Jefferson Lab Experiment E91-013
Nuclear Transparency and the A(e,e'p) Reaction Mechansim.
Experiment Overview: Poster
- 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.
- 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)
- Related experiments
- JLab E02-110 - Q^2 Dependence of Nuclear Transparency for Incoherent rho Electroproduction
- JLab E01-107 - Measurement of Pion Transparency in Nuclei:
- JLab E94-139 - Nuclear transparency at high Q^2
- SLAC NE-18
This page is maintained by David Potterveld (potterveld 'at' anl.gov
It was last updated May 18, 2001