Jefferson Lab Experiment E91-013

• Spokesperson: Donald Geesaman, Argonne National Lab
• 88 Collaborators from 24 institutions
  
• Two thesis students: Derek vanWestrum (University of Colorado, 1998) and Dipangkar Dutta (Northwestern University, 1999)
• First completed experiment in Hall C of Jefferson Lab (Spring 1996)
• Experiment E91013 measured the A(e,e'p) reaction on C, Fe and Au targets. In this experiment a continuous electron beam from the CEBAF accelerator was incident on a target nucleus, the incident electrons scattered off individual protons in the nucleus knocking them out of the nucleus in the process. The scattered electrons and knocked out protons were then detected in coincidence using the two magnetic spectrometers (HMS and SOS) in experimental Hall C. These measurements were used to extract the fraction of the protons which were able to make it out the nucleus without further interactions (also known as transparency) and to extract the spectral functions of the three target nuclei. Spectral functions are the probability of finding a nucleon with given energy and momentum in the nucleus. In addition at two energies within the range of the measurement a Rosenbluth separation was performed to extract the longitudinal and transverse components of the spectral function.

Contents

• Collaboration
• Collaboration list

• Publication
• Quasifree (e,e'p) Reactions and Proton Propagation in Nuclei - D. Abbott, et al., Phys. Rev. Lett. 80, 5072 (1998)
• Separated Spectral Functions for the Quasifree C(e,e'p) Reaction  - D. Dutta, et al., Phys. Rev. C61, 061602 (2000)
• A Study of the Quasi-elastic (e,e'p) Reaction on 12C, 56Fe, and 97Au - D. Dutta, et al., Phys. Rev. C68, 064603 (2003)

• Theses
• Quasielastic (e,e'p) Reactions and Proton Propagation Throught Nuclei,  Derek vanWestrum, University of Colorado (1998)
• The (e,e'p) Reaction Mechanism in the Quasi-Elastic Region,  Dipangkar Dutta, Northwestern University (1999)

• Proposal
• Experiment Summary
• Full text

• Related experiments
• JLab E02-110 - Q^2 Dependence of Nuclear Transparency for Incoherent rho Electroproduction
• K. Hafidi, M. Holtrop, and B. Mustapha, spokespersons: Full Proposal -- One-page Summary -- Experiment Homepage
• JLab E01-107 - Measurement of Pion Transparency in Nuclei:
• D. Dutta, R. Ent, and K. Garrow, spokespersons: Full Proposal -- One-page Summary
• JLab E94-139 - Nuclear transparency at high Q^2
• Nuclear transparency from quasielastic A(e,e'p) reactions up to Q^2=8.1 GeV^2: K. Garrow, et al., Phys. Rev. C66, 044613 (2002)
• SLAC NE-18
• Momentum Transfer Dependence of Nuclear Transparency from the Quasielastic 12C(e,e'p) Reaction: N. C. Makins, et al., Phys. Rev. Lett. 72, 1986 (1994)
• A-dependence of nuclear transparency in quasielastic A(e,e'p) at high Q^2: T. G. O'Neill, et al., Phys. Lett. B351, 87 (1995)

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It was last updated May 18, 2001