Study of Quasielastic 1p-shell proton Knockout in the ¹⁶O (e,e'p) reaction at Q²=0.8 (GeV/c)²

Abstract

Coincidence cross sections and the structure functions R L+T T R T and R LT have been obtained for the quasielastic 16 O(e e 0 p) reaction with the proton knocked out from the 1p 1=2 and 1p 3=2 states in perpendicular kinematics. The nominal energy transfer ! was 439 MeV, the nominal Q 2 was 0.8 (GeV/c) 2 and the kinetic energy of knocked-out proton was 427 MeV. The data was taken in Hall A, Je erson Laboratory, using two high resolution spectrometers to detect electrons and protons respectively. Nominal beamenergies 845 MeV, 1645 MeV, and 2445 MeV were employed. For each beam energy, the momentum and angle of electron arm were xed, while the angle between the proton momentum and the momentum transferq was varied to map out the missing momentum. R LT was separated out to 350 MeV/c in missing momentum. R L+T T and R T were separated out to 280 MeV/c in missing momentum. R L and R T were separated at a missing momentum of 52.5 MeV/c for the data taken with hadron arm alongq.The measured cross sections and response functions agree with both relativistic and non-relativistic DWIA calculations employing spectroscopic factors between 60-75% for 1p 1=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 nal cross sections as well as the response functions, and the comparison of the results with the theoretical calculations.