[Frost] fermi momentum

[Eugene Pasyuk]

An extreme case of nucleon knockout is a complete break up of the 
nucleus. In that case, we need full binding energy, which in case of 12C 
is 92 MeV, for 16O it is about 128 MeV and for 4He about 30 MeV

-Eugene

Michael Dugger wrote, On 08/16/12 17:58:
>
> Hi,
>
> I made a plot that is similar to what I showed at the meeting today. The only
> difference is that I have included fermi momentum smearing. I used the fermi
> momentum to be 250 MeV and allowed the initial proton momentum to be smeared
> from 0.0 up to the fermi momentum, isotropic in space.
>
> The plot can be found at
> http://www.jlab.org/Hall-B/secure/g9/ASU/fSmear.gif
>
> The x-axis is massX squared and the colors are as such
> Black  -> separation energy = 12 MeV
> Red    -> separation energy = 16 MeV
> Green  -> separation energy = 50 MeV
> Blue   -> separation energy = 100 MeV
> Yellow -> separation energy = 200 MeV
> Pink   -> separation energy = 300 MeV
>
> In the region that we call unphysical in the analysis note (massX^2 < 0.4
> GeV^2), the spectrum is from separation energies > 100 MeV. These separation
> energies are too large to come from simply pulling out a proton from the nuclei
> of interest. Instead, I assume, that the data we have with massX^2 < 0.4 GeV^2
> is due to scattering of the proton off of another nucleon. Such an effect is
> discussed in a paper by K. Nakamura et. al. (Nucl. Phys. A 268, (1976) 381-407)
>
> If I can make the assumption that the unphysical region is from a proton
> scattering off another nucleon, then I can get an approximation for the
> systematic uncertainty in the scale factors due to the different types of
> target nuclei.
>
> It will take a bit more writing that I want to send in an email, so I'll
> try and make a pdf to send around tomorrow to show how I'm trying to
> approximate the systematic uncertainty.
>
> Take care,
> Michael
>
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