[Gate-users] Ion source does not generate any hits

[Jannis Fischer]

Dear GATE community,

I'm trying to implement a Sodium-22 source in GATE, but I have a hard 
time getting it to work. My minimal code for the source is:

-----

/gate/source/addSource point_Na22
/gate/source/point_Na22/setActivity 1000 Bq
/gate/source/point_Na22/gps/particle ion
/gate/source/point_Na22/gps/ion 11 22 0 0
/gate/source/point_Na22/setForcedUnstableFlag true
/gate/source/point_Na22/useDefaultHalfLife
/gate/source/list

-----

GATE starts without error, however no hits are generated. The source is 
recognized and listed:

Source --------------> point_Na22
   ID                 : 0
   type               : gps
   activity (Bq)      : 1000
   startTime (s)      : 0
   time (s)           : 0
   forcedUnstable     : 1
   forcedHalfLife (s) : 8.2135e+07
   verboseLevel       : 0
   relative to vol    : world
----------------------

My physics is set by

/gate/physics/addPhysicsList QGSP_BERT_EMV
/gate/physics/addProcess RadioactiveDecay

The last line does not have any effect. Other sources work fine (like 
back-to-back gammas or positrons) no matter if the last line about 
RadioactiveDecay is present of not.

I tried to look into the list archives, but Gmane is down and I was not 
able to browse it. However, from the short text in Google I conclude 
that others have had this problem before. Can you help me, please?

Thank you and kind regards,

Jannis

-- 
ETH Zürich
Jannis Fischer, MSc
PhD Student
Departement of Physics
Institute of Particle Physics
ETH Hönggerberg HPK E31
Otto-Stern-Weg 5
CH-8093 Zürich

Telefon +41 75 411 6786
Telefax +41 22 76 68242
jannis.fischer at cern.ch
jannis.fischer at phys.ethz.ch
http://safir.ethz.ch