Dear Vladimir,
I see that your target is made of natural hydrogen. Natural hydrogen contains
around 0.01% of deuterium and a reasonable possibility is that the reactions
you observe when you use a K+ beam - where all the quantum numbers (charge,
strangeness) are conserved but apparently the baryon one - are reactions on
deuterium. To check this I would try to do a test with pure hydrogen (you can
define it by using a MATERIAL card with what(6)=1.0 to overwrite -or define as
new material- your HYDROGEN material; if you use a different name and neutrons
are important in your problem remember in this case to set the correspondence
between FLUKA materials and low-energy neutron cross section via the LOW-MAT
card, I would do this in any case).
Hope it helps,
kind regards,
Anna
Am Tue, 15 Apr 2014 15:38:50 +0400 schrieb matveev_at_itep.ru:
>
>
> Dear Fluka Developers,
> In my test a K+ was entered the liquid hydrogen volume at 0.5 GeV/c.
> The parameters of the material were set to Z=1, A=1.00794, density=0.078.
> The statistics was 1M beams.
> Using mgdraw.f (entry usdraw) output I see 5 events in final state
> K0,p,p (npart=3,kpart=24,1,1) and 9 events in K+,n,p state.
> I tested a kaonzero (id=24) beam as well.
> The usdraw gives me either code 100 K0,p final state
> or code 101 K+,n state.
> This seems to be reasonable.
> Could you please explain the result with K+.
> Sincerely,
> Vladimir
>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Anna Ferrari
Institute of Radiation Physics
Helmholtz-Zentrum Dresden-Rossendorf e.V.
Tel. +49 351 260 2872
a.ferrari_at_hzdr.de
http://www.hzdr.de
Vorstand: Prof. Dr. Dr. h. c. Roland Sauerbrey, Prof. Dr. Dr. h. c. Peter
Joehnk
Vereinsregister: VR 1693 beim Amtsgericht Dresden
Received on Mon Apr 21 2014 - 14:05:14 CEST