# Publications database

 2017-06-2812:48 [PUBDB-2017-06269] Journal Article et al Measurement of the branching ratios for the decays $\tau \to$ hadron $\pi^0ν$ and $\tau \to$hadron $\eta^0\eta^0ν$ Physics letters / B 259(1-2), 216 - 224 (1991) [10.1016/0370-2693(91)90161-I]   The Crystal Ball detector at the DORIS II storage ring at DESY has been used to measure the branching ratios for the decay modes τ±→h±π0ν and τ±→h±π0π0ν, where h± is any charged hadron. The results are BR(τ±→h±π0ν) = (22.0±0.8±1.9)%, BR(τ±→h±π0π0ν) = (5.7±0.5+1.0−1.7)%. [...] Restricted: PDF PDF (PDFA); 2017-06-2812:43 [PUBDB-2017-06268] Journal Article et al A synchrotron radiation, HRTEM, X-ray powder diffraction, and Raman spectroscopic study of malayaite, CaSnSiO$_5$ American mineralogist 81(5-6), 595 - 602 (1996) [10.2138/am-1996-5-606]   Restricted: PDF PDF (PDFA); 2017-06-2802:47 [PUBDB-2017-06226] Journal Article et al Surface electronic structure of Ge(001)2 × 1: experiment and theory Surface science 236(3), L359 - L364 (1990) [10.1016/0039-6028(90)90464-J]   Detailed studies of the surface electronic structure of Ge(001)2 × 1 have been performed with angle-resolved photoemission. Five surface structures are identified in the spectra and their initial-energy dispersions E(k∥) are presented along the [010] direction. [...] Restricted: PDF PDF (PDFA); 2017-06-2721:09 [PUBDB-2017-06225] Journal Article et al Global properties of pion production in the reaction $\gamma\gamma\to 3\pi^+3\pi^-$ Physics letters / B 245(2), 298 - 304 (1990) [10.1016/0370-2693(90)90149-Z]   We have studied the properties of pion production in the reaction γ→3π+3π− in the energy range 1.6⩽Wγγ⩽7.5 GeV with the CELLO detector at PETRA. We present the topological cross section both for Q2≈0 (anti-tag) and Q2≈0 (single-tag). [...] Restricted: PDF PDF (PDFA); 2017-06-2719:39 [PUBDB-2017-06224] Journal Article et al Limits on electron compositeness from Bhabha scattering The European physical journal / C 51(2), 143 - 148 (1991) [10.1007/BF01475783]   We have studied the reactione+e−→e+e− using data taken by the CELLO detector at 35 GeV centre of mass energy with an integrated luminosity of 86 pb−1. The differential cross section is found to agree with the Standard Model and is used to set limits on possible deviations from the pointlike structure of the electron. [...] Restricted: PDF PDF (PDFA); 2017-06-2719:19 [PUBDB-2017-06223] Journal Article Koetz, U. Degradation of CMOS-integrated electronics under ionizing irradiation Nuclear physics / B / Proceedings supplements 23(1), 319 - 323 (1991) [10.1016/0920-5632(91)90064-L]   In high energy physics collider experiments, particles interact with semiconductor structures of integrated circuits, causing degradation of the physical and electronic characteristics.At the calorimeter of the HERA-experiment ZEUS, at DESY, a fast analog storage device, realized by CMOS integrated electronics was investigated under irradiation conditions higher than those expected in the experiment. Various parameters showed continuous degradation with irradiation. [...] Restricted: PDF PDF (PDFA); 2017-06-2715:36 [PUBDB-2017-06174] Journal Article et al Valence- and inner-shell spectroscopy on rare-gas clusters Surface review and letters 03(01), 299 - 306 (1996) [10.1142/S0218625X96000553]   An overview of the present status of valence- and inner-shell spectroscopy on rare-gas clusters is given. Fluorescence excitation, time-of-flight ion and photoelectron spectroscopy with synchrotron excitation was used to study the electronic level structure of rare-gas clusters. [...] 2017-06-2715:27 [PUBDB-2017-06173] Journal Article et al Structure and correlations in porous silicon studied by X-ray scattering methods Solid state communications 100(1), 13 - 16 (1996) [10.1016/0038-1098(96)00376-6]   The internal structure of p− and p+ doped porous silicon (PS) has been investigated by small-angle X-ray scattering (SAXS) and grazing incidence diffraction (GID) using synchrotron radiation. The silicon morphology in p− doped samples shows a bimodal distribution of small (some nm) and larger (some 10 nm) particle sizes for all porosities investigated. [...] Restricted: PDF PDF (PDFA); 2017-06-2715:24 [PUBDB-2017-06172] Journal Article et al Bimodal size distribution in p$^-$ porous silicon studied by small angle X-ray scattering Thin solid films 276(1-2), 65 - 68 (1996) [10.1016/0040-6090(95)08047-3]   The structure of free-standing films of p-doped porous silicon with different porosities has been investigated by small-angle X-ray scattering using synchrotron radiation. The silicon morphology in the samples shows a bimodal distribution of particle sizes for all porosities investigated: small spherically shaped particles with a diameter of a few nanometers and large cylindrically shaped particles oriented with their axis perpendicular to the surface. [...] Restricted: PDF PDF (PDFA); 2017-06-2715:23 [PUBDB-2017-06171] Journal Article et al A differential anomalous X-ray scattering study of lead(II)acetate trihydrate in 2-methoxyethanol Berichte der Bunsen-Gesellschaft für Physikalische Chemie 100(10), 1706 - 1712 (1996) [10.1002/bbpc.19961001007]   The results of a differential anomalous X-ray scattering (DAS) study on lead(II)acetate trihydrate, dissolved in 2-methoxyethanol, are reported. Anomalous X-ray scattering at two energies below the L3-edge of lead (Pb) was used to determine the local environment of Pb and to get more precise information on the complex molecular structure of the liquid. [...]