Dear Elena,
I have information only the attenuation (absorption) information. The
attenuation length about 7—15 m at λ=480 nm.
Source:
http://store.niic.nsc.ru/en/products/materials/bgo/
Best regards,
Mikhail
On 05.10.2018 11:08, Elena Donegani wrote:
>
> Dear Mikhail,
>
> thanks a lot for your reply.
>
> Could you please tell us if you know the values of the absorption and
> diffusion coefficient for BGO?
>
> I am sorry, up to now I could not find such values in literature.
>
>
> Thank you very much.
>
> Best Regards,
>
> Elena Donegani
>
>
>
>
>
> Dear Thomas,
>
> You didn't set refraction index for the scintillator material (mean
> value is 2.15), as well as absorption and diffusion coefficients. That
> gives you an optical photon generation and transport.
>
> *...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....
>
> OPT-PROP 2.15 Bi4Ge3O1
>
> Best regards,
>
> Mikhail
>
> ------------------------------------------------------------------------
> *Von:* owner-fluka-discuss_at_mi.infn.it <owner-fluka-discuss_at_mi.infn.it>
> im Auftrag von Andrea Fontana <andrea.fontana_at_pv.infn.it>
> *Gesendet:* Donnerstag, 4. Oktober 2018 17:16:42
> *An:* Thomas Grandsaert; Santana, Mario
> *Cc:* fluka-discuss
> *Betreff:* Re: [fluka-discuss]: How to get the OPT-PROP absorption and
> diffusion coefficient
> Hi Thomas,
> I think I can help you for the BGO absorption coefficient.
> You can find some data in the following papers:
>
> 1) Growth and holographic characterization of nonstoichiometric
> sillenite-type crystals
> H. Vogt, K. Buse, H. Hesse, E. Krätzig, and R. R. Garcı́a
> https://doi.org/10.1063/1.1400095
> (see Fig. 3)
>
> 2) Optical properties of single crystal Bi4Ge3O12 from the infrared
> to ultraviolet
> Hamna F. Haneef, and Nikolas J. Podraza
> https://doi.org/10.1063/1.4898762
> (again Fig. 3)
>
> Regarding the diffusion coefficient, unfortunately I have no info,
> but I am looking...
>
> Hope this helps.
> Best,
> Andrea
>
> Il 04/10/2018 13:20, Thomas Grandsaert ha scritto:
> >
> > Thank you Mario.
> >
> > In that case, let me ask directly: does any Fluka user have Diffusion
> > and Absorption coefficients for BGO available?
> >
> > Cheers,
> > T
> >
> > *From:*Santana, Mario <msantana_at_slac.stanford.edu>
> > *Sent:* den 26 september 2018 11:47
> > *To:* Thomas Grandsaert <Thomas.Grandsaert_at_esss.se>
> > *Cc:* fluka-discuss <fluka-discuss_at_fluka.org>
> > *Subject:* Re: [fluka-discuss]: How to get the OPT-PROP absorption and
> > diffusion coefficient
> >
> > Hi Thomas,
> >
> > Those coefficients are not provided by FLUKA. You will need to measure
> > those or find them in specialized literature.
> >
> > Hopefully some FLUKA user has some values that fit your range of
> interest.
> >
> > -M
> >
> > On Sep 25, 2018, at 2:49 AM, Thomas Grandsaert
> > <Thomas.Grandsaert_at_esss.se <mailto:Thomas.Grandsaert_at_esss.se>>
> wrote:
> >
> > Hello Fluka experts,
> >
> > We are trying to simulate the optical photon yield from a BGO
> > scintillator in our machine.
> >
> > Two parameters in the OPT-PROP include the absorption and
> > diffusion coefficient.
> >
> > I read the documentation. Is it accurate to say:
> >
> > The absorption parameter is the inverse of the mean free path
> > before absorption in the scintillator medium
> >
> > The diffusion parameter is the inverse of the mean free path
> > before scattering in the scintillator medium
> >
> > Furthermore, how can we acquire/calculate these parameters?
> >
> > Cheers and thank you in advance,
> > T
> >
>
> --
> ========================================================================
> Dr. Andrea Fontana tel: +39 0382 987991
> Istituto Nazionale fax: +39 0382 423241
> di Fisica Nucleare
> Sezione di Pavia e-mail: andrea.fontana_at_pv.infn.it
> Via Bassi 6 web : www.pv.infn.it/~fontana
> <http://www.pv.infn.it/%7Efontana>
> 27100 PAVIA, Italy
> ========================================================================
>
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Received on Fri Oct 05 2018 - 13:24:43 CEST