[Halld-cpp] [EXTERNAL] Re: C++ classes for the 208Pb FFs

[Richard Jones]

Ilya,

Sure, that works. I will take whatever you can share with me and
parameterize it for use within a Monte Carlo generator.

-Richard Jones

On Fri, Jul 9, 2021 at 10:41 AM Ilya Larin <ilarin at jlab.org> wrote:

>
>  Hello Richard and Elton.
>
> I do have Fortran code for the lead FF.
> The approach we used takes into account
> internal absorption (reducing FF value accordingly) and thus it gives a
> complex value
> (like in optics light absorption can be described as an imaginary part of
> the refraction index).
> I can look it up. It takes about a few seconds for the Fourier Bessel
> nucleus density model to calculate the value. For the low Q^2 values
> it needs more accuracy since the region of integration
> proportional to 1/Q, so it takes even longer.
>
> Let me know if it is what you are asking.
>
>  Thank you.
>  Ilya
>
>
> ------------------------------
> *От:* Halld-cpp <halld-cpp-bounces at jlab.org> от имени Richard Jones <
> rjones30 at gmail.com>
> *Отправлено:* 7 июля 2021 г. 17:12
> *Кому:* Elton Smith <elton at jlab.org>
> *Копия:* halld-cpp at jlab.org <halld-cpp at jlab.org>
> *Тема:* [Halld-cpp] [EXTERNAL] Re: C++ classes for the 208Pb FFs
>
> Elton,
>
> Having them in fortran is just as good, I can do the translation.
>
> -rtj
>
> On Wed, Jul 7, 2021 at 4:51 PM Elton Smith <elton at jlab.org> wrote:
>
> *Message sent from a system outside of UConn.*
>
>
> Dear colleagues,
>
> Richard has requested that we provide him with C++ classes for the 208Pb
> form factors. I do not think we have them immediately available, but we
> should be able to provide them. In fact it might be useful to have them
> packaged systematically in that way for our own benefit. We should discuss
> how best to get this done at our next meeting. Any volunteers?
>
> Thanks, Elton
>
>
>
> ------------------------------------
> Elton Smith
> Jefferson Lab MS 12H3
> 12000 Jefferson Ave STE 4
> Newport News, VA 23606
> (757)269-7625
>
>
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