[Gate-users] surface finish in DETECT2000

[徐铖]

Thank you very much.
Actually, I was wondering  something more practical:
For example, if we set "Metal 0.20" as the surface finish, then how can we
deal with the crystal surface in experiment?
2009/4/10, Simon Stute <gate.stute at gmail.com>:
>
> Hi,
>
> A colleague how works with DETECT2000 gave me this answer:
>
> """"""""""""""""""""""""""""
> METAL simulates a dielectric/metal interface : when a scintillation photon
> arrives on this interface, it is whether reflected following Snell Descartes
> laws with a probability of Rc or absorbed. Thus it simulates a perfect (if
> Rc =1) reflector
>
> PAINT simulates a lambertian reflexion = a perfect diffusor
>
> Using METAL or PAINT, the optical index of the second medium is ignored.
> This is not the case with POLISH or GROUND optical coatings where Fresnel
> factor is taken into account. Rc is then the probability for the optical
> photon to return in medium one in a lambertian way knowing it has already
> been transmitted in medium two.
>
> """"""""""""""""""""""""""""
>
> Cheers,
> Simon
>
>  On Fri, Apr 10, 2009 at 10:28 AM, 徐铖 <xchengbio2006 at gmail.com> wrote:
>
>> Dear Gaters:
>>       I guess someone here  is also very familiar with DETECT2000.There is
>> a question:
>>       When the surface of scintillation crystal is polished/matte,and
>> teflon covered, people choose"POLISH 0.98RC"/"GROUND 0.98RC" for simulation
>> .Then what about "METAL" and "PAINT".It seems they were seldom mentioned.
>>       If someone can introduce something about that or recommend some
>> literature, I'll appreciate for that very much.
>> _______________________________________________
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>> Gate-users at lists.healthgrid.org
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>>
>>
>


-- 
Cheng Xu
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