I have a problem with the energy deposit on a CdTe detector with  G4EMLOW2.3 in
particulary with G4LowEnergyBremsstrahlung.
When I decide to shoot photons of 10 keV on a piece of CdTe material, I find
that there is more energy deposited (dE) than the initial energy of the
photon.  (see step 1 of particle e- in column dE(MeV) the energy is 18.8 keV
it's impossible!!!!)



/gun/particle gamma
/gun/energy 10 keV


>>> Event 0

********************************************************************************
*************************
* G4Track Information:   Particle = gamma,   Track ID = 1,   Parent ID = 0
********************************************************************************
*************************

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng
NextVolume ProcName
    0        2      550      -20      0.01        0        0         0
World initStep
    1        2     18.3      -20      0.01        0      532       532
CZT Transportation
    2        2     18.2      -20         0 0.000613  0.00107       532
CZT LowEnPhotoElec
    :----- List of 2ndaries - #SpawnInStep=  1(Rest= 0,Along= 0,Post= 1),
#SpawnTotal=  1 ---------------
    :         2      18.2       -20   0.00939                 e-
    :-----------------------------------------------------------------
EndOf2ndaries Info ---------------

********************************************************************************
*************************
* G4Track Information:   Particle = e-,   Track ID = 2,   Parent ID = 1
********************************************************************************
*************************

Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng
NextVolume ProcName
    0        2     18.2      -20   0.00939        0        0         0
CZT initStep
    1        2     18.2      -20         0   0.0188 0.000808  0.000808
CZT LowEnBrem



The material CdTe is defined by


 //CdTe
  G4Element* Cd = new G4Element("Cadmium", "Cd", z=48., a= 112.411*g/mole);
  G4Element* Te = new G4Element("Tellurium"  , "Te", z=52., a= 127.60*g/mole);

  CdTe = new G4Material("CdTe", density= 6200*kg/m3, nel=2);
  CdTe ->AddElement(Cd,1);
  CdTe ->AddElement(Te,1);



The physicList is:



	if (particleName == "gamma") {
      // gamma

      pmanager->AddDiscreteProcess(new G4LowEnergyCompton);
      pmanager->AddDiscreteProcess(new G4LowEnergyPhotoElectric);
      pmanager->AddDiscreteProcess(new G4LowEnergyGammaConversion);


    } else if (particleName == "e-") {


      G4VProcess* theeminusMultipleScattering = new G4MultipleScattering();
      G4VProcess* theeminusIonisation         = new G4LowEnergyIonisation();
      G4VProcess* theeminusBremsstrahlung     = new G4LowEnergyBremsstrahlung();

      // add processes
      pmanager->AddProcess(theeminusMultipleScattering);
      pmanager->AddProcess(theeminusIonisation);
      pmanager->AddProcess(theeminusBremsstrahlung);
      //
      // set ordering for AlongStepDoIt
      pmanager->SetProcessOrdering(theeminusMultipleScattering, idxAlongStep,1);
      pmanager->SetProcessOrdering(theeminusIonisation,         idxAlongStep,2);
      pmanager->SetProcessOrdering(theeminusBremsstrahlung,     idxAlongStep,3);
      //
      // set ordering for PostStepDoIt
      pmanager->SetProcessOrdering(theeminusMultipleScattering, idxPostStep,1);
      pmanager->SetProcessOrdering(theeminusIonisation,         idxPostStep,2);
      pmanager->SetProcessOrdering(theeminusBremsstrahlung,     idxPostStep,3);

    }


When I execute the program the following is written on the screen:


"Bremsstrahlung Angular Generator is Modified Tsai
Universal distribution suggested by L. Urban (Geant3 manual (1993) Phys211)
Derived from Tsai distribution (Rev Mod Phys 49,421(1977))"


when i use this list:

      pmanager->AddDiscreteProcess(new G4ComptonScattering);
      pmanager->AddDiscreteProcess(new G4PhotoElectricEffect);
      pmanager->AddDiscreteProcess(new G4GammaConversion);

and
      G4VProcess* theeminusIonisation         = new G4eIonisation();
      G4VProcess* theeminusBremsstrahlung     = new G4eBremsstrahlung();


it's writen when file is execute:

	"phot:  Total cross sections from Sandia parametrisation."

If i do not use the Low Energy process but this precedent list the result
is correct (energy deposit is 10 keV for an gamma of 10 keV)



So when I am shooting with a PROTON whith the Low Energy process, the energy
deposit is correct too.
But the big problem is if i want to shoot an energy higher than 10 keV, using
the Low Energy process, i have a big different in energy deposit than if i do
not use this process.

Could you please help me because i don't know which processus I should use. A
colleague said to me that the problem may be due to the SetCuts() but i don't
know which cut to set and in which way.

I found out that if I make the cut (in e- range)  smaller, the energy deposit
get closer to the correct value (initial energy of the photon),

example:

defaultCutValue = 1.*mm;  //bad result with this value
defaultCutValue = 0.000001*mm;	  //better result but still false ( > energy
init)

Thank you very much in advance.