Precision Measurement of Longitudinal and Transverse Response Functions of Quasi-Elastic Electron Scattering in the Momentum Transfer Range 0.55 GeV /c ≤ |q| ≤ 1.0 GeV /c PDF Download
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Author: Huan Yao
Publisher:
ISBN:
Category :
Languages : en
Pages : 169
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Book Description
Coulomb Sum Rule states that the integration of the longitudinal response of a nucleus over the range of energy excitation dominated by quasi-elastic proton knock-out process should be equal to the total number of protons in the nucleus. The test of Coulomb Sum Rule will shed light on the question of whether or not the properties of nucleon are modified in the nuclear medium. In order to test the Coulomb Sum Rule in nuclei, a precision measurement of inclusive electron scattering cross sections in the quasi-elastic region was performed at Jefferson Lab. Incident electrons with energies ranging from 0.4 GeV to 4 GeV scattered from 4He, 12C, 56Fe and 208Pb nuclei at four scattering angles ( 15°, 60°, 90°, 120°) and scattered energies ranging from 0.1 GeV to 4 GeV. The Rosenbluth method with proper coulomb corrections is used to extract the transverse and longitudinal response functions at three-momentum transfers in the range 0.55 GeV/c ≤ |q| ≤ 1.0 GeV/c. The Coulomb Sum Rule is determined in the same |q| range and compared to predictions. This work is supported by the Department Of Energy through grant DE-FG02-94ER40844.
Author: Huan Yao
Publisher:
ISBN:
Category :
Languages : en
Pages : 169
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Book Description
Coulomb Sum Rule states that the integration of the longitudinal response of a nucleus over the range of energy excitation dominated by quasi-elastic proton knock-out process should be equal to the total number of protons in the nucleus. The test of Coulomb Sum Rule will shed light on the question of whether or not the properties of nucleon are modified in the nuclear medium. In order to test the Coulomb Sum Rule in nuclei, a precision measurement of inclusive electron scattering cross sections in the quasi-elastic region was performed at Jefferson Lab. Incident electrons with energies ranging from 0.4 GeV to 4 GeV scattered from 4He, 12C, 56Fe and 208Pb nuclei at four scattering angles ( 15°, 60°, 90°, 120°) and scattered energies ranging from 0.1 GeV to 4 GeV. The Rosenbluth method with proper coulomb corrections is used to extract the transverse and longitudinal response functions at three-momentum transfers in the range 0.55 GeV/c ≤ |q| ≤ 1.0 GeV/c. The Coulomb Sum Rule is determined in the same |q| range and compared to predictions. This work is supported by the Department Of Energy through grant DE-FG02-94ER40844.
Author:
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ISBN:
Category : Nuclear physics
Languages : en
Pages : 336
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Book Description
![Inclusive Electron-Nucleus Scattering at X] 1 and High Momentum Transfer PDF](https://books.google.com/books/content/images/frontcover/lpRFAQAACAAJ?fife=w80-h100)
Author: Donal Day
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ISBN:
Category :
Languages : en
Pages :
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We will present results from a recently completed experiment (E02-019) at Jefferson Lab in which 6 GeV electrons were scattered from a series of both light and heavy nuclei at high momentum transfers. The scattered electrons were detected in the High Momentum Spectrometer in Hall C at angles between 18 and 50 degrees and with momenta between 2 and 5 GeV. This experiment extends the kinematic coverage of inclusive electron-nucleus scattering at high momentum transfer to large Bjorken x, forbidden for the free nucleon. These new data present the opportunity to the investigate the transition from a regime where the cross sections are dominated by quasielastic scattering and where nucleon degrees of freedom hold sway, to one where the reaction is deep inelastic in nature and described by the more fundamental quarks and gluons. A brief description of the experiment will be followed by a presentation of the preliminary data along with a discussion of the scaling behavior of the data.
Author:
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ISBN:
Category :
Languages : en
Pages : 208
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Book Description
The experiment, E08-014, in Hall-A at Jefferson Lab aims to study the short-range correlations (SRC) which are necessary to explain the nuclear strength absent in the mean field theory. The cross sections for 2H, 3He, 4He, 12C, 40Ca and 48Ca, were measured via inclusive quasi-elastic electron scattering from these nuclei in a Q2 range between 0.8 and 2.8 (GeV/c)2 for x>1. The cross section ratios of heavy nuclei to 2H were extracted to study two-nucleon SRC for 1.
Author:
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ISBN:
Category : Physics
Languages : en
Pages : 1156
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Author: Herbert Uberall
Publisher: Academic Press
ISBN: 0323148123
Category : Science
Languages : en
Pages : 496
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Book Description
Electron Scattering from Complex Nuclei, Part A covers the historical phases of experimental development in elastic and inelastic electron scattering. This five-chapter text presents the logical development of the underlying theory of electron scattering. After briefly discussing the history of electron scattering from nuclei, this book goes on describing the theory of elastic scattering from a point nucleus, both with Born approximation and the accurate solution of the Dirac equation, as well as the corresponding experiments. The following chapter considers the analysis of nuclear charge distributions experiments using Born cross section and phase-shift methods. A chapter is devoted to the complete elastic and inelastic Born theory. This chapter also deals with the derivation of a theorem on the general form of the electron-nucleus scattering cross section, with an emphasis on the influence of the neglected transverse interaction on the cross section. The last chapter presents the status of elastic scattering along with some topics in muonic atoms that also determine nuclear charge densities. This book will be of great benefit to physicists, researchers, and graduate students who are interested in nuclear structure problems.
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Category :
Languages : en
Pages :
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Experiment E02-019, performed in Hall C at the Thomas Jefferson National Accelerator Facility (TJNAF), was a measurement of inclusive electron cross sections for several nuclei (2H,3He, 4He, 9Be,12C, 63Cu, and 197Au) in the quasielastic region at high momentum transfer. In the region of low energy transfer, the cross sections were analyzed in terms of the reduced response, F(y), by examining its y-scaling behavior. The data were also examined in terms of the nuclear structure function [nu]WA 2 and its behavior in x and the Nachtmann variable [xi]. The data show approximate scaling of [nu]WA 2 in [xi] for all targets at all kinematics, unlike scaling in x, which is confined to the DIS regime. However, y-scaling observations are limited to the kinematic region dominated by the quasielastic response (y
![Inclusive Electron Scattering From Nuclei at X]1 and High Q^2 PDF](https://books.google.com/books/content/images/frontcover/Mia0DAEACAAJ?fife=w80-h100)
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Category :
Languages : en
Pages :
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CEBAF experiment e89-008 measured inclusive electron scattering from nuclei in a Q2 range between 0.8 and 7.3 (GeV/c)2 for x{sub Bjorken} approximately greater than 1. The cross sections for scattering from D C, Fe, and Au were measured. The C, Fe, and Au data have been analyzed in terms of F(y) to examine y-scaling of the quasielastic scattering, and to study the momentum distribution of the nucleons in the nucleus. The data have also been analyzed in terms of the structure function vW2 to examine scaling of the inelastic scattering in x and xi and to study the momentum distribution of the quarks. In the regions where quasielastic scattering dominates the cross section (low Q2 or large negative values of y), the data are shown to exhibit y-scaling. However, the y-scaling breaks down once the inelastic contributions become large. The data do not exhibit x-scaling, except at the lowest values of x, while the structure function does appear to scale in the Nachtmann variable, xi.
Author:
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ISBN:
Category :
Languages : en
Pages : 92
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Book Description
Experiment E89-008 measured inclusive electron scattering cross sections from different nuclei in Hall C at Jefferson Laboratory. Cross sections on the low energy loss side of the quasi-elastic peak (xBj > 1) are extracted for carbon, aluminum, iron and gold. The data cover four-momentum transfers squared of 0.97 to 5.73 GeV 2 =c 2 . The measured cross sections are compared to cross sections calculated using a microscopic spectral function. The cross section results are also analyzed in terms of the two scaling functions F (y) and f(?'). For both the data is found to be independent of the momentum transfer (scaling of the first kind). For f(?') the data is in addition independent of the mass number A (scaling of the second kind) and thus exhibits superscaling properties.
Author: Francis A. Cucinotta
Publisher:
ISBN:
Category : Collisions (Nuclear physics)
Languages : en
Pages : 28
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