A Measurement of Inclusive Quasi-elastic Electron Scattering Cross Sections at High Momentum Transfer PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Measurement of Inclusive Quasi-elastic Electron Scattering Cross Sections at High Momentum Transfer PDF full book. Access full book title A Measurement of Inclusive Quasi-elastic Electron Scattering Cross Sections at High Momentum Transfer by David Henry Potterveld. Download full books in PDF and EPUB format.
Author: David Henry Potterveld
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
Get Book Here
Book Description
Author: David Henry Potterveld
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
Get Book Here
Book Description
![A Measurement of Inclusive Quasielastic Electron Cross Sections at X] 1 and High Q2 PDF](https://books.google.com/books/content/images/frontcover/Nv7djwEACAAJ?fife=w80-h100)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
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 (x{sub Bj}> 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(psi). For both the data is found to be independent of the momentum transfer (scaling of the first kind). For f(psi) the data is in addition independent of the mass number A (scaling of the second kind) and thus exhibits superscaling properties.
Author: Huan Yao
Publisher:
ISBN:
Category :
Languages : en
Pages : 169
Get Book Here
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:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
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-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
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
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: Hamza Atac
Publisher:
ISBN:
Category :
Languages : en
Pages : 184
Get Book Here
Book Description
The Coulomb Sum is defined by the quasi-elastic nucleon knock-out process and it is the integration of the longitudinal response function over the energy loss of the incident electron. The Coulomb sum goes to the total charge at large q. The existing measurements of the Coulomb Sum Rule show disagreement with the theoretical calculations for the medium and heavy nuclei. To find the reason behind the disagreement might answer the question of whether the properties of the nucleons are affected by the nuclear medium or not. In order to determine the Coulomb Sum in nuclei, a precision measurement of inclusive electron scattering in the quasi-elastic region was performed at the Thomas Jefferson National Accelerator Facility. Incident electrons with energies ranging from 0:4 GeV to 4 GeV scattered off 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 Born cross sections were extracted for the Left High Resolution Spectrometer (LHRS) and the Right High Resolution Spectrometer 56Fe data. The Rosenbluth separation was performed to extract the transverse and longitudinal response functions at 650 MeV three-momentum transfer. The preliminary results of the longitudinal and transverse functions were extracted for 56Fe target at 650 MeV three-momentum transfer.
Author: Thomas Claude Petitjean
Publisher:
ISBN:
Category :
Languages : en
Pages : 78
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
Get Book Here
Book Description
With high electron energies a kinematic regime can be reached where it will be possible to separate quasielastic and deep inelastic scattering. We present a short description of these processes which dominate the inclusive spectrum. Using the highest momentum transfer data available to guide our estimates, we give the kinematic requirements and the cross sections expected. These results indicate that inclusive scattering at high q has a yet unfilled potential. 18 refs., 13 figs.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
The impulse approximation (IA) predicts that momentum distributions, n/sub k/, in many-body systems should be measurable by inclusive quasielastic scattering at high energy and momentum (w, Q) transfer. The observations that the cross section appears to satisfy ''Y-scaling'' (i.e., is a function not of both w and Q of a single variable, Y) is usually taken as a signature of the IA. In nuclear physics, inelastic electron scattering at GeV energies should reveal the high momentum components of the nuclear wave function. In quantum fluids, neutron scattering at hundreds of MeV energies should measure the Bose condensate in superfluid 4He and the Fermi surface discontinuity and depletion of the Fermi sea in 3He. In molecular and condensed matter systems, X-ray Compton scattering at keV energies reveals electronic n/sub k/. Such experiments test many-body wave functions calculated by methods such as Green Function and Path Integral Monte Carlo, and Fermi Hypernetted Chain. However, an outstanding issue has been the corrections to the IA due to the scattering of the recoiling particle from neighboring particles, which are termed ''final state effects'' (FSE). The FSE should be especially important in nuclei and quantum fluids where the potentials have steeply repulsive cores. While there have been a variety of theories proposed for FSE, until now none has been adequately tested by experiment. Recently, the ''hard core perturbation theory'' (HCPT) for FSE in quantum fluids by Silver has been successfully compared to new neutron scattering measurements on 4He by P.E. Sokol and colleagues. In this paper, we shall discuss the lessons of this success for the extraction of n/sub k/ in nuclei by inclusive ''quasielastic electron-nucleus scattering'' (QENS). 19 refs., 12 figs.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Inclusive electron scattering is measured with 4.045 GeV incident beam energy from C, Fe, and Au targets. The measured energy transfers and angles correspond to a kinematic range for Bjorken x>1 and momentum transfers from Q2 = 1-7 (GeV/c)2. When analyzed in terms of the y-scaling function the data show for the first time an approach to scaling for values of the initial nucleon momenta significantly greater than the nuclear matter Fermi momentum (i.e.,>0.3 GeV/c).
