Study of quasielastic 1p-shell proton knockout in the oxygen-16
Abstract
Coincidence cross sections and the structure functions R L+TT, RT and RLT have been obtained for the quasielastic 16O(e, e'p) reaction with the proton knocked out from the 1p1/2 and 1p 3/2 states in perpendicular kinematics. The nominal energy transfer ω was 439 MeV, the nominal Q2 was 0.8 (GeV/c) 2 and the kinetic energy of knocked-out proton was 427 MeV. The data was taken in Hall A, Jefferson Laboratory, using two high resolution spectrometers to detect electrons and protons respectively. Nominal beam energies 845 MeV, 1645 MeV, and 2445 MeV were employed. For each beam energy, the momentum and angle of electron arm were fixed, while the angle between the proton momentum and the momentum transfer q-> was varied to map out the missing momentum. RLT was separated out to ~350 MeV/c in missing momentum. RL+TT and RT were separated out to ~280 MeV/c in missing momentum. RL and R T were separated at a missing momentum of 52.5 MeV/c for the data taken with hadron arm along q-> . The measured cross sections and response functions agree with both relativistic and non-relativistic DWIA calculations employing spectroscopic factors between 60-75% for 1p1/2 and 1p 3/2 states. The left-right asymmetry does not support the nonrelativistic DWIA calculation using the Weyl gauge. Also, the left-right asymmetry measurement favors the relativistic calculation. This thesis describes the details of the experimental setup, the calibration of the spectrometers, the techniques used in the data analysis to derive the final cross sections as well as the response functions, and the comparison of the results with the theoretical calculations. (Copies available exclusively from MIT Libraries, Rm. 14-0551, Cambridge, MA 02139-4307. Ph. 617-253-5668; Fax 617-253-1690.)
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1999
- Bibcode:
- 1999PhDT........48G
- Keywords:
-
- e;
- e'p) reaction at Q(2) = 0.8 (GeV/c)(2;
- Physics: Nuclear, Physics: Elementary Particles and High Energy