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  • 1985-1989  (12)
  • 1
    Electronic Resource
    Electronic Resource
    The Schwinger functions of a rational interaction: Local existence of the Borel transform (1989)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 1007-1008 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The local existence of the Borel transform of a two-dimensional field theoretical model characterized by the rational interaction g2x6/(1+gx2) is proven.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.528366
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  • 2
    Electronic Resource
    Electronic Resource
    Speckle interferometer for thermal expansion measurements (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 78-82 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: This paper describes a real-time speckle interferometer specially designed to measure the thermal expansion of a large class of intermetallic compounds for which surface optical treatments are difficult or even impossible. The instruments' 5% accuracy, experimentally checked over the range 300–900 K, makes it a more accurate and cheaper alternative to the x-ray devices commonly used for the above-mentioned compounds. Moreover, the extreme simplicity of the optical setup allows an almost immediate alignment procedure and therefore makes the instrument suitable for routine measurements. The advantages of simultaneous measurements in different spots of the sample surface are also outlined. A comparison with standards, together with the measured expansion anomaly of an intermetallic compound (Ce24Co11) are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139518
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The β decay of tellurium 135 and 137 (1985)
    Springer
    The European physical journal 321 (1985), S. 255-263 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Tellerium 135 and 137 nuclei were produced in thermal neutron fission of235U separated by on-line isotope separator and deposited on a movable tape. Gamma ray singles,γ-γ, β-γ coincidences and time sequencedγ spectra were collected using Ge(Li) detectors and scintillator (NE 102 A) telescope. The half-lives and mass excesses of135Te and137Te were measured and level schemes of135I and135I have been established. The level scheme of135I has been compared to different shell model calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01493446
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    High transverse momentum π0 production by π− and π+ on protons at 280 GeV/c (1987)
    Springer
    The European physical journal 37 (1987), S. 39-50 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The inclusive cross sections for π0 production by π− and π+ on protons have been measured with a beam momentum of 280 GeV/c using a fine grained electromagnetic calorimeter and the CERN Omega spectrometer. The transverse momentum and Feynmanx F ranges covered are 4.0〈p T 〈7.0 GeV/c and −0.45〈x F 〈0.6 respectively. The data are compared with leading order QCD calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01442066
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  • 5
    Electronic Resource
    Electronic Resource
    High transverse momentum prompt photon production by π− and π+ on protons at 280 GeV/c (1988)
    Springer
    The European physical journal 37 (1988), S. 535-544 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The inclusive cross sections for prompt photon production by π− and π+ on protons have been measured with a beam momentum of 280 GeV/c using a fine grained electromagnetic calorimeter and the CERN Omega spectrometer. The transverse momentum and Feynmanx F ranges covered are 4.0〈p T 〈7.0GeV/c and −0.45〈x F 〈0.55 respectively. A quantitative comparison of the prompt photon cross section with next-to-leading order QCD predictions using Duke and Owens structure functions is performed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01549712
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Long-lived high spin states in156Er: Signature for a prolate-to-oblate shape transition (1985)
    Springer
    The European physical journal 320 (1985), S. 699-700 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Lifetimes and feeding times of high spin states in 156 Er have been measured employing the recoil distance method in the reaction 123 Sb(37 Cl,4n) at bombarding energies of 158 and 166 MeV. The yrast states up to spin 20 Ϝ were found to be collective. These levels are fed, however, from long-lived high spin states, causing time delays up to ∼ 100 ps, the existence of which is interpreted as a signature for an oblate shape at high spin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01411877
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  • 7
    Electronic Resource
    Electronic Resource
    Production of high transverse momentum prompt photons and neutral pions in proton-proton interactions at 280 GeV/c (1988)
    Springer
    The European physical journal 38 (1988), S. 371-382 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The inclusive cross sections for production of prompt photons and π0 s by 280 GeV/c protons incident on a liquid hydrogen target, have been measured forp T in the range 4.0 to 6.5 GeV/c and for |x F |〈0.45. A quantitative comparison of the prompt photon cross section with next-to-leading order QCD predictions using Duke and Owens structure functions is performed. Phenomenological fits to the π0 and prompt photon cross sections are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01584385
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  • 8
    Electronic Resource
    Electronic Resource
    Total cross sections of reactions induced by neutron-rich light nuclei (1989)
    Springer
    The European physical journal 332 (1989), S. 457-465 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.-k ; 07.75.+h ; 21.10.Gv ; 25.70.Np ; 27.20.+n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Total nuclear reaction cross-sections are determined by means of a 4π-γ method. The results cover a wide span of targets for various stable beams. The validity of the method is shown in a combined systematics including also the results of transmission-type experiments. The data are very well described by the formula developed by Kox et al. The same method is applied to secondary fragment beams produced from a 44 MeV/u22Ne beam on a 332mg/cm2 181Ta target. Using the LISE spectrometer the fragments4, 6He,6–9, 11Li,7, 9–12, 14Be,10–15, 17B11–19C,13–19N,15–21O,18– 21F and20,21 Ne are analyzed and transported to interact with a 199.4 mg/cm2 Cu target surrounded by a 4π-γ counter. The measured total reaction cross-sectionsσ R are discussed in terms of the reduced strong absorption radiusr 0 and compared with other experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292431
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Calorimetric studies of the magnetic transition of Gd in Gd-La alloys (1985)
    Springer
    Journal of thermal analysis and calorimetry 30 (1985), S. 1293-1300 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mit einem adiabatischen Kalorimeter ausgeführte, sich über einen weiten Temperaturbereich erstreckende Wärmekapazitätsmessungen an festen h. c. p. Lösungen von Lanthan in Gadolinium und die Temperaturabhängigkeit der ferromagnetischen Umwandlung von Gd beim Legieren mit La werden einer Betrachtung unterzogen. Die Härteeffekte des Legierens werden erörtert. Bei Raumtemperatur wurde eine lineare Abhängigkeit des molaren Volumens von der dem Vegard'schen Gesetz nahekommenden Konzentration festgestellt; die Effekte einer Umwandlung zweiter Ordnung werden erörtert.
    Abstract: Резюме В адиабатическом кал ориметре в широком температурном интер вале были проведены измерения теплоемкостей тверд ых растворов лантана в гадолиние с гексагональной плотноупакованной с труктурой и была опре делена температурная завис имость ферромагнитн ого перехода гадолиния в сплаве его с лантаном. Отмечены эффекты отверждения, наблюдаемые при сплавлении двух э лементов. Установлен ная при комнатной температу ре линейная зависимо сть молярных объемов от к онцентрации, близка к закону Вегарда, что указывае т на переход второго рода.
    Notes: Abstract Heat capacity measurements on h.c.p. solid solutions of lanthanum in gadolinium have been performed in an adiabatic calorimeter over a wide temperature range, and the temperature-dependence of the ferromagnetic transition of Gd by alloying with La has been evaluated. The hardening effects of this alloying are pointed out. A linear dependence of the molar volume on the concentration, close to Vegard's law, is found at room temperature; the effects of a second-order transition are outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01914298
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  • 10
    Electronic Resource
    Electronic Resource
    The phase diagram of the Ce-Sn System up to 50 AT.% Sn (1988)
    Springer
    Journal of thermal analysis and calorimetry 34 (1988), S. 451-456 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Das Phasendiagramm des Systems Ce-Sn wurde im Bereich von 0–50% Zinn mittels DTA, Röntgendiffraktometrie und metallographischer Analyse untersucht. Vier intermediäre Phasen wurden in diesem Bereich gefunden: Ce3Sn (940 °C), Ce5Sn3 (1505 °C), Ce5Sn4 (1510 °C) und Ce11Sn10 (∼1400 °C). Eine von diesen (Ce5Sn4) schmilzt kongruent. Ein eutektisches und ein eutektoides Gleichgewicht wurden bei 725 °C (4 Atom-% Sn) bzw. 190 °C (2 Atom-% Sn) festgestellt. Auf die Unterkühlungseffekte der Hochtemperaturphasen 5∶3,5∶4 und 11∶10 wird eingegangen. Eine sich in Grenzen haltende feste Lösung wurde in der Ce5Sn3-Phase gefunden.
    Abstract: Резюме Используя дифференц иальный термический анализ, рентгеноструктурны й и металлографический анализы, исследована фазовая диаграмма системы Ce-Sn в области содержания олова 0–50%. О бнаружены четыре про межуточные фазы состава Ce3Sn (940°), Се5Sn3 (1505°), Ce5Sn4 (1510°) и Се11Sn10 (∼ 1400°), и з которых третья конгруэнтно плавитс я. При 725° и около 4 атомных % оло ва, а также при 690° и окол о 2 атомных % олова устано влено, соответственно, эвте ктическое и эвтектои дное равновесия. Для высок отемпературных фаз (5∶ 3, 5∶4и 11∶10)отмечены эффект ы переохлаждения, а дл я фазы 5∶3 обнаружена еще незна чительная твердотельная раств оримость.
    Notes: Abstract The phase diagram of the Ce-Sn system was investigated in the 0–50 percent tin composition range, using differential thermal, X-ray and metallographic analyses. Four intermediate phases were found in this range: Ce3Sn (940 °C), Ce5Sn3 (1505 °C), Ce5Sn4 (1510 °C) and Ce11Sn10 (∼ 1400 °C). One of them melts congruently: Ce5Sn4. A eutectic and a eutectoid equilibrium were found at 725 °C, ∼4 at.% Sn and 690 °C, ∼2 at.% Sn, respectively. The undercooling effects of the high temperature phases (5∶3, 5∶4 and 11∶10) are pointed out. A slight solid state solubility was found for the Ce5Sn3 phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01913184
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