Several different groups have attempted, by various means, to explain
the failure of
the theory to describe the experimental data. One group
[Ich89] extends the calculations of Alberico, * et al.*
[AEM82] by
adding distortions of the trajectory and spin orientation in the nuclear
potential to the incident and ejected nucleon wave-functions. Another
method [HoP93] [HiD94] used the plane wave approximation (no
distortions) but incorporates relativistic effects by treating the nucleons
as full Dirac particles. Yet another explanation [BrR91] [BrW94]
comes from the possible rescaling of the meson mass inside the
nuclear medium, which would mask the enhancement of the spin-longitudinal
to spin-transverse ratio. Each of these explanations will be described in
more detail in chapter . The attempt to gather further
experimental data
to evaluate these theories is the primary motivation behind the measurement
of polarization observables in C presented in this thesis.

Even more recently Pandharipande * et al.* made a set of ``exact''
calculations
of the spin responses of light nuclei (H, He, and He) using a
variational Green's Function
Monte Carlo technique [Pan94]. This method allowed the calculation of
the spin responses without using the random phase approximation used in the
original calculations by Alberico * et al.* [AEM82] and in the
methods described in
the preceding paragraph. The results of these calculations predict an
enhancement, but it is pushed to higher energy loss than previously
thought. This method will also be described in more detail in chapter
.
These calculations, using conventional nuclear potentials, predict a
measurable enhancement even in
H and significant enhancements in He and He. This is the
primary motivation behind the measurement of the polarization observables in
H reported on in this thesis.

Chapter will present the theoretical background for the various predictions made of the nuclear responses in quasifree scattering. Chapter will introduce the theoretical formalism in which the data for the current experiment will be presented and discussed. Chapter will detail the experimental apparatus used to make the measurements and Chapter will present the methods used for reducing the raw data to the desired polarization observables and nuclear responses. In Chapter the results of the experiments will be presented including a comparison of the data with theoretical models. Chapter will summarize the conclusions from the experiment.

Tue Apr 1 08:52:10 EST 1997