As with the data, the data taken at was binned by 10 MeV in order to get the acceptable statistics. The spin-observable results for the normally polarized incident beam for the and reactions are given in tables and , respectively.
Table: Spin-observable results from the
reaction at
for an polarized proton beam with MeV.
Table: Spin-observable results from the
reaction at
for an polarized proton beam with MeV.
The results at are also presented in figure . As with the data, the analyzing power and induced polarization seem to agree with the results of the Faddeev calculations [Wit96], and the data and data track with each other. The measured value of for does not agree with calculations near the quasifree peak, as with the data, but is consistent with expectations in the tail region.
Figure: Spin-observable results from the
and
reactions at
for an polarized proton beam with MeV. The
excitation spectra are shown at the top. The dashed line show the results
of Faddeev calculations of the spin-observables for the deuterium
reaction. The vertical dotted line indicate the energy loss for free np
scattering.
The results for the sideways and longitudinal incident beams for the reaction at a scattering angle of are compiled in tables and , respectively. Similarly, the spin-observables from the are shown in tables and for the sideways and longitudinally polarized beams, respectively.
Table: Spin-observable results from the
reaction at
for an polarized proton beam with MeV.
Table: Spin-observable results from the
reaction at
for an polarized proton beam with MeV.
Table: Spin-observable results from the
reaction at
for an polarized proton beam with MeV.
Table: Spin-observable results from the
reaction at
for an polarized proton beam with MeV.
The results from the sideways and longitudinal data are also shown in figures and , respectively. The diagonal in-plane spin-observables seem to deviate slightly from the Faddeev calculation in both the quasifree peak and far out in the tail, but generally seem to agree. As for the off diagonal terms, for the takes on the opposite sign from both the Faddeev results and the results, but the magnitude is small.
Figure: Spin-observable results from the
and
reactions at
for an polarized proton beam with MeV. The
excitation spectra are shown at the top. The dashed line show the results
of Faddeev calculations of the spin-observables for the deuterium
reaction. The vertical dotted line indicate the energy loss for free np
scattering.
Figure: Spin-observable results from the
and
reactions at
for an polarized proton beam with MeV. The
excitation spectra are shown at the top. The dashed line show the results
of Faddeev calculations of the spin-observables for the deuterium
reaction. The vertical dotted line indicate the energy loss for free np
scattering.
The center-of-mass spin observables, 's, are shown in figures and . These results are also compared to the results of Faddeev calculations (shown with the short-dashed line) and to free np scattering results (shown with the long-dashed line) from calculations based on the Argonne potential [WSA84].
Figure: (spin 0) and (spin transverse,
)
spin observables as a function of energy loss at
.
Results from both deuterium and carbon are shown. The short-dashed line
are the results of Faddeev calculations of the deuterium spin observables.
The long-dashed line are the free np scattering results for the Argonne
potential.
The vertical dotted line indicates the energy loss for free np scattering.
Figure: (spin longitudinal, ) and
(spin transverse, )
spin observables as a function of energy loss at .
Results from both deuterium and carbon are shown. The short-dashed line
are the results of Faddeev calculations of the deuterium spin observables.
The long-dashed line are the free np scattering results for the
Argonne potential.
The vertical dotted line indicates the energy loss for free np scattering.
Interestingly enough, at the scattering angle the center-of-mass spin observables, 's, for deuterium and carbon are quite similar. This is interesting primarily because in the past the deuterium response was treated as the free response [Che93] [Lut93] [Tad94] and used to divide out the supposed free scattering pieces from the responses of heavier targets, such as , to look for nuclear medium effects. Therefore, the ratio of longitudinal to transverse responses had been given by
Figures and also show (dashed line) the calculated values for np scattering based on the Argonne potential [WSA84] and to some extent the deuterium results agree with the carbon results more than they do with the calculated free values or the Faddeev calculations. The exception to this is , especially at high loss, which may indicate interesting physics in the longitudinal channel. The Argonne model was chosen because it is the basis for both the Faddeev calculations [Wit96] and the Green's function Monte Carlo calculations [Pan94] to which these data are being compared. Other models were investigated (i.e. Nijmegan, Bonn, etc.) but no significant difference was shown. That the and data agree this closely may indicate the onset of nuclear medium effects even in the small nucleus of deuterium as postulated in [Pan94].