Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268

Fri., May 21, 2004, at 10:30 a.m.

Measurements of the Electric Form Factor of the Neutron at Q2=0.45 and 1.13 (GeV/c)2

Shigeyuki Tajima, Duke University
6008 Conference Room

Precise measurements of the electric form factor of the neutron, Gen, over a wide range of the square of the four-momentum transfer, Q2, 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 Q2 > 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 Q2 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 Q2=0.45 and 1.13 (GeV/c)2 will be given.

Contact: Vince Cianciolo