[Gate-users] arrown spectrum of SPECT detector

[LLKI JJJY]

Dear All, Please, I want to calculate the energy spectrum of a tc99m source by a SPECT detector. I tried using the EnergySpectrumActor, as described in the bellow code :

/gate/actor/addActor EnergySpectrumActor MyActor
/gate/actor/MyActor/save Spectre.root
/gate/actor/MyActor/energySpectrum/setEmin 120 keV
/gate/actor/MyActor/energySpectrum/setEmax 170 keV
/gate/actor/MyActor/energySpectrum/setNumberOfBins 100
/gate/actor/MyActor/energyLossHisto/setEmin 120 keV
/gate/actor/MyActor/energyLossHisto/setEmax 160 keV
/gate/actor/MyActor/energyLossHisto/setNumberOfBins 100
/gate/actor/MyActor/attachedTo crystal


 but the peak is shown very narrower arrownd 140 KeV, olso I changing the energy resolusion but the stay he same.
waintig yor help.

Thanks
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