Just a minor addition: if the gas pressure is different from 1 atmosphere
(e.g., for high pressure ion chamber) you do need a MAT-PROP card to
supply this info via What(1).
Cheers
Stefan
On Mon, 23 Nov 2015, Mikhail Polkovnikov <?????? ???????????> wrote:
> On 23.11.2015 15:26, YANG Tao wrote:
>
> Dear Mikhail !
>
> Thanks for your reply. Then what is the mean excitation energy
> of the mixture, is it the linear superposition of each value
> like ?i(w_i*I_i)? Assume w_i is the volumetric weight. And does
> this value should be provided by me in the input file or as
> default, that is to say, it is left blank and calculated from
> systematic?
>
> Best Regards,
>
> Tao Yang.
>
>
>
> ----- ????-----
> ???: "Mikhail Polkovnikov <?????? ???????????>" <pmk_at_ihep.ru>
> ????: 2015?11?23? ???
> ???: "YANG Tao" <yangt_at_ihep.ac.cn>,
> "fluka-discuss_at_fluka.org" <fluka-discuss_at_fluka.org>
> ??:
> ??: Re: [fluka-discuss]: MAT-PROP card
>
> On 22.11.2015 04:55, YANG Tao wrote:
>
> Hi, everyone!
>
> I used FLUKA to simulate the ionization chamber
> response, the work gas is a mixture of argon and
> nitrogen gas. I creat a compound card in FLUKA to
> set the properties for it. However, in the MAT-PROP
> card, I have no idea of WHAT(3)-the average
> ionization potential, is this value input by me or
> as default (calculated from systematics)? If it is
> the previous case, how should I obtain the value?
>
> Many thanks in advance.
>
>
> --
> Tao Yang, CAS.
>
> Dear Tao Yang,
>
> Please look the mean excitation energy for natural materials at
> the PDG official site.
> For argon gas the value is 188.0 eV, and for nitrogen it's 82
> eV.
>
>
> Best regards,
> Mikhail
>
>
> --
>
> ??
> ??????????????????????????
> ?????????????1????????A2?606?
> E-mail?yangt_at_ihep.ac.cn
> ???0769-38944239
> ???523803
>
> Dear Tao Yang,
>
> If you use FLUKA gas materials: ARGON, NITROGEN - they already had these
> values, so FLUKA could calculate mean excitation energy for the mixture from
> systematics, and you don't need to use MAT-PROP card.
>
>
> Best regards,
> Mikhail
>
>
>
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Received on Thu Nov 26 2015 - 17:57:34 CET