[Gate-users] ASCII Singles file is empty when I use opticaladder digitizer

[open researcher]

Hello everybody!
my simulations contains detection of optical photons.
when I use /gate/digitizer/Singles/insert opticaladder, my ascii Singles
file is empty. But when I comment the command, ascii single file has the
recordings (is that mean optical photons are not generated ?).
I have set export GATE_USE_OPTICAL = 1 on. (When I source the env_gate.sh I
even get the message 'Transport and generation of optical photons is
enabled')
My materials.xml has properties of LSO and NaI, I tried with both crystals
but didn't work out.
Any help ?
thanks in advance


LSO has - ------------------------------------------
<?xml version="1.0"?>
<materials>
 <material name="LSO">
   <propertiestable>
     <property name="SCINTILLATIONYIELD" value="26000" unit="1/MeV"/>
     <propertyvector name="ABSLENGTH" unit="mm" energyunit="eV">
       <ve energy="6.49" value="0.231"/>
       <ve energy="6.36" value="0.232"/>
       <ve energy="6.23" value="0.321"/>
       <ve energy="6.11" value="0.423"/>
       <ve energy="5.99" energyunit="eV" value="0.483" unit="cm"/>
     </propertyvector>
   </propertiestable>
 </material>
</materials>
--------------------------------------------------------------------
NaI has
<material name="NaI">
    <propertiestable>
      <property name="SCINTILLATIONYIELD" value="52000" unit="1/MeV"/>
      <property name="RESOLUTIONSCALE" value="4.41"/>
      <property name="FASTTIMECONSTANT" value="620" unit="ns"/>
      <property name="YIELDRATIO" value="1"/>
      <propertyvector name="FASTCOMPONENT" energyunit="eV">
<ve energy="2.95167" value="1"/>
      </propertyvector>
      <propertyvector name="ABSLENGTH" unit="m" energyunit="eV">
<ve energy="4.08" value="50"/>
<ve energy="1.84" value="50"/>
      </propertyvector>
      <propertyvector name="RINDEX" energyunit="eV">
<ve energy="4.08" value="1.85"/>
<ve energy="1.84" value="1.85"/>
      </propertyvector>
    </propertiestable>
  </material>
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