Quasi-elastic proton knockout from {sup 16}O

Journal Article · Wed Sep 01 04:00:00 EDT 1999

OSTI ID:754420

Jager, K de

In Hall A at Jefferson Lab, the authors have measured cross sections for quasi-elastic proton knockout in the {sup 16}O (e, e{prime}p) reaction at {omega} = 0.44 GeV and Q{sup 2} = 0.8 (GeV/c){sup 2} for missing momenta, p{sub m}, up to 355 MeV/c. They have extracted the response function R{sub L+TT}, R{sub T}, R{sub LT}, and the left-right asymmetry A{sub LT} for E{sub m} < 60 MeV. In contrast to some previous measurements at lower Q{sup 2}, their data for the valence states are well described by relativistic DWIA calculations. In the continuum, the cross sections and response functions, for missing energies below 50 MeV and missing momenta below 150 MeV/c, are mostly accounted for by s-shell single-particle knockout calculations. R{sub L} becomes small for missing energies higher than 50 MeV, while R{sub T} remains substantial, suggesting the onset of non-single particle interactions. At p{sub m} {approx} 280 MeV/c, R{sub L} is consistent with zero and with theory, whereas the cross section, R{sub T} and R{sub LT} are much larger than the single-particle knockout calculations.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 754420
• Report Number(s): DOE/ER/40150-1376; JLAB-PHY-99-21
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
CEBAF ACCELERATOR
ELECTRON REACTIONS
FOUR MOMENTUM TRANSFER
KNOCK-OUT REACTIONS
NUCLEAR STRUCTURE
OXYGEN 16 TARGET
PROTON
PROTONS
QUASI-ELASTIC SCATTERING
RESPONSE FUNCTIONS
SPECTROSCOPY