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Title: Short Range Correlations in Nuclei at Large xbj through Inclusive Quasi-Elastic Electron Scattering

Abstract

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

Authors:
 [1]
  1. Univ. of Virginia, Charlottesville, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1168669
Report Number(s):
JLAB-PHY-13-1830; DOE/OR/23177-2974
DOE Contract Number:
AC05-06OR23177
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Ye, Zhihong. Short Range Correlations in Nuclei at Large xbj through Inclusive Quasi-Elastic Electron Scattering. United States: N. p., 2013. Web. doi:10.2172/1168669.
Ye, Zhihong. Short Range Correlations in Nuclei at Large xbj through Inclusive Quasi-Elastic Electron Scattering. United States. doi:10.2172/1168669.
Ye, Zhihong. Sun . "Short Range Correlations in Nuclei at Large xbj through Inclusive Quasi-Elastic Electron Scattering". United States. doi:10.2172/1168669. https://www.osti.gov/servlets/purl/1168669.
@article{osti_1168669,
title = {Short Range Correlations in Nuclei at Large xbj through Inclusive Quasi-Elastic Electron Scattering},
author = {Ye, Zhihong},
abstractNote = {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},
doi = {10.2172/1168669},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 2013},
month = {Sun Dec 01 00:00:00 EST 2013}
}

Thesis/Dissertation:
Other availability
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  • The author has measured inclusive electron-scattering cross sections for targets of {sup 4}He, C, Al, Fe, and Au, for kinematics spanning the quasi-elastic peak, with squared, four-momentum transfer (q{sup 2}) between 0.23 and 2.89 (GeV/c){sup 2}. Additional data were measured for Fe with q{sup 2}'s up to 3.69 (GeV/c){sup 2}. These cross sections were analyzed for the y-scaling behavior expected from a simple, impulse-approximation model, and are found to approach a scaling limit at the highest q{sup 2}'s. The q{sup 2} approach to scaling is compared with a calculation for infinite nuclear matter, and relationships between the scaling function andmore » nucleon momentum distributions are discussed. Deviations from perfect scaling are used to set limits on possible changes in the size of nucleons inside the nucleus.« less
  • 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 νW A 2 and its behavior in x and the Nachtmann variable ξ. The data show approximate scaling of νW Amore » 2 in ξ 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 <0), where some scaling violations arising from FSIs are observed.« less
  • The formalism for quasi-elastic photo-production of pions in the nucleus is derived in the distorted wave impulse approximations and the theoretical spectra of the reaction are shown for the incident photon energies of 250, 300, and 400 MeV and for the pion scattering angles of 45, 90, and 135/sup 0/. The effects of nuclear binding and distortion of the nucleon wave function are considered with the energy-dependent potential of De Forest. These effects broaden the spacing of energy levels and decrease the magnitude of the nucleon wave function. The final state interaction of the pions with the nucleus is describedmore » with an optical model potential, in which the dominant (3,3) resonant amplitude is taken to be that of the free pion-nucleon amplitude or that of a nuclear matter amplitude decreased by collisional broadening. The cross sections with these two amplitudes are compared for the incident proton energy of 250 MeV. It is concluded that the quasi-elastic spectrum of photo-pion production is suppressed by absorption of pions in the nucleus, distortion of the nucleon wave function in an energy-dependent potential, and the Pauli principle for the low energy transfer.« less
  • Absolute elastic differential scattering cross sections (DCS) for electron impact on CO, N{sub 2}, and CO{sub 2} in the energy range 20-100 eV and angular range 20{degree}-120{degree} were measured. A crossed beam scattering geometry was employed and the results were obtained using a relative flow technique in which the DCS of CO and CO{sub 2} were compared directly to the DCS of helium at each angle and energy and the DCS of N{sub 2} was compared directly to the DCS of CO. The results of the elastic DCS of neon are also presented as a check on the experimental procedure.more » Differential cross section measurements for excitation of the electronic features of CO by electron impact have been carried out by JPL group. These data have been analyzed and differential cross sections were obtained for the impact energies 12.5 eV and 15.0 eV by using a computer unfolding program that employees flux corrected Franck-Condon factors and calibration scheme developed jointly with the JPL group. Details of the routine for extracting the DCS are presented. Absolute total scattering cross section measurements were carried out for electron impact on Kr, O{sub 2}, and CO. The results were obtained using a linear attenuation technique in the 5-300 eV incident energy range. The present results have an assigned error of 3% and generally found to be in good agreement with other experimental data.« less