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Nuclear Physics Seminars

ics Nuclear
Wednesday, June 23, 2004
3:30 PM
Physics Building, Room 204
Note special date.
Shigeyuki Tajima [Host: Donal Day]
Duke University
"Measurements of the Electric Form Factor of the Neutron"
Precise measurements of the electric form factor of the neutron, Gen, over a wide range of the square of the four-momentum transfer, Q^2, are important for understanding nucleon and nuclear electromagnetic structure. The Jefferson Laboratory E93-038 collaboration recently reported the first measurements of Gen using polarization techniques at Q^2 > 1 (GeV/c)^2. The collaboration measured the ratio of the electric form factor to magnetic form factors of the neutron, g = Gen/Gmn, at three Q^2 values (0.45, 1.13 and 1.45 (GeV/c)^2) using the quasi-elastic 2H(vec e,e'vec n)1H reaction. The value for g was determined from the measured ratio of the sideways and longitudinal components of the neutron polarization vector. A polarimeter based on np scattering was used to analyze the polarization of the recoil neutrons. In this talk, the data analyses and our results for g and Gen at Q^2=0.45 and 1.13 (GeV/c)^2 will be given.

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