Hallo
> Do you mean the potential value must be input by myself if the
> material is not the pre-defined Fluka material?
not at all. FLUKA is able to evaluate it as printed in the output file,
e.g.:
***** dp/dx : material number 86 "CONCRETE" *****
***** Average excitation energy : 1.3068E+02 eV, weighted Z/A : 5.0095E-01 *****
You can change it if you have valid reasons to do it.
Best
Francesco
**************************************************
Francesco Cerutti
CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. ++41 22 7678962
fax ++41 22 7668854
On Mon, 23 Nov 2015, YANG Tao wrote:
>
> Dear Mikhail,
>
> Thanks for your kind help. Do you mean the potential value must be input by myself if the
> material is not the pre-defined Fluka material?
>
> best regards!
>
> Tao Yang
>
> -----原始邮件-----
> 发件人: "Mikhail Polkovnikov <Михаил Полковников>" <pmk_at_ihep.ru>
> 发送时间: 2015年11月23日 星期一
> 收件人: "YANG Tao" <yangt_at_ihep.ac.cn>, "fluka-discuss_at_fluka.org"
> <fluka-discuss_at_fluka.org>
> 抄送:
> 主题: Re: [fluka-discuss]: MAT-PROP card
>
> 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 Σi(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.
>
>
>
> ----- 原始邮件-----
> 发件人: "Mikhail Polkovnikov <Михаил Полковников>"
> <pmk_at_ihep.ru>
> 发送时间: 2015年11月23日 星期一
> 收件人: "YANG Tao" <yangt_at_ihep.ac.cn>,
> "fluka-discuss_at_fluka.org" <fluka-discuss_at_fluka.org>
> 抄送:
> 主题: 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
>
>
> --
>
> 杨涛
> 中科院高能所东莞分部（东莞中子科学中心）加速器技术部
> 地址：东莞市大朗镇中子源路1号中国散裂中子源A2栋606室
> E-mail：yangt_at_ihep.ac.cn
> 电话：0769-38944239
> 邮编：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
>
>
> --
>
> 杨涛
> 中科院高能所东莞分部（东莞中子科学中心）加速器技术部
> 地址：东莞市大朗镇中子源路1号中国散裂中子源A2栋606室
> E-mail：yangt_at_ihep.ac.cn
> 电话：0769-38944239
> 邮编：523803
>
>
>
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Received on Mon Nov 23 2015 - 16:06:43 CET