[Gate-users] ion source and nuclear de-excitation

[Pietrzyk, Uwe]

Dear Richard,

this problem is known for a while and is linked to gate_v6.2.
I switched back to version 6.1, yet you need the proper
physics-list / model selection. Please check attached file
physics.mac, which I use to simulate spectra from ion sources
like I-131, Cs-137, Lu-176, … mainly for educational purposes
and future examples in EduGATE.
The GATE-experts are looking into this issue, which seems to
be caused by the combination with a more recent GEANT4 version,
but I am not an expert in this!

Hope this helps!

Kind regards,

Uwe Pietrzyk
/----------------------------------------------------------------------
Prof. Dr. Uwe Pietrzyk
Diplom-Physiker
Institut für Neurowissenschaften und Medizin / INM-4
Forschungszentrum Jülich GmbH
52425 Jülich
Tel: +49-2461-61 4763
Fax: +49-2461-61 2820
Mobil: +49-162-103-4871
eMail: U.Pietrzyk at fz-juelich.de
http://www.fz-juelich.de/inm/inm-4/DE/Home/home_node.html
&
Bergische Universität Wuppertal
Fachbereich C - Physik / D.08.01
Gaußstr. 20
42097 Wuppertal
Tel: +49-(0)202-439-3523
Fax: +49-(0)202-439-2811
eMail: Uwe.Pietrzyk at physik.uni-wuppertal.de
http://www.medizinphysik.uni-wuppertal.de
----------------------------------------------------------------------/





On 19.06.2013, at 00:15, Taschereau, Richard wrote:

> Hi All,
> 
> I am using the ion source for 176Lu with the RadioactiveDecay process on.
> 
> The decay part works fine, i.e. 176Lu decays to 176Hf.  However, the deexcitation of the daughter nucleus (176Hf) doesn't seem to take place.  Here's an excerpt from a trace where you can see that the daughter nucleus is left in an excited state (597 keV) but no deexcitation occurs. I have all the data files for PhotonEvaporation.  Is there another process I need to activate?
> 
> Thanks,
> Richard
> 
> p.s. Gate V6.2, geant4.9.5.p02, PhotonEvaporation2.2, /RadioactiveDecay3.4
> 
> (...)
> 
> *********************************************************************************************************
> * G4Track Information:   Particle = Hf176[597.0],   Track ID = 2,   Parent ID = 1
> *********************************************************************************************************
> 
> Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
>    0        0        0        0  1.53e-06        0        0         0 cylindricalPET_phys initStep
>    1    -14.1      -25    -23.1  1.53e-06        0     36.8      36.8    BGO_phys Transportation
>    2    -14.4    -25.7    -23.7  1.53e-06        0    0.996      37.8  block_phys Transportation
>    3    -14.5    -25.8    -23.8  1.53e-06        0    0.124      37.9    BGO_phys Transportation
>    4    -14.6    -25.9      -24  1.53e-06        0    0.262      38.2  block_phys Transportation
>    5    -14.7    -26.1    -24.1  1.53e-06        0    0.203      38.4    BGO_phys Transportation
>    6    -15.5    -27.7    -25.5  1.53e-06        0     2.32      40.7  block_phys Transportation
>    7    -15.6    -27.7    -25.6  1.53e-06        0    0.124      40.9    BGO_phys Transportation
>    8    -16.4    -29.2      -27  1.53e-06        0     2.14        43  block_phys Transportation
>    9    -16.5    -29.3    -27.1  1.53e-06        0    0.203      43.2    BGO_phys Transportation
>   10    -16.7    -29.6    -27.4  1.53e-06        0     0.45      43.6  block_phys Transportation
>   11    -16.7    -29.7    -27.5  1.53e-06        0    0.124      43.8    BGO_phys Transportation
>   12    -17.8    -31.6    -29.2  1.53e-06        0     2.79      46.6  block_phys Transportation
>   13    -17.8    -31.7    -29.3  1.53e-06        0    0.124      46.7    BGO_phys Transportation
>   14    -18.1    -32.2    -29.7  1.53e-06        0    0.744      47.4 cylindricalPET_phys Transportation
>   15    -84.3     -150     -139  1.53e-06        0      174       221  world_phys Transportation
>   16     -562   -1e+03     -924  1.53e-06        0 1.25e+03  1.47e+03  OutOfWorld Transportation
> 
> 
> Richard Taschereau, Ph.D.
> Associate Researcher
> UCLA Crump Institute for Molecular Imaging
> 570 Westwood Plaza, Building 114, room 4350-C
> Los Angeles, CA 90095-1770
> Phone: (310) 825-0697
> Fax:     (310) 206-8975
> 
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