Download or read book Polarization Transfer in the Reaction 44He e E p 3H in the Quasi elastic Scattering Region written by Sonja Dieterich and published by . This book was released on 2002 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polarization Transfer in the Reaction 4He vec v E vec p 3H in the Quasielastic Scattering Region written by and published by . This book was released on 2002 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been a longstanding issue concerning possible nucleon modifications in a (dense) nuclear medium. Polarization transfer data for exclusive quasielastic electron scattering are a sensitive to the ratio of the electric and magnetic nucleon form factors in the medium. Although proper interpretation of the results requires accounting for such effects as final state interactions and meson exchange currents, their effect on polarization transfer is predicted to be small. Studies of model dependencies, e.g., the off-shell current operator and spinor distortions, have been done. Final results of a measurement of polarization transfer in the 4He($\vec{v}$, e'$\vec{p}$)3H reaction will be discussed. The experiments were carried out at MAMI, Mainz at a Q2 of 0.4 GeV2 and at the Thomas Jefferson Lab, Newport News, Virginia at the Q2 values 0.5, 1.0, 1.6 and 2.6 GeV2. Measured values of the transferred and induced polarization are compared with various theoretical calculations. The experiment showed a difference between the fully relativistic model with may indicate medium modifications of the form factor.
Download or read book Polarization Transfer Measurements of the Quasielastic Region on 3He with the right Arrow Above p right Arrow Above n Reaction at 200 MeV written by Georgios Savopulos and published by . This book was released on 1998 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polarization Transfer in the 4He e2 e p2 3H Reaction at Q2 written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, proton recoil polarization was measured in the quasielastic 4He(e→,e'p→)3H reaction at Q2 = 0.8 (GeV/c)2 and 1.3 (GeV/c)2 with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the 1H(e→,e'p→) reaction, contradicting a relativistic distorted-wave approximation, and favoring either the inclusion of medium-modified proton form factors predicted by the quark-meson coupling model or a spin-dependent charge-exchange final-state interaction. For the first time, the polarization-transfer ratio is studied as a function of the virtuality of the proton.
Download or read book Polarization Transfer in 4He e vector E prime p vector 3H written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarization transfer in quasi-elastic nucleon knockout is sensitive to the properties of the nucleon in the nuclear medium, including possible modification of the nucleon form factor and/or spinor. In our recently completed experiment E03-104 at Jefferson Lab we measured the proton recoil polarization in the 4He(e-vector, e[prime]p-vector)3H reaction at a Q2 of 0.8 (GeV/c)2 and 1.3 (GeV/c)2 with unprecedented precision. These data complement earlier data between 0.4 and 2.6 (GeV/c)2 from both Mainz and Jefferson Lab, in which the measured ratio of polarization-transfer coefficients differs from a fully relativistic DWIA calculation. Preliminary results hint at a possible unexpected Q2 dependence in the polarization transfer coefficient ratio. Final analysis will help constrain FSI models.
Download or read book Polarization Transfer in the 4He e u2192 e p u2192 3H Reaction at Q2 written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Here, proton recoil polarization was measured in the quasielastic 4He(e→,e'p→)3H reaction at Q2 = 0.8 (GeV/c)2 and 1.3 (GeV/c)2 with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the 1H(e→,e'p→) reaction, contradicting a relativistic distorted-wave approximation, and favoring either the inclusion of medium-modified proton form factors predicted by the quark-meson coupling model or a spin-dependent charge-exchange final-state interaction. For the first time, the polarization-transfer ratio is studied as a function of the virtuality of the proton.
Download or read book Polarization Transfer in the 4He rvec E E rvec P 3H Reaction written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarization transfer in the 4He({rvec E}, E′{rvec P})3H reaction was measured in Jefferson Lab experiment 93-049. The ratio of the polarization transfer coefficients, (P′x/P′{sub z}){sub He}, is on average significantly reduced as compared to the same ratio in elastic ep scattering. This is so far unaccounted for by relativistic DWIA calculations, and favors the inclusion of a predicted medium modification of the proton form factor.
Download or read book Relativistic Descriptions of Polarization Transfer Observables for Quasielastic Proton Scattering written by Gregory Campbell Hillhouse and published by . This book was released on 1999 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polarization Transfer in the 4He rvec E E rvec P 3H Reaction written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarization transfer in the 4He ({rvec e}, e'{rvec p})3H reaction was measured at Q2 of 0.4 GeV2 at MAMI, Mainz, and at Q2 of 0.5, 1.0, 1.6 and 2.6 GeV2 at the Thomas Jefferson National Accelerator Facility (Jefferson Lab), Newport News. The ratio of transverse to longitudinal polarization components of the ejected proton was compared with the same ratio for 1He({rvec e}, e'{rvec p}). Results at lower Q2 are consistent with a recent relativistic calculation including a predicted medium modification of the proton form factor based on a quark-meson coupling model.
Download or read book Polarization Transfer in Proton deuteron Elastic Scattering written by and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polarization Transfer in The sup 4 He rvec E E prime rvec P sup 3 H Reaction written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarization transfer in the[sup 4]He([rvec E], E[prime][rvec P])[sup 3]H reaction was measured in Jefferson Lab experiment 93-049. The ratio of the polarization transfer coefficients, (P[prime][sub x]/P[prime][sub z])[sub He], is on average significantly reduced as compared to the same ratio in elastic ep scattering. This is so far unaccounted for by relativistic DWIA calculations, and favors the inclusion of a predicted medium modification of the proton form factor.
Download or read book Nanotechnology in Catalysis 3 written by Bing Zhou and published by Springer Science & Business Media. This book was released on 2007-09-05 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume continues the tradition formed in Nanotechnology in Catalysis 1 and 2. As with those books, this one is based upon an ACS symposium. Some of the most illustrious names in heterogeneous catalysis are among the contributors. The book covers: Design, synthesis, and control of catalysts at nanoscale; understanding of catalytic reaction at nanometer scale; characterization of nanomaterials as catalysts; nanoparticle metal or metal oxides catalysts; nanomaterials as catalyst supports; new catalytic applications of nanomaterials.
Download or read book Nanomaterials in Advanced Batteries and Supercapacitors written by Kenneth I. Ozoemena and published by Springer. This book was released on 2016-07-18 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an authoritative source of information on the use of nanomaterials to enhance the performance of existing electrochemical energy storage systems and the manners in which new such systems are being made possible. The book covers the state of the art of the design, preparation, and engineering of nanoscale functional materials as effective catalysts and as electrodes for electrochemical energy storage and mechanistic investigation of electrode reactions. It also provides perspectives and challenges for future research. A related book by the same editors is: Nanomaterials for Fuel Cell Catalysis.
Download or read book Semiconductor Materials for Solar Photovoltaic Cells written by M. Parans Paranthaman and published by Springer. This book was released on 2015-09-16 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the current status of semiconductor materials for conversion of sunlight to electricity, and highlights advances in both basic science and manufacturing. Photovoltaic (PV) solar electric technology will be a significant contributor to world energy supplies when reliable, efficient PV power products are manufactured in large volumes at low cost. Expert chapters cover the full range of semiconductor materials for solar-to-electricity conversion, from crystalline silicon and amorphous silicon to cadmium telluride, copper indium gallium sulfide selenides, dye sensitized solar cells, organic solar cells, and environmentally friendly copper zinc tin sulfide selenides. The latest methods for synthesis and characterization of solar cell materials are described, together with techniques for measuring solar cell efficiency. Semiconductor Materials for Solar Photovoltaic Cells presents the current state of the art as well as key details about future strategies to increase the efficiency and reduce costs, with particular focus on how to reduce the gap between laboratory scale efficiency and commercial module efficiency. This book will aid materials scientists and engineers in identifying research priorities to fulfill energy needs, and will also enable researchers to understand novel semiconductor materials that are emerging in the solar market. This integrated approach also gives science and engineering students a sense of the excitement and relevance of materials science in the development of novel semiconductor materials. · Provides a comprehensive introduction to solar PV cell materials · Reviews current and future status of solar cells with respect to cost and efficiency · Covers the full range of solar cell materials, from silicon and thin films to dye sensitized and organic solar cells · Offers an in-depth account of the semiconductor material strategies and directions for further research · Features detailed tables on the world leaders in efficiency demonstrations · Edited by scientists with experience in both research and industry
Download or read book Rechargeable Batteries written by Zhengcheng Zhang and published by Springer. This book was released on 2015-06-24 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book updates the latest advancements in new chemistries, novel materials and system integration of rechargeable batteries, including lithium-ion batteries and batteries beyond lithium-ion and addresses where the research is advancing in the near future in a brief and concise manner. The book is intended for a wide range of readers from undergraduates, postgraduates to senior scientists and engineers. In order to update the latest status of rechargeable batteries and predict near research trend, we plan to invite the world leading researchers who are presently working in the field to write each chapter of the book. The book covers not only lithium-ion batteries but also other batteries beyond lithium-ion, such as lithium-air, lithium-sulfur, sodium-ion, sodium-sulfur, magnesium-ion and liquid flow batteries.
Download or read book Nanocomposite Materials written by Jyotishkumar Parameswaranpillai and published by CRC Press. This book was released on 2016-09-19 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive collection of the latest information on nanomaterials and nanocomposites. It covers material synthesis, processing, structure characterization, properties and applications. It presents a coherent treatment of how composite properties depend on nanostructure, and covers cutting-edge topics like bionanocomposites for sustainable development. This book summarizes many developments in the field making it an ideal resource for researchers from industry, academia, government and private research institutions.
Download or read book The Atmosphere and Ionosphere written by Vladimir Bychkov and published by Springer Science & Business Media. This book was released on 2010-07-17 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: From July 7 to 12, 2008 in Zelenogradsk, a cosy resort on the bank of the Baltic Sea near Kaliningrad in Russia, the 1st International Conference “Atmosphere, Ionosphere, Safety (AIS-2008)” has been carried out. The State Russian University of I. Kant, Semenov Institute of chemical physics of the Russian Academy of Sciences, Pushkov Institute of terrestrial magnetism and radio-waves propagation of the Russian Academy of Sciences, and Russian Committee on Ball Lightning (BL) have acted as organizers of the conference. Financial support was made by Russian Fund of Fundamental Research Project N. 08-03-06041 and European Of?ce of Aerospace Research and Development Grant award FA8655-08-1-5052. The International conference “Atmosphere, Ionosphere, Safety” (AIS-2008) was devoted to (i) the analysis of the atmosphere–ionosphere response on natural and man-made processes, the reasons of occurrence of the various accompanying geophysical phenomena, and an estimation of possible consequences of their in?uence on the person and technological systems; (ii) the study of the monitoring possibility and search of the ways for the risk level decrease. Discussion of the physical and chemical processes accompanying the observable geophysical p- nomena was undertaken. One can see from a list of the Conference sections that questions of safety took only rather modest place, so main topics of the Conference became discussion of processes taking place in the atmosphere, ionosphere and methods of monitoring these processes.
