Nuclear Medium Effects on Analyzing Power Investigated With a Proton Knockout Reaction

Abstract

DeclarationI, the undersigned, hereby declare that the work contained in this dissertation is my own original work and that I have not previously in its entirety or in part submitted it at any university for a degree. Signature DateStellenbosch University http://scholar.sun.ac.za Abstract Nuclear medium effects on analyzing power investigated with a proton knockout reactionQuasi-free proton scattering provides a direct mechanism to study modifications of the free nucleon-nucleon interaction in the nuclear medium. It is known that due to the density dependence of the nucleon-nucleon interaction, quasi-free proton scattering from light targets ( Eksperimentele kansvlakke toon uitstekende ooreenstemming met VGIB berekeninge, en lewer spektroskopiese faktore op wat goed ooreenstem met resultate van (e, e'p)

The Two-Photon Decay of the 11-/2 Isomer of 137Ba and Mixed-Symmetry States of 92,94Zr and 94Mo

“…Clearly, the ∆ distribution of the correct lookup table is changed because of the additional factor ζ i+1 −ζ i−1 2 − ζ i . It can be shown [Nev01] that this factor changes its sign when going from b-integer(b) < 0.5 to b-integer(b) > 0.5 and thus causes the double peak structure seen in Fig. 7.…”

“…These dependencies can be further corrected offline. The covered momentum range is given by ∆p = p 0 · x D , where p 0 is a reference momentum, x the length of the focal plane and D is the dispersion [Nev01]. Three different dispersion modes are available at the K600: low, medium and high with dispersion values of 6.2 cm/%, 8.4 cm/% and 9.8 cm/%.…”

“…Following the discussion in Ref. [Nev01] one can write for ∆ based on an incorrectly shifted lookup table…”

“…In order to determine the excitation energies of the measured nuclear states one has to calibrate the focal plane in terms of the proton momentum p. It can be shown that the proton momentum is related to the horizontal focal plane position X through a second order polynomial [Nev01] …”