained from the static limit of meson theory. The N-N-interaction is described by a Reid-potential which is modified in order to re­ produce the two particle dates (N-N phase shifts, deuteron). 
  Reference    Z. Naturforsch. 33a, 861—8 (1978); received April 17 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0861.pdf 
 Identifier    ZNA-1978-33a-0861 
 Volume    33 
122Author    J. Conrad, H. D. ZehRequires cookie*
 Title    On the Reliability of the Re/Os Chronometer  
 Abstract    Plausible astrophysical conditions may have substantially increased the rate of 187Re-decay, thereby invalidating the Re/Os nuclear chronometer. Moreover, if one assumes th a t solar system m a tte r has not been exposed to such conditions, then discrepancies between th e obtained age of the nuclei and presently accepted Hubble ages appear to exist. These discrepancies prevail w ith certainty if the Os/Re abundance ratio resulting from empirical abundance system atics is accepted instead of the somewhat lower ratio measured for meteorites. 
  Reference    Z. Naturforsch. 33a, 887—889 (1978); received May 19 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0887.pdf 
 Identifier    ZNA-1978-33a-0887 
 Volume    33 
123Author    H. Hora, P. S. RayRequires cookie*
 Title    Increased Nuclear Fusion Yields of Inertially Confined D T Plasma due to Reheat  
 Abstract    The efficiency of energy release has been calculated here for fusion reactions in inertially con­ fined plasmas of high density. I t is found th a t inclusion of reheat due to absorption of th e energetic alphas released by the reactions in the plasma itself predicts higher gains G due to ignition. Including losses by brem sstrahlung and fuel depletion we find G = 71 for 1 k J laser energy input w ith a compression of only 1000 times solid state density. 
  Reference    Z. Naturforsch. 33a, 890—894 (1978); received Novem ber 21 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0890.pdf 
 Identifier    ZNA-1978-33a-0890 
 Volume    33 
124Author    C. Gorse, M.M A Cacciatore, CapitelliRequires cookie*
 Title    Some Aspects in Recombining Transient Nitrogen Plasmas  
 Abstract    The tem poral evolution of th e population densities of a monatomic Nitrogen plasm a has been studied in th e electron tem perature range 0.5 eV ^ k T e ^ 1 eV and in th e electron num ber density interval 1012 cm-3 ^ n e ^ 1014 cm-3 by solving a coupled system of m aster equations. The results show th a t th e tim es necessary to achieve quasi-stationary conditions for the popula­ tion densities can be as long as 10-5 sec. in th e optically thick plasma, and two order of m agnitude shorter in the optically th in case. The possibility of population inversions during th e recom bina­ tion of a completely ionized N itrogen plasm a (ne ~ 1015 cm-3, k T e = 0.5 eV) is then shown. 
  Reference    Z. Naturforsch. 33a, 895—902 (1978); received April 17 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0895.pdf 
 Identifier    ZNA-1978-33a-0895 
 Volume    33 
125Author    MarthaK. HeitzmannRequires cookie*
 Title    Magnetische Wechselwirkung der Elektronen II* Magnetic Interaction of Electrons  
  Reference    Z. Naturforsch. 33a, 903—906 (1978); eingegangen am 26. April 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0903.pdf 
 Identifier    ZNA-1978-33a-0903 
 Volume    33 
126Author    Requires cookie*
 Title      
 Abstract    r ^ n c m (ft>o2 — co2) 2 + co2 F 2 (I) This equation is derived as follows: The absorption A is given by I I n K d Jo = A since 4 n e2 .4 = 1 -£ 2 = N for K d < 4 A o)F m (coo2 — co2) 2 + ft»2 r 2 and £ 2 = 2 n K 
  Reference    Z. Naturforsch. 33a, 907 (1978) 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0907.pdf 
 Identifier    ZNA-1978-33a-0907 
 Volume    33 
127Author    H. Rauh, D. KernRequires cookie*
 Title    Theoretische Untersuchungen an einem Elektronenstrahlerzeuger mit Spitzenkathode  
 Abstract    Electron-optical properties of a gun w ith a point cathode are determ ined num erically by tra c ­ ing a greater num ber of electron trajectories. In order to calculate th e beam current density distribution, an attem p t was made to describe the properties of the gun in term s of the param eters describing the initial conditions of the trajectories. Contrary to th e conventional electron-optical imaging theory, the electron gun under consideration cannot be sufficiently characterized by a few aberration coefficients, since only a small fraction of the trajectories forming th e electron beam would be covered by an expansion containing linear, th ird and fifth order term s, so th a t the series expansion m ethod is not applicable. 
  Reference    Z. Naturforsch. 33a, 910—913 (1978); eingegangen am 12. Mai 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0910.pdf 
 Identifier    ZNA-1978-33a-0910 
 Volume    33 
128Author    Z-ORequires cookie*
 Title    v w  
 Abstract    Fig. 1. A linearly polarized standing light wave o f fre­ quency f q as a resonant mode o f a F ab ry -P ero t resonator. The totally reflecting m irror M l is assumed to s ta rt a t t = 0 a small parallel displacem ent a t velocity v = I, t resulting in an optical resonator length I (t) = lo + J v dt. The o 
  Reference    Z. Naturforsch. 33a, 914 (1978) 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0914.pdf 
 Identifier    ZNA-1978-33a-0914 
 Volume    33 
129Author    F. Müller, E. SchulteRequires cookie*
 Title    Shock Wave Compression of NaCl Single Crystals observed by Flash-X-Ray Diffraction  
 Abstract    Flash-x-ray-diffraction pattern s (FX D) with an exposure tim e of 4 ns of XaCl single crystals compressed bv plane shock waves are obtained a t pressures of about 30 kbar. From the diffraction p atterns the compression is determ ined and compared w ith Hugoniot d ata. During shock load the lattice shows an uniaxial compression. While in case of m easurem ents a t the free surface an observation tim e of only a few nanoseconds is available, this experim ental set-up allows an observation tim e of two microseconds. 
  Reference    Z. Naturforsch. 33a, 918 (1978); received April 4 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0918.pdf 
 Identifier    ZNA-1978-33a-0918 
 Volume    33 
130Author    M. Nippus, R. ClausRequires cookie*
 Title    The Influence of Photorefractive Index Change on Raman Scattering Intensities in LiNbOa  
 Abstract    The tim e dependent varying shape of th e laser beam w ithin the scattering volume in R am an scattering experiments on LiNbC>3 influences th e recorded spectra and can be studied spectro­ scopically by forward-, right angle-, and backw ard-scattering geometries. The recorded spectra allow a tim e resolved insight into th e microscopic local changes of th e refractive index. The decay constant of the scattered phonon intensity is a well defined function of the laser power. I t furtherm ore showed to be characteristic for the individual sample. R am an spectroscopy thus seems to provide a m ethod to determ ine th e concentration of Fe-impurities. We have observed th a t ordinary photons influence th e optically dam aged regions of the sam ple whereas undamaged regions are left alm ost unchanged. D am ped cut-in oscillations recorded when illuminating the sample alternatingly w ith ordinary and extraordinary laser light seem to originate from local fluctuations of an excited cloud of im purity electrons. The observation of undam ped periodic break downs of the scattering intensity from polaritons and back scattered phonons is reported. 
  Reference    Z. Naturforsch. 33a, 924—933 (1978); received May 20 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0924.pdf 
 Identifier    ZNA-1978-33a-0924 
 Volume    33 
131Author    W. Gauß, S.A R Günther, M. Haase, D. Kerber, J. Kessler, H. Kronenbitter, 0. Krüger, A. Lutz, P. Nolle, M. Schrade, G. E. Schüle, SieglochRequires cookie*
 Title    N M R Spectra of Alkali and H alogen Nuclei in Alkali and H alogen Salts  
 Abstract    NMR signals of 7Li, 23Na, 35C1, 39K , 79B r, 87R b and 127I have been measured in various alkali and halogen salt powders relative to well defined aqueous solutions. W ith the known shielding constants of some of these solutions the nuclear magnetic shielding constants of the alkali and chlorine nuclei in crystalline powders were evaluated in the atomic reference scale. The theoretical values of the shielding constants in alkali halides do not agree even in the order of magnitude with the experimental ones in some cases. For 23Na first-order and second-order quadrupole patterns have been observed and the quadru­ pole coupling constants are given. 
  Reference    Z. Naturforsch. 33a, 934—939 (1978); received May 11 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0934.pdf 
 Identifier    ZNA-1978-33a-0934 
 Volume    33 
132Author    K. T. Waseda, Ja Co, Y. Tsuchiya, S. TamRequires cookie*
 Title     
 Abstract    The Gibbs-Bogoliubov formalism in conjunction with the pseudopotential theory is applied to the calculation of the vapour pressure of eight liquid metals from Groups I to IV of the periodic table and o f alloys (Na-K). The calculated vapour pressure o f the elements and their temperature dependencies, the partial pressures, activities and boiling points of the alloys are all found to be in reasonable agreement with measured data. 
  Reference    Z. Naturforsch. 33a, 940 (1978); received May 3 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0940.pdf 
 Identifier    ZNA-1978-33a-0940 
 Volume    33 
133Author    P. R. SarodeRequires cookie*
 Title    X -R a y L m Absorption Edges of Bismuth Halides  
 Abstract    The position of the bismuth L m absorption discontinuity has been studied in pure bismuth metal and in its halides, B iF 3 , BiCl3, B iB r3 and BÜ 3 using a focussing spectrograph of the trans­ mission (Cauchois) type. In all these compounds the discontinuity is found to shift towards the high energy side with respect to that in the pure metal. The experimental material presented in this study convincingly shows th a t the position of the L m absorption edge is determined by the partial charge of the absorbing atom and not by its valence. 
  Reference    Z. Naturforsch. 33a, 946 (1978); received March 14 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0946.pdf 
 Identifier    ZNA-1978-33a-0946 
 Volume    33 
134Author    Z. NaturforschRequires cookie*
 Title    Schwingungsspektren der Schwefelringe S8 , 34S8 , S12 und S12 * CS2 sowie therm odynam isdie Funktionen der Moleküle Sn (« = 2 — 12)  
 Abstract    Vibrational Spectra of the Sulfur Rings Sg, MS%, S 12, and S 12 • C S2 and Thermodynamic Functions of the Molecules S n (n = 2 . .. 12) Ram an spectra o f Sg, ^ S s , S 12, and S 12 • CS2 are reported and force constants have been calculated for Ss and S 12 using a modified Urey-Bradley force field. The fundamental vibrations and molecular geometries of Sg and S12 have been used for the calculation of thermodynamic functions. The standard entropies, S!j., as well as the molar heat capacities, Cv , o f sulfur species S n are shown to depend linearly on the molecular size, n, as follows (in J • mole-1 • K -1): S°29S = 35.16 n + 147 .0 , (7P (2 9 8 K) = 21.00 n -11.7 . B y interpolation entropies for S9 , S 10 and S n have been obtained, and these data are used to show that the concentrations of sulfur rings larger small. 
  Reference    Z. Naturforsch. 33a, 951—958 (1978); eingegangen am 30. Mai 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0951.pdf 
 Identifier    ZNA-1978-33a-0951 
 Volume    33 
135Author    Fernando Bernardi, Andrea Bottoni, FrancescoPaolo Colonna, Giuseppe Distefano, Ugo Folli, Piero VivarelliRequires cookie*
 Title    UPS Study of [2,2] (2,5)Fu ran ophane and [2,2] (2,5)Thiophenophane Evidence Regarding the Im portance of T h rou gh Bond and Through Space Interactions  
 Abstract    The ultraviolet photoelectron spectra of [2,2](2,5)furanophane (FU PH) and [2,2](2,5)thio-phenophane (TH PH) have been analyzed on the basis of a perturbational molecular orbital analysis, by comparison with CNDO/2 computations and by correlating them with the spectra of related molecules. Through space and through bond interactions between the two hetero-aromatic rings are shown to be important in determining the ordering of the outermost MO's in this class of compounds. 
  Reference    Z. Naturforsch. 33a, 959 (1978); received April 7 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0959.pdf 
 Identifier    ZNA-1978-33a-0959 
 Volume    33 
136Author    DouglasL. DorsetRequires cookie*
 Title    Transmission E lectron D iffraction Intensities from Real O rganic C rystals: Th in Plate M icrocrystals of Paraffinic Com pounds  
 Abstract    Solvent-grown microcrystals of long polymethylene compounds packing in the 0 ± methylene subcell are found to have some of the defect structures seen for crystalline polyethylene. Crystals composed either of rectangular layers or of oblique layers both exhibit the growth around a screw dislocation characterized earlier by other workers. In addition, rectangular layer crystals o f orthorhombic n-hexatriacontane give evidence of mfralamellar edge dislocations. When rectangular layer crystals of cetyl palm itate are grown from hot ethanol, the same surface corrugations are found as seen earlier for polyethylene and orthorhombic paraffins. Oblique layer crystals have not demonstrated these latter two defect structures. All crystals show evidence o f appreciable bending. As was found to be true for rectangular layers of n-paraffins, bending has some influence on the electron diffraction intensities from an oblique layer. Another important factor is a perturbation due to defects along long chain axes which disrupts the ordered packing of polar regions, and causes incoherent scatter from these regions. In addition, observed screw dislocations give a nonuniform end plane, causing isolation of layers from one another. Diffraction models accounting for bending or isolation o f chain layers in an oblique layer both explain the observed near in­ variance of certain intensities which are due to the coherent scattering from the line grating formed by rows o f carbon atoms in the tilted chain aggregate. Forbidden reflections predicted by a bending model are less important than those anticipated by the multiple scattering from a laminated layer model. As these forbidden reflections are mostly identified for multilayer crystals and since crystal structure analysis indicates most of the long chain in a oblique monolayer to be diffracting coherently, the concentration of Reneker-type defects in the centers of chains is probably not great enough to isolate small chain length laminae within a monolayer. 
  Reference    Z. Naturforsch. 33a, 964 (1978); received March 1 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0964.pdf 
 Identifier    ZNA-1978-33a-0964 
 Volume    33 
137Author    Klaus-Dieter WillamowskiRequires cookie*
 Title    Contributions to the T h eory of Mass A ction Kinetics I I . Representation of Closed and Open K inetics  
 Abstract    B y introducing the notion of //-molar mass action kinetics it will be shown that //-molar mass action kinetics describe completely the qualitative dynamical behaviour of all mass action kinetics. Since there are much fewer //-molar mass action kinetics than general mixed molar ones, this notion reduces the complexity o f investigating mass action kinetics. 
  Reference    Z. Naturforsch. 33a, 983—9 (1978); received May 13 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0983.pdf 
 Identifier    ZNA-1978-33a-0983 
 Volume    33 
138Author    K. Laus-D, Ieter WillamowskiRequires cookie*
 Title    C ontributions to the T h eory of Mass A ction Kinetics III. Some Dynamic Properties of Second Order Mass Action Kinetics  
 Abstract    Second order mass action kinetics provide the simplest models of nonlinear reaction systems. Some o f their dynamic properties, viz., location, number, and stability pattern of their critical points, will be analyzed. The occurrence of periodic and chaotic solutions o f these systems is discussed. 
  Reference    Z. Naturforsch. 33a, 989—992 (1978); received May 13 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0989.pdf 
 Identifier    ZNA-1978-33a-0989 
 Volume    33 
139Author    A.O B AruRequires cookie*
 Title    The Creation of a Photon: A Heuristic Calculation of Planck's Constant h or the Fine Structure Constant a  
 Abstract    A dynamical mechanism is presented to calculate Planck's constant h, hence a. Because the charge inside the electron performs a zitterbewegung, the relativistic radiation theory is applied to this motion o f the charge, rather than to its "center of mass" motion. W ith a small Doppler-correction the value obtained is a-1 = 137.03. Some tests of the theory are suggested. 
  Reference    Z. Naturforsch. 33a, 993—9 (1978); received May 30 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-0993_n.pdf 
 Identifier    ZNA-1978-33a-0993_n 
 Volume    33 
140Author    J. Kamiński, A. Schmillen, A. KawskiRequires cookie*
 Title    Die Zeitabhängigkeit der Emissionsanisotropie und die Resonanzübertragung  
 Abstract    The Time Dependent Emission Anisotropy and the Resonance Transmission Fluorescing solutions excited by linearly polarised light have a time dependent emission aniso­ tropy of the fluorescence due to exchange of excitation energy. By an approximation method we calculate numericaly the decay of this anisotropy for a mean concentration of one molecule in a sphere with the critical transfer radius Ro and for times t t . The result differs from the decay of the anisotropy with exp (— aJ/V/r), given by the Förster Theory, by a factor 0.61 in the ex­ ponent only. A comparison with own measurements gives for anthracene in acethylcellulose a critical transfer radius of 28.5 Ä. 
  Reference    Z. Naturforsch. 33a, 1001 (1978); eingegangen am 30. Januar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_A/33/ZNA-1978-33a-1001.pdf 
 Identifier    ZNA-1978-33a-1001 
 Volume    33 
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