[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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