RE: [fluka-discuss]: RE: Delta-ray production

From: Senger, Anna Dr. <A.Senger_at_gsi.de>
Date: Fri, 14 Mar 2014 14:07:26 +0000

Dear Alfredo.
Is there progress with EM-DISSO?

Regards
Anna

-----Original Message-----
From: Alfredo Ferrari [mailto:alfredo.ferrari_at_cern.ch]
Sent: Montag, 10. März 2014 14:14
To: Senger, Anna Dr.
Cc: 'alfredo.ferrari_at_cern.ch'; 'fluka-discuss_at_fluka.org'
Subject: RE: [fluka-discuss]: RE: Delta-ray production

Dear Anna

what(1) should be 2.0 rather than 4.0 since for your problem you are interested in both target and projectile dissociation. I am puzzled by the rror you report, apparently you have a compound with more than 80 elements which I do not believe... could you please send you input file?

             Thanks
            Alfredo


+----------------------------------------------------------------------+
| Alfredo Ferrari || Tel.: +41.22.76.76119 |
| CERN-EN/STI || Fax.: +41.22.76.69474 |
| 1211 Geneva 23 || e-mail: Alfredo.Ferrari_at_cern.ch |
| Switzerland || |
+----------------------------------------------------------------------+

On Mon, 10 Mar 2014, Senger, Anna Dr. wrote:

> Dear Alfredo.
> I used
>
> PHYSICS 4. EM-DISSO
>
> but my job crashed with error:
>
> "Subscript out of range on file line 227, procedure xeldis.f/xeldis.
> Attempt to access the 81-th element of variable izelds."
>
> Best regards
> Anna
>
> -----Original Message-----
> From: Alfredo Ferrari [mailto:alfredo.ferrari_at_cern.ch]
> Sent: Montag, 10. März 2014 10:44
> To: Senger, Anna Dr.
> Cc: 'fluka-discuss_at_fluka.org'; Alfredo.Ferrari_at_cern.ch
> Subject: Re: [fluka-discuss]: RE: Delta-ray production
>
> Dear Anna
>
> surely it would be better to use the PRECISIOn default for your specific problem and to activate explicitly for the Au-Au case both ElectroMagnetic dissociation and heavy ion direct pair production (look at the PHYSICS card for both).
>
> The "step" that you see in the electron spectrum for the Au-Au case is likely due to the different weigth of two components, a) the delta-rays emitted by the ions, whose end-point is exactly where you see the "step"
> as you can compute yourself, and b) the e-e+ coming from pi0 production and gamma conversion or anyway more in general from nuclear interactions.
>
> Both components exist for p-Au too, but the delta-ray component scales
> like Z^2 (79^2) while the nuclear component scales with something like
> A^2/3 -> ergo for the p-Au case the delta-ray component is much
> smaller in a relative sense
>
> Ciao
> Alfredo
>
> +----------------------------------------------------------------------+
> | Alfredo Ferrari || Tel.: +41.22.76.76119 |
> | CERN-EN/STI || Fax.: +41.22.76.69474 |
> | 1211 Geneva 23 || e-mail: Alfredo.Ferrari_at_cern.ch |
> | Switzerland || |
> +----------------------------------------------------------------------+
>
> On Mon, 10 Mar 2014, Senger, Anna Dr. wrote:
>
>>
>> Dear FLUKA experts.
>>
>> My question is rather important for CBM detector and electronics
>> development. We found, that after 60 cm C absorber the ionizing
>> energy loss due to electrons from the target is very high for 35 AGeV
>> gold beam. We try to understand, it is realistic or not. I produced
>> usrtrack-plot for electrons in 1mm from the target for Au and p beams.
>> There is one step in the distribution for Au beam. Is it correct? And
>> were all possible processes of the delta-electron production included for the Au beam for "NEW-DEFA"
>> option?
>>
>>  
>>
>> Best regards
>>
>> Anna Senger
>>
>>  
>>
>> From: owner-fluka-discuss_at_mi.infn.it
>> [mailto:owner-fluka-discuss_at_mi.infn.it]
>> On Behalf Of Senger, Anna Dr.
>> Sent: Mittwoch, 5. März 2014 14:25
>> To: 'fluka-discuss_at_fluka.org'
>> Subject: [fluka-discuss]: Delta-ray production
>>
>>  
>>
>> Dear FLUKA experts,
>>
>> I have a question about delta-ray production in target. I simulate Au
>> beam _at_
>> 35 AGeV, and I have 1% gold target.
>>
>> If I use "default" settings, is form factor included in delta-ray
>> production in target?
>>
>>  
>>
>> Best regards
>>
>> Anna Senger
>>
>>
>>
>
Received on Fri Mar 14 2014 - 16:15:29 CET

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