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