RE: [fluka-discuss]: muon production frm gamma conversion or positron annhilation

From: Fasso, Alberto <fasso_at_slac.stanford.edu>
Date: Sat, 9 Nov 2013 09:50:57 -0800

You don't get any muons because the cross section for muon pair production is very small (about 1.E4 times smaller than that for e+e- production). You need to bias the production by a factor of that order.
Set WHAT(2) = 1.E-4 in the PHOTONUC card with SDUM=MUMUPAIR.

Alberto
________________________________________
From: owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] On Behalf Of Andrea.Mairani_at_mi.infn.it [Andrea.Mairani_at_mi.infn.it]
Sent: Saturday, November 09, 2013 8:22 AM
To: "belgin pilišer"
Cc: fluka-discuss_at_fluka.org
Subject: Re: [fluka-discuss]: muon production frm gamma conversion or positron annhilation

Dear User,
Can you please send us your entire input? So we can check it and in case
run it..
Regards,
Andrea

> Dear Fluka Users,
>
> I want to produce the energy spectrum of muons from positron annihilation
> or gamma conversion by impinging the electrons to carbon target. Is it
> possible?
> I read that by using PHOTONUC card, MuMuPair option can switch on.
> I used these cards but I didn't observe the muons.
>
> PHOTONUC 1111. 0.0 0.0 CARBON CARBON
> 0.0MUMUPAIR
> USRTRACK 1. MUONS -26. TARGET 500.mu
> USRTRACK 1500.0 500.
> USRBIN 11. MUONS -21. 10.0 0.0 40.0mu
> USRBIN 0.0 0.0 0.0 100.0 1.0 400. &
> USRBIN 11. ENERGY -24. 10.0 0.0 40.0edep
> USRBIN 0.0 0.0 0.0 100.0 1.0 400. &
>
> Thanks for your advice and help from now.
>
Received on Sat Nov 09 2013 - 19:36:38 CET

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